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 0x34be0c1fb673fa8a9592e7f7f1ba6e280acac1baa66789075187040499440905. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9fbffae-8b4a-4703-a305-e5ca7ffae914.json and https://artists.proofprofile.net/proofs/artist/a9fbffae-8b4a-4703-a305-e5ca7ffae914.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 0x4fdbf24b1b752b059832e9c735d3861a0e1c4a3e3dc34ec6afc903cb58fd1c8a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNWU2104130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d3a7c41c886c6c7ebbbb2a76c94f2daeb654de9042b58b4aaa1603975dcfea. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZMEP2087101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a44876be9eaba01e4237a8c67c3dcf4e4274af282e7e5a4cb8282111ee594e. 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/FRX762179748.
Yosh, Vol. 5 (Mixed & Complied by dubbleT)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e87e5df37ef50461812cedaddd47428657f922ca86d575a9946519f9c30f0. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FRX452155352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86989135c261bb2ad4698c042ca41db993f0aadc3c69533c7bd5b6c9392fa68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA052024909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f531254240a6a950193cc016c27d8b1aa6d842c16d836751148a7fc2a3c14f. 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/DGA052024910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982734f766b8aa7f323e3dd494b8b53b74e99ca5a52d60cd354bb44ee7dec4dc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DGA052024911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923e244107d173e8b28e3bc89d2e034a633ef598dbe96cbd3a1132ab76b3be78. 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/DGA052024913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe037ad8a5969349fecd70b9e9529241f8944aec324bdccdcb2991645f8c3092e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DGA052024914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafed02445f2109a163f12ea7172b8580801c455f2eeac81d1a26508f0d37ffef. 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/DGA052024915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dadd5e4ca8e989fbbbf0dcc725bf65e9ab09ccb633fab40b6bae022ec5d7fe. 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/DGA052024917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef8f9bb4e7b03668bb5d171ad3f35b4f5896e780f9609aca61f5ee7238eeac4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA052024918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7844895ddfd61a871758bdb11347d0e7e854426902a1d7cc0430e226a9307a0d. 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/DGA052024919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1dad7700fba02aed2300fab7b69fce144e77d12924eb49714632509b402f53. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GB8KE2058477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa0d67092c917102a19cf59a69cbe0dcb9b8e2b2ba8fb4f1c856ce78e09cad6. 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/QZMHN2029894.