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 0x425fe8a8399a8adef12ad022aff22180cbc71a40060d15ce9c921d3525af8cca. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/164d2506-9c20-49eb-b5a9-138345c48a07.json and https://artists.proofprofile.net/proofs/artist/164d2506-9c20-49eb-b5a9-138345c48a07.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 0x11050eb8f4012ca2d69711d80d3fe6e2ce44e67ebfe0a40d1038366ef59172cf. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBACD8400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3742c4f14297e58bb1aebe9b2931361f86af9eacfce7e7aa747362e63cfea3a2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBACD8400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa635563c3f31a65b2f9316341b11126c6a68335bf32ccaa1fe9d65d77eb290c2. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:31Z), 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/GBACD8400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa18d7b832b1a705e12d913c38afddf2523cc07ad04edce506df08ae8196450. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/FR6V81581153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81394887884bddeca8cf2898cb4b79399d31886ff5c0aa933259a87ee7fcf80. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/FR6V81581157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd247cb7350642ffb8f8c9f0ec358b48facc547e443176385d5e5f03b7bd122fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V81581158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93eb1b71c74ba8324e8e3f9d907a84aa64e8dd4531d11004f13cfd88bb04e61. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBACD8607601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f5dc14c588be8d7a1f7e1e4d0d26a7b3565c0a3f062d302e5fb78d1b3f312e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBACD8607604.