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 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 0x85e78b2c18e79589cd3aa9c960bedaf05d674e8a31d062c0bdb136627d05e9a2. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/738de724-6d28-4b9e-8735-55ef7482cd88.json and https://artists.proofprofile.net/proofs/artist/738de724-6d28-4b9e-8735-55ef7482cd88.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 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 0x8aba74b03b67fceb689a26c8abba77f495facbfaac60006e86a32cabd989a0a9. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZ5AB1908634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775184adc025bbfc625046c89e4a6bed27d828c791c614e4aec706295849d53e. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZ5AB1931718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0addfed99d1225abc840b1baee3faeb1f02c2f60893eade55fb21581401f13e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZ5AB1998054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f03272a7eaece0cdfe0e857dd9eda63400a396240145136045c464c5eabb92. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG1983853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a91a131546e47450558752a93c1596f66a9f6bee303f156b2278062e74f61. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/QMEZE2091206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3b37ab00a661f8af1ac57f313bd0e06bd01dc1853a6f001231f9eee3d046f7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/UKXN22085467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124726feaa32954f2c9c204ae7e34ed30253ef65e4d8bb3dc24ce19b7418f83. 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/UKXN21947209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77ec52315d839eb969efd4a79d5d22e295af48ab4bac1aa51d4d834d85e8854. 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/GBMA22172270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46231104cbd5c9bb4681b3984caa2ec39ed871124180e93513d19d6bf300b13d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GX3Q92077996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ef11869d057577553042646501ab9cf8411b9c7bbd09befd3651e37a2ea7bb. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZNJW2124120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2cfb9abe66edec220fb125c585d91e0cc8b29fc8bc07fc43d0096e33001d85. 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/GX3Q92188208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc006b1b6e9d5d8ff3e99705c22a3b83b65c27c9b9700473ded5cb647078ffd41. 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/UKXN21916724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed7096c303975bc221d610229408f3ab1084a516ef8a05518c648757c0dcd66. 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/GBLFP2243736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b83fa6202c294272736fb374ce10b5b28ddcf51287f92122362de44df33294. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GBLFP2254791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2f47df2108649d44c3755028ebe93078192d0a6a56a70690d2d19a2e9a5a2a. 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/GBLFP2270685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9be5130f29f40f2f7018d7c3e3c17be62feafb9848820a8064aa3560834056. 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/GBLFP2275195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafa7b4db95bf08475d778700655617d6d70197fe581188eaf303028d2a8a848. 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/BKRA22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cf308aa71ad31971d56e922441af47139c8564911f8f0584dba2abf314a41e. 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/BKRA22200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a28c6e1e38d1f5e8ecc78044f602a6ed0d5aaa22115e08dde97b9784ed49c58. 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/BKRA22300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b931799a0b8d1d7cdc0962605126249d21821b1e59237a9fae27798abb8927c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/GXD7V2566477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae433f08c063d766718104eaeb64c75da56ca8949f12f26bfdb8861fc716db84. 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/GBRKQ2584228.