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 0xb0a0f97e37ebb3148e689b78c34f8f2cdebf355d1ab22188f7bb2150c7fe7743. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f83479c5-2e82-4e24-b64f-5e77945425f2.json and https://artists.proofprofile.net/proofs/artist/f83479c5-2e82-4e24-b64f-5e77945425f2.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 0x3f859fb1660d73dccdefb5670b7980ab79812f90237d50f1e4ad72ad38fe8cf6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:54:19Z), 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/GBSMU3946615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d303da9702d077b53270e3ff7e1560c4a1b87f67ccdce5d69a3fd8791f48350. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBSMU3946616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfee0344a68ea3b9a67e2c4bd558a4e2523b2d21cce2954fd94ee9119118c84e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU3946617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c68ca87abfdf22323dfaf78e4b79813b76cecdcd89d1db608a8a11246b8821a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBSMU4881746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d26489a3c86aa610690f0fa369527fef93b67e6e54be1ba0e2cce693c8c450. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBSMU4881747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703c70384e78bcd9e41fccb59808832049eeb5352564aa18a85d547430bb1126. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:43Z), 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/GX3HH2138914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3874219de3612dd3d75337777260af8c084328f4162c4f971a33c70befb30ec. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX3HH2138939.