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 0xf48a2d991c0711ab7c1f2d3ba7e9731a06f3a0ebd88a3a8be0f56c7c298191c5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54e3a07c-1cbf-488d-b55e-56756176e0c2.json and https://artists.proofprofile.net/proofs/artist/54e3a07c-1cbf-488d-b55e-56756176e0c2.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 0xd3518a4db3d56d28c85a60c3d29c82a7359a014c0a05c31a3b07abf18339e634. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZES91856650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd95a57e40991c006d80d268123e94d16801ff6e62d41f1e154ba29996f0bde6. 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/USA2B2059578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd95a57e40991c006d80d268123e94d16801ff6e62d41f1e154ba29996f0bde6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USA2B2059578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3740c67a4fcf512af8325c7ea9e5162111759207e1f63c807829e2761ba80fe. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:45Z), 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/GBRKQ2133143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0e6c1ac138d1a66fa9cba90bb6aafbf72a1b37a1db59eae75c153980a0bb77. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:20Z), 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/GBRKQ2240540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bda05882f4122c862ea0b517f1de489969cf39fdb27ed3febf70e0947aaca2. 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/QZ5FN2342129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b3b930976334034e8a3bba5eeab4e097141f7ac8c2a1345d71ac104569ede7. 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/QZTV32245338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc057c77c9b323c20c436b775dcd6bd531f3cdf00a38d2222a25eb2e9ef9f4b55. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T04:29:36Z), 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/QZ5FN2342204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5fe0d8ccfe6e9960333c2b732d06243d65928d16b3c3f8d8dd3b7258cdd0d5. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:33:33Z), 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/QZ5FN2342439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa38f861793149be8c382f06ac596688073edb4e4c1c8fc3025eb95c854287c. 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/QZ5FN2343050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d353076559daab08bb5a942f861c89c816a113881e434e163e86a4ae18e8cc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:06:00Z), 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/QZ5FN2343176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299ac5ccd4298c2dea41d11938c5bc6ac161414566897be39d084f20455a9758. 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/QZ5FN2489013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e2a16b74595e346c2e4256d57d27de3c5e3f0a19048e2c12c1619fdfee763c. 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/QZTV32417937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eb38b6300afea967583b2a9fb6401d410b03e47428029ba5c1c07041ff6f18. 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/QZZ8A2418821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2933c5d045d61ead6be4c43e4de3701f49805720cab2cd6017a0650f6a4fce35. 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/QZSYP2457252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca8060f6ee7007bab4229856c26bce5ccf0587e4b6a1d0e16edf634ff1c9eb0. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZSYP2534050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e2a16b74595e346c2e4256d57d27de3c5e3f0a19048e2c12c1619fdfee763c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:46:29Z), 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/QZTV32417937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299ac5ccd4298c2dea41d11938c5bc6ac161414566897be39d084f20455a9758. 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/QZ5FN2489013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5366a2fe9cb6fea0adfaca1f191e18fe609b8e002bc0cceebb97ddbb8c6cf9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:05Z), 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/QZSYP2546216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299ac5ccd4298c2dea41d11938c5bc6ac161414566897be39d084f20455a9758. 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/QZ5FN2489013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2933c5d045d61ead6be4c43e4de3701f49805720cab2cd6017a0650f6a4fce35. 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/QZSYP2457252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a41993098e19f81d16c4842b2435c245440f5715618a82abc58758e66c8486. 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/QZSYP2585515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5366a2fe9cb6fea0adfaca1f191e18fe609b8e002bc0cceebb97ddbb8c6cf9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZSYP2546216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b1f1998e75a8d831f34d5e23046e4fa6068c9c8f424f311551fd8258802f8a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZSYP2525626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e2a16b74595e346c2e4256d57d27de3c5e3f0a19048e2c12c1619fdfee763c. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTV32417937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2fd3927118a412b9e815e01c727de6e8f732488bdd4e5d19c32b75f424ecf3. 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/QZSYP2575869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a35cfd705789077a6b8e38ba3bd2ac626329565b9bd2dd2e53f4c5f67966166. 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/QZSYP2557661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82b9dc94eb4e97ad8fb19a48b3dc9d920af6787b00838df2370991e81d64a76. 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/QZSYP2552987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ab18ca9e2677011186f9d3c9e5ccdba1d49a3dbce82d013e1257cd813e9c2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:24:50Z), 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/QZSYP2504120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1bb5e84189115fac8bcb36911fe1e6e6453d997f20a513ab8624fa6b4ea63f. 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/QZSYP2576760.