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 0x820bed983c66b684c4c5d7610e9dd1e6c200d85ac9b4b8bf0c11cce45d68d8f2. 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/56d07461-2f03-4428-91ed-e7ee9ec6ead4.json and https://artists.proofprofile.net/proofs/artist/56d07461-2f03-4428-91ed-e7ee9ec6ead4.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 0x0e156bb81b389478a999a94134d16a716c28c85c29025370e11568e7a895c6af. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPLR2159603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc7fba2efdc8bc66468c786e9bd187a7b6150ef049a40bb6b4ffe37db9b9253. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZPLR2159604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4ea08b1240b925606c238a81b3c5e7e94f9e254dd73ad0700b91009af0cd20. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:01:19Z), 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/QM6P42211378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb02c91c55d46108dad8cc2a0ef02c00ab264c5b2f7ee0259f49332cfb2d36. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM6P42211380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4ea08b1240b925606c238a81b3c5e7e94f9e254dd73ad0700b91009af0cd20. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM6P42211378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb02c91c55d46108dad8cc2a0ef02c00ab264c5b2f7ee0259f49332cfb2d36. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM6P42211380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b190c3e34c73eaa00bb5c9056027019d53d1d84229ead64eee26baaa363b2d. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:26:20Z), 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/DED832400541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa315dad5615da4a77fe68ca812b52f594ee104d9c4dddfa7ec4d4ff071734b82. 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/DED832400548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b190c3e34c73eaa00bb5c9056027019d53d1d84229ead64eee26baaa363b2d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DED832400541.