1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713ecd9466379f9d9c17c727baa3ff65dfcd0366801893bf70ef5c4e8e50624. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d39e281-e7d9-4f68-a76b-e69393d9cf93.json and https://artists.proofprofile.net/proofs/artist/7d39e281-e7d9-4f68-a76b-e69393d9cf93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9126a246dd8568024467693c1fb55a85f6faecd4b217d19cca9eccd87e3624. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:36:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZBRF1809184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8b3301ad60dc41efdc1280341badc599e065e122e11ad4212d13d1718b5431. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCE61876004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06b026677bd9d9bc2b248ad37df8d7931e640a48aa86096c787ce5e0403d413. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:56:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZCE61875495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343781bd58bb4a00272bbe5e799ac815f6a875290bef7de6d38e73644eb2aae1. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:24:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA41810621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7f3cdfc6b9bc74dca894e9848a1db85a99256590df4d3f90a47f6599b166fe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1813480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cb96c8378cc9dc1fe8cf43f97519d6a8ca715ffc855b9464ed2e535100ce2b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1813482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2971c7c9ee8bfeafe41bab98052e8f509f2b5e5c7cb8b4748a0e0d441fdbedb5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1813484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba80b73dd0d136985fbf0a4f41a1dd9ce69318d7edf2a41e722a52f26933eeb3. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1813487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07762649cf8f73e695a6e663bcc5ab1798494d604c6d9a870fb0dd4d7dc7a313. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM2PV1813488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb36bb3cadb23bdfc573ed6c772c93ac02b93806eebbc2a6ea73ccdb57d70f5. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4JJ1844109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed762413ecad4ffc072408b00e4333b730cfc6c07ae24c153d76928183383fd2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4JJ1844111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df8dd171e1a152265f9dd08a9479c6650c47a45ffc69c04ad4541a8fb5848bb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4JJ1844113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1c0a1567e27b9defbff07b7ecd28dd90208f21e132537d4745bb3f27c3ae4c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4JJ1844114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623fa060b6f62c4662848d664283aa8336edd0289a54188bf622a586fb78aae9. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4JJ1844122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2e0465b18da0394910a401df1068c36acf6816d5f2b8f2f1f2a7a8cc2d0b90. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:40:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ4JJ1844123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037fef3695886ef5c18884a7da8422350d8a4b7a4a91178118c443761dfe49a0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN71979798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b47cd81be0a6ec32939633583850fc9d165fb6afc23a90a8ef43809b2ef84f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUNGV1700235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf91c3866baae0c307aa4970fddf9e5fd7206569f3f6bf822c39e2609586f8e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWV2239223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8603dfe5aaeb8452ff3ab44347399d83d56546b25c8c0f6c3cba55cdf35f63. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB52224675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029f757b10560bce3b03a3d93e125ac7516c65f030f11fc645c03f124208fbc7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB52224676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866acfb892f9a5c28ad4a08dfebd77f95f17a8f1b11a16e2d6ae6b39c4c59644. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB52223237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68617b5cb0e667e6f533426c4189d8ac19a34f9854c12032699559df8916942. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2383610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3ebfe5370368d107ed505810968697459eeebef0e250fab7a3ef7e241fb732. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2304275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f293e2d105e1e29ad906666a1eaffb23f605417f97999e1555c364e4fbbf66. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2383684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bb79bc7a7c913979f96690e4c5ff6ff930b9e0763d95e9d6d345b4d8643181. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2383600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbd10459c9975a19c5684073b172d5fc972cc1488ae0b6a58c3756cd1d06301. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:48:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2383609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc63bdc6fbf0fb351ade1e9fb7e1673c0cf71bdd52944b194fd263ea91ed2bb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2383608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafd00fb124dc084fa4ecb8897e727ced6fb60e7e87fa76b2156300a822bd23b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2383607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f3ef6d438e15c03531167924adc216c52a88d0756bbaa87c2e265c21040c2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2343404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2aa4725d9ba227f99f962ccbc74017acc5c0df043794a1b6feacb7e35b9b9b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2383604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa848ff1ee335d8b3da1dbd3178b79401800e2ae8316c48f58de9408f6359ea86. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBE2370809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb3c8e49c9bfd34ccb91e74f812bb06e6e3e9e012432690379528adb891f5a7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFH2320824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f090cf8e84dec308ac5df6c75d395028f222d92c293f39f9ac4d6014b450cf1. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2413440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a71251cf9ba7e8c52a6e94e3f5fa9e9997902f75f33113fb245aa04b83178e2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:08:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2412043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b0b4e9bbfa704c68bca949097094a55e34201c49c2cb4cee685b8e369aae9e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLR2486509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699415e88cbfaec63b1598b0891852c627f6db155f3156dfc41451d22d2fb36d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAZ2453481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ab1a11dc94270030f15e7dd450aeda3273730235b9ed0de09cf815f7f97f00. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92495863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aa4aa88effcb0a2d032313d72243edd35b53f1e3e66826612dcac07d40e7bb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBB2432760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58c2e45b42110079c675c48d1571d4111026de59e91f53871e8f5233595fabb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBB2432761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafe2de93d8f6d67989570ebf17fe9e5b04c16fd1b319a092bb989f49b032f37. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBC2447397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01b3370aa3bfa87525f0eabc63cf2e45169cb9b4c993f7f77ded5b590f62a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUNGV1700486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a43e0819f135baf7014b946681292d3d3f0bd261af1b37e2b3b8bcd38e759b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUNGV1700494.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fee6c04563953d29514fa06affae58861c9d36d822bc5fa1d74f4116f100f9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUNGV1700500.