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 0x8d2403552f31bd8ff2db93126fa508eb0a0ff79e4567f3ca83e01c3cb4cc44b8. 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/6b8be35c-977c-4800-8bbc-0d435c7123c1.json and https://artists.proofprofile.net/proofs/artist/6b8be35c-977c-4800-8bbc-0d435c7123c1.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 0x976a6ef8d5d80ed309c744ce8ebee5542849cb1b54bf129003f2300e426183df. 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/DEGD51100255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0892ae2ac0798d912c8c158aadc15b2cf705d1f783733f7e921d62e0b1351ef. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DELI91400035.
Do You Read Me - Thomas P. Heckmann Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0d8563281e7c8bbbf99bb350bc84d7970bee6825806f53fabdd38408cc7054. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR10S1599357.
Do You Read Me (Niereich vs Hackler & Kuch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f5a6167eb0b83b06923b2ae1898e9a9472cc510c9dc783ec9128e68a6d680a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKQU1726817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc52304826094ad425691c51af555ff62693c393636b497eb8b01bf0e7c8d8a. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/GBKQU1928515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc576e909e7cdbbe5a30f16d4e5a5dabc822a3fe2376ba2b4244e59184f214e37. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CA5KR1929353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d47b5930fd530fd194d8d25b23340d08fd8ac968b1280fc8832fbc5490928b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKQU1961943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531c1c3a311b2f557f27216acb3eca2fd1e402fd9a4bd882b681148ef46297b7. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USLZJ1987364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16827fce4452e70a3b9ed02f75d3980f9a5c3c968780f6a79e00b3a3f110739. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKACT1915100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850dc5839e035e2ba9b2b36837b4ce34cd1f690825de71fd59afd361e845f678. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBKQU2008102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0cbb521a1544d3929524315a8ba4f6b452ae4ce3c1b67e4eacc258d6f90ecd. 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/FRX452364581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0924fb4e4821d178d5d7dabb897dd9ae658441448fa07bf6393e621e35bb3ffc. 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/NL2QC2101100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa321cc0f010ec085c4d62282c367cc425506bd908fda0eaf7380ae16af5a5952. 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/NL2QC2101101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53f18b1edd19923acba14d0cc8a29f815a27f382f7784ecc1d0fce54a1ff1a5. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CH9742400015.