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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e749c16250053fee52c07d98fdc5e2926bd50b925b592a1b03ca81f55cf619. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebd6e6d5-385a-4a29-b26e-18607b54d2c4.json and https://artists.proofprofile.net/proofs/artist/ebd6e6d5-385a-4a29-b26e-18607b54d2c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Lounge: Fifty Moments of Jazz, Vol. 1, Pt. 2 (Original Version)
Piano Lounge: Fifty Moments of Jazz, Vol. 1, Pt. 1 (Original Version)
Melodies on Main Street - Original Version
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c7f698c5d679f67112a0a2fafe6e0a12ea462b868dbfd98fa0edaa7259d124. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USX9P2457890.
Piano Lounge: Fifty Moments of Jazz, Vol. 2, Pt. 1 (Original Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9222fa0a9e628cffdcbc6eb96215608754dcd6c1add960fca149428fe95a939. 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/QZZ7T2420802.
Piano Lounge: Fifty Moments of Jazz, Vol. 2, Pt. 2 (Original Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa917dc59788545caec7ac5105c6ca18df8ce1a39287b8c8115e0fe3052824b5f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7T2420938.
Piano Lounge: Fifty Moments of Jazz, Vol. 2