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 0xcee372fcf3b918b2a2209f40156f5e673b9361ac4e6e4ac667009ee7f4e08ad6. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b2355bd-35aa-48b1-91fd-7e697096bb95.json and https://artists.proofprofile.net/proofs/artist/8b2355bd-35aa-48b1-91fd-7e697096bb95.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 0x48f89653560087ba85dc3fbb082d3c69c06116094dede65df349bf8cfe55f507. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBPQS2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34177c51dda0fc7fc872a33b70124e5d864e7d1ba9e4cad062a311b17d46819d. 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/GB2LD1900219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811769379ec4b8e743a30234fc8934a2ce41221e43aeb20c42dc129a281f9086. 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/FR96X1892131.
Ocean Drive - Purple Disco Machine Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48469c93fae26298494fdd1234f0b1ce26dae60f77d78eaf6892adcf067c673d. 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/GBUM72003102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8723952e22deac1e1b4c00440157715ed311ad6d91b214fe71a8bdc99b15f756. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM72000265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fecb23c7a5b551f356b35704df974f03a0a0162cfdccfeaf53de23996d07d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM72002347.
Nightcrawler - Illyus & Barrientos Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6056c7b1f3285e1d4f30792f3b12205c742c3614d5a022a660da09f79b9906f4. 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/GBUM72002909.
The Power - Vintage Culture & Volkoder Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336986938a4133422d3ff8d30d9daa38055b90faf3f55f4f6570cff84f824c9b. 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/GBUM72004354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36cc269e13f3f1915938cab9c46096e2afde53325b97234ab2818c30e984569. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBUM72004364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb5e1842677437632e2dc62eb720253dcc22af9d660fd55ef4ec60132de5f37. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBUM72004356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736ca19d275e0c8f0693315a17e3b9a003f85423fa42d271b9a1852479976f56. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM72000477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92a68fce0343cebcf6a98687be06f9a40aa133604399fc4135e85d7a9ff3e97. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM72004358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c171c4a89fd15f505b1f95baf8250dbb53c0d123ada7113a8cc0646cf473dd8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM72004360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda42d799de1033d8692776c2ec06bde302858bac8abe9a23323ceb1701e21112. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBUM72004362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5a728d316a0b43df82b5e113261e3daba27024881121538b99f2c16e741e04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBUM72003905.