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 0xe4d660416d895c3bbdb39590ae14883533369836e70c4ac50df8a7fa04368304. 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/4b4d3dc7-df47-4343-b547-91559e2c2261.json and https://artists.proofprofile.net/proofs/artist/4b4d3dc7-df47-4343-b547-91559e2c2261.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 0x5c0e438b641d88a349b774871c0a5195a404a73313ef8db8f4015a3a07f9d97d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPVP01412102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450d1cb449f4501cd60ca6e980d5b440bd0613a326e3f0e801b131bc63313354. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPVP01412104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fdae5775753d2c84e5f96b7ea193eba4a1feca05f9057ce30b9c56753d2fd7. 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/JPVP01501901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c56847d06f2a3827095943b0616b00ad682166b656077149e7c2eeb0e437e65. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPVP01508201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a27650594ce2d4704ce51343cb3161475ed806ab2de79def0a7ad3a2ba699f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPVP01508202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca42b06710bbe67e48711e876a568c9999ba5eb905d0f8ca18bb8a7d5e675da. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPVP01508204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cfd82849bc12ad2ddac993b51980b4a202032e428355e090a3b06c54de737c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPVP01508206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7c142d3dea267f40f16e48ccb2e6892609aba609bd5739777f50ec08016260. 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/JPVP01508207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d3802c362f7e933ec4cf4790c1c1797608038c85ec99aa1023781d38d5beb7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPVP01508209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22674fd99ab17f1de88ddb2c1896af3bb12495034781b8aa0b18c966bc0c1b4. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPVP01606001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd90e73f40a080c0dba6a65de0a790763d9ce18959d563925b1349843161eb0. 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/JPVP01606006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da78eacd45046bc284938d600afd64570f73ff0c0bd099b7f38bbb0dfad4c31. 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/JPVP01702401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b0d666579ee6af3b5fe95ab6af89cdaa5729a02b74913f8c50d0d6de912663. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPVP01806602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2bc80ce1c8524d50a5523bea4804261d55db84860e1250a1d3a9e9712291a6. 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/JPVP01806608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042736558796f97e690ccc05ca040f068a1fac6d97c9edf23f29311f06d3e75b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPVP01710201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e498321aef40463d89f0c7fd473858da7f0661809a2e367cbd3ea2714efd649. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPVP01813203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb118a8688f4d46ed64845a2171d0602cd60c88fbfc10b9d5257483f007bfcf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPVP01813206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f9a52b9e3f0c07f306659448d04d154d9656cc6bdde0b955602d0e4f604b05. 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/TCJPD2430993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f9a52b9e3f0c07f306659448d04d154d9656cc6bdde0b955602d0e4f604b05. 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/TCJPD2430993.