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 0xb9d803b27c6fcdf8a717e1c2ca3030dda44858072a816926dee644a260db51da. 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/d2befeb5-3f20-4a76-8ab7-b5c844a2d844.json and https://artists.proofprofile.net/proofs/artist/d2befeb5-3f20-4a76-8ab7-b5c844a2d844.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 0x460a61536aa0812f5bbd78c92c2774c3ba5a31091138b1c87e977b08acbfdbde. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ62181198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6e3ee58f39b22c62ff70ae567d0bb2c5fa3573370bb06adbfa44b5b9c82752. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ62181210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a1735a88cb2ed2c8fb35bbd42f83727100ea8f39fedf881b982fcfb0b782cf. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZFZ62181199.
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 0x967ed61b4da08b9a36d04275d4b28cc9e8e690ce59b07ed113355746c9dec5ef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFZ62181203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d87beb4f2b664c96c5a4248efe9d524b6aa620aab97ffb3bebb126c46ab0e9e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWW2002750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88be97639f23b392a35ff62c55fce6945c5b63be00234e6f473dd82f587d4f56. 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/QZK6F2038586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a991c8becd235911bbcec88167b0a5951ccc07066dc13b0ba89fd994a3f795. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:25Z), 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/QZK6F2038588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d78d1c5c31438f2009f8bbc62242d804cb202fa051ed50f96804269d67b61e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEH742425837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31be0e27878ae5e2dce57664539eae135994c2acb9f516f5bdf7e5d0d330ea9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCD4N2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe7297163bfc1eb1e35f07e26afed02bad5d017b4686dfb9b81431aec2d9f86. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCD4N2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64494c11e017c9869ceefcba1b180a8cade460b0be9126de2815f882ba3b2f7e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCD4N2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe8d208748b4933b30445e7c70cd8bfc9bbef4c60019c3dd112f5b2fba5ed0c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAIL2445949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80449cc57e419e152a8e9d34eac094287d60e4a1deb7fd2f0f9ab93a87b8df35. 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/US3DF2471968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9be03e4c359b4e78f4e5dac6ae956ef415077c8e1666847c3523daffca0613. 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/US3DF2475195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7debf9149db83eaaee5a32337c67caa86777a20651862bb9a6e40489a37d829b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2403206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248f0cba08cf3b364d7cb1207a3960e3e8467ef917e359ddd40530258640229b. 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/US3DF2446950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aafd1afe63bc01f86a44460b6a6cacfa0a93989d8839f0d575a29e1e2c34224. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2436375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55dc36fb9bc23f48b1fb9fa113cfbb7ffd3fdc6090d9314def1e596e4209333. 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/US3DF2421870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422e550876ddc95a05d0a91198813511119507b10027c5f9a821e1eed2f83a47. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN72485383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a6fb0cee33263a2e296eb37e833c55d61e34ca66620d1be6d8cbe8bcd08da. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2420713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21da9a3dca611f9bdce1152d1185f48000a3bdb8a921904eb48fb54a5253de3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2441476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a275b42cd20775dd6a67f2fcd148a45d0e3c945667db75c7d67b1db4e87fc8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US3DF2415304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c62b7395e60c1bfa8c5598c0fb81263c738cc0b82bc6c7c21bb46b04ba5d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM3DF2456898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54ec505eef12a64c900ac66f6cfeafe30a03987eed5db86324c962fd319c556. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US3DF2430043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f60f25bced3d57aac6ff648899c4f0450b1ca3397eb1e424a0b896b2cf938f0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMANG2249579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a43c80f678e31510faa3ff2dd45705ef669868b02298523380003888463f29. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMANG2246579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffdef4f918390018a85879f460834751ccdd99c53ce07281b6efd8ef7212819. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMANG2215866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe987bf379eeb52d8432d875a79f69267414a84ac73458e2e0c8ded51b34f6546. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH742326041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa662afd2007dbbb64afa9fbfef6faac3e2fbb8914cc14df2d127816e3e952b01. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAT2392040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912a3311b7d9d3e529f0a7c74882b3cd29477af7b5bb529cc216d315610caf42. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM3DF2253807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a2903d254c2562603b3f30af58d105e9b5c2b8abb56e2e6978c21ec7b71468. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2206365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf7fe357342eaa4dfbcab24e6ebdee0864507b366a83437ea96947d840b6479. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM3DF2206366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea7aeaec56b643c80f4354ad6be4b99e9cde3e7a46cab6821ec4ff5a0b45a34. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2206368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0109f5f46286fd9fc05ac7c8a06d2da454404b8b750105fb5210453d10bf187d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2206369.