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 0x3fe95ef5c0e2f05f25e96bb3b678d1ed8dbd4a2a885fbd1f6bfa7b3ee1a1b667. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/318f9efa-c3c9-4151-8f80-be449dc1f56f.json and https://artists.proofprofile.net/proofs/artist/318f9efa-c3c9-4151-8f80-be449dc1f56f.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 0x4531e46e1380a7a836870363edbab59458ce69552c9f49fe94918237a7d20455. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/FR6V82341772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923c4472353426550f03cbbc4ef0ca5a5c4e371b8a6a2d015fab15d80e073308. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR2X41589372.
Grand Kalle & l'African Jazz 1958 1959 1960, Vol. 1 (Merveilles du passé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432f5923090e8eb4ce4dd4930787ae9a2ceb35ff9b9e5d5c18b2a0270427445c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:41:12Z), 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/FR6V82321093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a81265324cf529d184fc5f091a25f054f93890b570d05b90e263c401495ea9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR6V82321103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da4be2847cd2d14f1aa8247df9f0463f626f38f383760af54a0d93073bfcc1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:59:47Z), 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/FR6V82321105.