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 0x273f06c2fb527dddd06bbfdb260bae377ec898d0f00414d97e6a96c2092f780a. 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/882acb4c-7f29-472f-8f07-51780e67d671.json and https://artists.proofprofile.net/proofs/artist/882acb4c-7f29-472f-8f07-51780e67d671.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 0x7c7caa8f8575e11e3fc0c8d6155a447f2f33933394d4463634f8f9393ad905a5. 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/ES71G2401401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6c7aa0531152e03c0de6ea4f8d8dc278106c39bfc42e15d1f0d7efcff5c0f6. 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/ES71G2401402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ebd8d4ad74f98a27ded41e82049a390aef75f4e1c16e2cf3f842d3a3d1523c. 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/ES71G2405770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d429a4870e1bc64a45ac5d1ebb259d917fbc85ad50cada7d879cd01699681ca. 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/ES71G2405771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb34d06908ab861a24db15da7902e695e951cbb54a48fc7717e6ad5b284e19f. 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/ES71G2405772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01c5df409350a52d641836dfa05ab8fe89c65c857d332b5979514ae6978bd54. 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/ES71G2407265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c08467d4a472e6936658c141302b1c0da6deaffb5db7d3d5932fedb30b12c10. 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/ES71G2407266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9213b270592f02162aeaf5fb1472fc2d92f5614cd223bc13a3edce8e07df99cd. 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/ES71G2407267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0ca08d87f4345409191b2d62f94dfe3178b99c8e8130e67a27b4b76d29e0ef. 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/FRX872109541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76addc5251f4275199b2b1feded1208653ceb825f592ff1d19519443a266c78f. 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/QM6P41834903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9d87f1a5cfb97583b46e701c5b059b3c59ea41b75361313504e28b0a1ca1f4. 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/QM6N22010170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7c4e325299b18feeb11ac40bc2f6c27045e2023e22d35dd51bfd998da78a4e. 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/QM6N22010381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000b85773415025a4b8c1effd462a498080e675c2fe6191356a882a274e855af. 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/QM6N22010144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb6c56adfffbeb53b5d04468d1f05dc1093799b6db72ca8ce0d1130f9b9aea4. 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/QM6N22010145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa138ea07b046aeeec11a966f07973ef49d3ac9328c0c7cce255676b25caca59. 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/QM6N22010146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3923d1622f1f11149cd10cc6277c56d8f857e677381025691367b635e9f0bdce. 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/QM6N22010147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49048543e429a26078cde5f99c6c13e8173ad048c5ff36c7e611f8e0f82c809a. 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/QM6N22010148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe1385d81bac4f45f92fe4e451f13c2594392cd628957c66a73cf76ac3fb742. 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/QM6N22010149.