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 0x81852d9cd3694f067c2b89902df4e6553f59a5872525d641a233cf37168dfca4. 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/3e911e9f-2133-451e-b7e9-1a57f61e3a3a.json and https://artists.proofprofile.net/proofs/artist/3e911e9f-2133-451e-b7e9-1a57f61e3a3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No Food (feat. Linval Thompson) - Single
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 0x75b5fc1e7b624aae03849ab56f65a478bebb5efb93bc56a8d27566093d13302d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FR6F31505430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85932d54db362dde18ff52c4fa51ca3084fa6c74aef503d1f5d24085ef09a284. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6F31505440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85409d3303133ff36d8aa0f309f6421cfe8fc0bfbfb06730a1659f8cfd1609f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR6F31505450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a52ebcefa2ace7d94004be853d4bd793e97e89547d452889f1aac9cf8c0fda. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR6F31505460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5379da14722e3561f13bbecf373351ebd80ce38031a015ad15333a302b30f9a7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR6F31505330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98641e335c7eb699cf29edbf7a9d1ffc720d2bf78fc7d0bb6b3a60aeeddc1a2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR6F31505470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cb2660897a944d8157e9f7d8f349ace51f31ca71c2839e18178b28ca342ffb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR6F31505490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2393fb3ad2a73be88a935aeda95e5109249851bebb0b0d73dea97e9a9da829a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR6F31505500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b6ede1d817c3f4a7e472c8240042f31f4bfb063e12fcbdd030a254f78ff2c9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR6F31505510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf122fafc9d0af15224cd7a4a50d8b36cf8221f98a7fddece4ba071862410c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR9W11104248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69b4c5fa76fc745fbaef7fe5aad262f0af68e6b1581088610f32947331c905d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR6F32102090.
Anniversary Collection (by Stéphane Pompougnac, Charles Schillings & Ravin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6001414fa2957f89e993bfa053d664f5e1baded512be19e7bae6202a4132088. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMFME2175722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a558d8d8e6c297d696636aa9989bd0747527c7fe6656c1a2c692396ef244936. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR9W11107685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf122fafc9d0af15224cd7a4a50d8b36cf8221f98a7fddece4ba071862410c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11104248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679649e679f6829506a45c05409debe49abc5a72697d6220197ea093052c870. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR2R01200043.