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 0x6d0d21287aea5e7526504d9cfc5223ce86a66935f488fe390f7bb664f39aeeb3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37636324-246a-42ee-a879-125801fc34a4.json and https://artists.proofprofile.net/proofs/artist/37636324-246a-42ee-a879-125801fc34a4.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 0x6995b6221e0107fe0646b542573b61c8781c65e0db0cf1b5319827a7adb73653. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFYW1941841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8f8cfafd02d0518b6c8992af87272c705f5ed65935235f8fad9ffd657387d2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USUYG1291724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72320800734ce771b6c1475d32c05f21d9c3ff95d5da45dc29044849ed9bfb5. 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/USUYG1291730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc9908539db1b9b11ab87b18392d71330eb07c68c10c4ca01e2d97e4761468f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES62138162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8872d0824b9ed0eed4dfcf21ddead4d27b677dfb5fd0379854e8d77193b3fced. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES62138167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3830329cbf8421a767fd73a149b842b643e6929d35d1160ead5e8dca1a957913. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTBB2200963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e0d94185d6d015ae342765a450aa87261298f25cedd967e61358a5fa8e30de. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6Q2328310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877071fdb225243e78ff2c03fffa72c030fb6fa3e5ebde37016fa20b294059df. 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/QZWFT2503517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd757f9048b10d15f44ad800bad8da70d94458ebccac0aad094da0acbdb52a25. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFT2503518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba68a26b36b047a12af887b7c3f0c54aad4612c0fa685f9a9f24273bfb4056e. 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/QZWFT2503519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30beca9d72ce663946fa2d4c0f8a300bc680e0ecf1870274292ece3a6dfc744. 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/QZWFT2503520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a59099e02c68b4d82fc0fe634159bf9781e42edb579766099308a0f3ff99047. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2503521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb098de5eff930592dc2bfb0d73d4f43048bbac09ea6fb012d07eb3012066e121. 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/QZWFT2503522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964c17d49ec9c7750165348ee52e9f54ad4116752cd9c6db3728f84e39a89d4c. 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/QZWFT2503523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5483058c4b8066625b1d7fc40792252f0183c19f8b41d4ab6243867edf7e0d6b. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZWFT2503524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78a5464f320cc97f32f624ffdf741c5069365f54cd6f07c4c1579c01893bea0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFT2503525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e1a6bf87594c46de0e5001d95c009b55bd7a504c1381fb632724a80a37bf17. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZWFT2503526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64225ae6fe44e9abad4551b7a5736e25868d1c3d8bab0f8801411a1d30ee18ec. 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/QZWFT2503529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe889f8c42f8dc99b3fb56cedd9d9bb9206be923bf1c1f532b224d767f767cd05. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFT2503530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce35288f5b2068fd3a3c21a63ae20dc275c7e0964d30032f39be44477082e3f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFT2503531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf755b4eaccdf292f82d2e20d6cf39d8b45f523aa64f82a45d5e1f88a8411531e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZWFT2503532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49c34354d7747a6174f1281ad48bbff1702acb206ac12b0fb9ae4e25ef746a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:25:20Z), 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/QZWFT2503533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0b77dd64aef77e2b91c7f5167111571444c5b8374c7272ef9fd5623486b433. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFT2503535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f65f4f7dfb309242646f52349b848c2dbb6c7589ecadde3c5fba18d9797368. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:02Z), 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/QZWFT2503536.