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 0xbaf15dfaec03afe80c6291ad2b87690ba670d150fc9df60cdadc62c1d7e7d8b6. 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/50086c01-6d9f-42eb-8281-b35424053fcd.json and https://artists.proofprofile.net/proofs/artist/50086c01-6d9f-42eb-8281-b35424053fcd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Parting Glass (Live At Abbey Road Studios)
The Parting Glass - Live At Abbey Road Studios
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 0x3248d331cdefb6d89b3cca8a07c2dcdf7ec5f87e991a642199dec18188c88c97. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/IEUM71800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9a93023407fbf2d00a62c46d56ca830e8b7f3748d878a0fac86b78d1c28739. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKE8E1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5e895e689f08842ade0574dad7362f78ad0404102ee9348941e6cb2a3cc873. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/IEUM71800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8a5ef2a99185eb71337dcacd2e9b2b52b7741084dc9a833f7c8e5cd44bac0f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/IEUM71800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc92ef8a974d7bc28c11cdc412b13a7e98f5c38d5f7a9f7a1d9fc3043724a613. 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/IEUM71800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad445f713825b20dfd40f1afb2d93fd97249e0db3597ab48b15927c27dd806ac. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/IEUM71800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d96fd995ebe007eb42b0ca78b63066cdfad35dacebdb0afbe34370bdfd8cbd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/UKC9D2576001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b48a6502754a4b7bdd756e439a718240a61fe2190dac38046fc41ef4ef7225. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBBA1800601.