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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69581d2a4f2639fb9ebe4712886685f9090f01cda34b44a1599f09ea67bea5df. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73c13eef-d94c-4da2-aea5-fe351e4ab65b.json and https://artists.proofprofile.net/proofs/artist/73c13eef-d94c-4da2-aea5-fe351e4ab65b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb631a5fd501b104bc91e442f9dd6c164dc02edaadac116260f905361e50a90ce. 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/QZTB92327168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9876e4781d2d10c876b034f58de312d3bb2e4d2a59313f429e1966478e2ac30. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES62446377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dd64c3038c2a0ade265ec13193ef087aad1a1ffdc5c41cc16595b35c67907a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:34:44Z), 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/QZFZ22523579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d9f0c66575a37c5b4df5c66b5bbbf9575b455ad8fa16465cf3a36517ea1ae3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:40:33Z), 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/QZFZ22523578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad03a37370a2890f558782a1bda9ce35ca7b207124b728deaad85bbe4a324b7. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:53:37Z), 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/DGA072424366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba665fb2a0b726599c644767ef568c8e198f639d16e83bf01bac284a296c951. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DGA072424368.