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 0x5d65036a10b58f0a6256d4df88ca73f423a5285ee3d0c1cd8cae7e3f8d68f56e. 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/9091e89b-ff5b-4a48-90fd-1578b351279d.json and https://artists.proofprofile.net/proofs/artist/9091e89b-ff5b-4a48-90fd-1578b351279d.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 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 0xb56142af3d4e503ddd06730272b95b53b6651d52186a5f2f4f0bac6bf5c6b85c. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/ZAA011300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d47b7ab888f74f6eb1d4e19acd959cc6520e740cadd6d9db6def2e2ba8457ba. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ZAA011300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b40a514bd4e0c22ddd82aeb2b32248810d102ba8e237e156c1a3afb47f70989. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAA011300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8424951ae0ee00d5a2c7d116c61fa3a2c5e988c79586624a7d525ea3f4f547. 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/ZA71B1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2960a6035dcb0e131217a0b0c1c97ad0553c09816a23644c32203c316b1dbad. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USHM81946781.
80's Pop Shop Medley: Safety Dance / Around My Dream / Break My Stride / Tarzan Boy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369edbe1da3fc89417e82501f1c1028525909d49540ad450d6b1ea22ae0291cb. 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/USHM81946784.
Medley: Midnight Special / Have You Ever Seen The Rain / Proud Mary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0259a35b73dce0e3211ea8312b3f1032fde19a5ff8e2af92d5c1e3b1c1b0b3f2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USHM81946786.
Veels Geluk Liewe Maatjie (Footloose Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc684595ff0a25fc317709bb2ccac3db40a7807fe2bd60f84ba5207cef148987. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/USHM81946798.