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 0x57f7af9a6f7246f5d8d44647a91978cc1763b3c2a33e57b1b1444aea64b1d294. 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/4063748c-9a42-45b3-b923-f499a605c660.json and https://artists.proofprofile.net/proofs/artist/4063748c-9a42-45b3-b923-f499a605c660.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 0x2dd66a1057b61bf405b7a7a9b276ba4c590182eec1f2740c4037c5ae41012423. 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/QZ5AB2289372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569492c918fd59b31e18ae89f1facd95fa0df448de94bcef6bb72c88c9bab919. 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/QZ5AB2289376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b8bd1f51c7a0db7aceca5b0d8c0b55d9faf63d53882956220e4fe4e5f0d3d1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:15:25Z), 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/QZW9M2214105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6c9e986cb9bf0831cf337ab0c72aab5979f0e83415e4c95ac6ac0485165160. 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/QZGLS2187718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604fb6fc1bfe75f3767189dcc4f14d22b7c0c6468279dfc225eb1fa4dc90f86b. 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/QZMZ92008183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ac89ecde66257e2594af7f7e2e95a0ee8f38c542f8a952eda5ea79621a1142. 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/US7VG1946872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55634c45744c538a217bb413af84526b4e1bb3e4e73ccd851b1aa0dd40847a94. 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/QZW9N2206045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc2070d6bed2110396256ae13fca596a69167c7d3614f42ccd03bb70d8432f7. 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/QZTVM2342185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085d1cebfbe10eba9930a05e47c4fc66c82ea578c5d52466b4f0f62d18215f03. 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/QZTVM2342186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b126c81b0f6b3e6c845009da66316e28a05a286364171af5a0511b1330be35. 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/QZTVM2342187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39fe21e2acbb9fed59d05d8cdb318772b0a99a6e06e425f11a9277b3172e52b. 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/QZNJW2320175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a037a3800a276220bfde5b735fe8487ad38d5aca1c3d768188facce0789f10. 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/QZNJX2364656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfbe5a8d32ffe0e9afeb20604089e43818981ed844ca7fc3d05d0af88fbb400. 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/QZGLS2321591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5b8438b181cd751f0357b0f78e201d692701b9f280f059ff94d13775dace60. 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/QZTVM2342188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f06d6f1d4f8c6ca4c9f7f1a9114b549522376136e988596e1e9e48d3d3cd38. 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/QZNJV2301887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd632d94320ce5df48cec64b838bde9083f2483902b9e4c346701ca523b35745. 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/QZTVM2342189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a037a3800a276220bfde5b735fe8487ad38d5aca1c3d768188facce0789f10. 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/QZNJX2364656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfbe5a8d32ffe0e9afeb20604089e43818981ed844ca7fc3d05d0af88fbb400. 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/QZGLS2321591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00e7501307b53e0fd6617850ef58ed330ced5d45f676a117ddb506415dfbf15. 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/QZNJZ2482871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2483f811b51d43ec46e984cfb0399de4e8f58ef7b277861f17eaaf2e5d9ff78b. 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/US7VG2569721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a23b53d2d9cb9850042565cac397337d82c27f8d3c361669e43c4efb468afd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZDA82042098.