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 0x4b30de5a6607c17f9e18e7e668dfc392cd537cfd7477ad3e416d4e8c7dc8ad05. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e837f58d-d1dc-434a-aa81-61b148b41a3c.json and https://artists.proofprofile.net/proofs/artist/e837f58d-d1dc-434a-aa81-61b148b41a3c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Italian Song Nº 33 - EPs Collectors, "San Remo 1959"
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 0xce8e4efa514f4a5d5e49d4edcacc2173f34d7cb45fef9b97badea897a8e90e38. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:46:41Z), 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/USA370995497.
Vintage Pop No. 199 - EP: Nella Colombo En Español
Vintage Italian Song No. 63 - EP: C'é Scritto Fragile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0c5ddb735262c58220b635f719ccd60fc3ff43c8b4006408dec1460e211384. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ES7581300561.