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 0x46596b8ba3b8159b5d0a672062ed3b88ca5eb201f849c64c80d14f06637fd8fa. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5aabee11-1b4a-4b45-99fa-e9944f1791fa.json and https://artists.proofprofile.net/proofs/artist/5aabee11-1b4a-4b45-99fa-e9944f1791fa.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 0xc1e0cacd4d061669aafcc08c37a73167d1cf15dea4f3a8671cbe8d4617ee9fbb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:20:24Z), 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/UKEEQ1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e99def8af746c6f09bedb985910542d05c60b285a23403b32f68f35d8cacc9. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/UKEEQ1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2abb9b9db614993a91753c2a2fe72218577eae2fe3e5e2c5805fa735f1dc47. 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/GBBTV0800988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b8ce2e471c8809580d6db05167028e40539726078c0eaab51dd58ab20ee992. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBFBC1901770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711afa12a3d3047bb9099f0d14426ec13a66204f292a5fb12fd088eadb062d56. 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/GBBTV1201599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2abb9b9db614993a91753c2a2fe72218577eae2fe3e5e2c5805fa735f1dc47. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBBTV0800988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711afa12a3d3047bb9099f0d14426ec13a66204f292a5fb12fd088eadb062d56. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBBTV1201599.