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 0xe7de5f789d6a9f426eac32fc5a4a6f8d8298dce45eafecb214039aa15825c809. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41adf248-f241-4eef-a878-d7ed606685f3.json and https://artists.proofprofile.net/proofs/artist/41adf248-f241-4eef-a878-d7ed606685f3.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 0x66afd7d2a116b03fd27acf798ddfee8fcd1479623ef32100e07161e6ac5e6dfc. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USY242437161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eb2a45264d0c304b69d9da369bc8ecd394ee05b64091ba49f07b1d25d523e9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USY242437164.
Love Is Here to Stay (Arr. John W Duarte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478980f0236e7da0976b59314bd88e9933c0ae9517712290307467ad72bb95a1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:14Z), 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/USY242437167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466b58896011284bbd0daaf8dd440c6d2d6dcb1a4d067ecece2b996b2063ea2a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USY242437168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee8fdce56d8340d14deb924fb639f7694fd815b9fb00892be0dd9b5346588ec. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:20:55Z), 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/USY242437169.
Long Ago and Far Away (Arr. John W Duarte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2d9e535c944cabf9edea5901212fde102f69b3ae9ecfb817dd0dd9a8516427. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:41:31Z), 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/USY242437171.
All the Things You Are (Arr. John W Duarte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dd6b93c542bc8b2ec2bbd0b35b3bc9fc4198ed1dbc43217818233d0e23f812. 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/USY242437173.