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 0xa0786bc3e7fe34961c7301c16a2d40a4c58c410aa47a90b58008c3de33ec64db. 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/d952b0df-c8b1-4509-9e29-3a2dcdbabfa8.json and https://artists.proofprofile.net/proofs/artist/d952b0df-c8b1-4509-9e29-3a2dcdbabfa8.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 0xab49d6c3386d73e6f1b605e3b57af46e78651a4008a74ed570499b9292892ea8. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/QZMEP2154276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72d70a5fca2728546dd693f663c5c2e80023fdc73819a00acdd21ca0e03017f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:19Z), 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/QZTVM2115285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7175bb4031e1bb190982ac541926837a8b282b71bbf6e7af1f51c66296fcd3a3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:02:55Z), 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/QZK6J2296358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e73bbb085ae1ae5837fb7acd7c883e17335fd3345ddda8edbc80106e4050ae. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6H2404823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526a37f7400438aea9dadc6960b9addf9afa46e56b693b322a3fdd24160153e8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:06:36Z), 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/QZZ7T2409815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19debed76beeddf4ee4ed4803eae786a0f415f5fad9fdaa51a4d9c8df6f18869. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:52Z), 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/QZZ7T2409817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15238bfaf43858e2c89ed249615b87dfd0b875fbac4b7365f9dcc620391b16dd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:57Z), 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/QZZ7T2409818.