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 0x06fb4a44e3c408b07b168cfa285900efc5c8afc0e3aee8a0f9231c54ac7c75bd. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4fbaa9d-cc10-4f51-9311-5feda29f08c5.json and https://artists.proofprofile.net/proofs/artist/e4fbaa9d-cc10-4f51-9311-5feda29f08c5.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 0x9d00f4a71319d0d21427171d36cb83068f3c4b253d085ca44d5922b5e2129db1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/MRVX20109303.
Ances Romance (no k/f "Klāvs Mārtiņa dēls")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d4505c1c77bf77ea39220d9a14bbf8b4be2ac7aaa68dcddbd1c2df82a816fa. 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/LVA051000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5017dece0bc87e8b85b5de268ed73dc9873cd41990f2ff05b993ebeb3d70b5. 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/LVA051000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf796d5019ad9c6dc4f2749fd84d48e06791dfbd352fb483e1d4796a7395aa08b. 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/QM7281475268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5429204538feec0bcd0b9d2526abf1578ddbc04680ebb574be8e311895ad2de6. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:00:19Z), 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/QM7281475270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebbd97adc988e95167ff41dbcb81a802a5d6570df4cb463c713d551ef4ec485. 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/LVA109600227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5f9d28ce04138af04bfdd90f7c0a8eb471a9f9da4d487b1d25fa0661d72ea8. 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/QM7281472639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9eb985a1d721daee4b4582fb2d84be9c1c87183817662c9f359e6c662e28b0. 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/QM7281472640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf95ee6eee067d5b7641cddda8a000fc7105ab8170793d110afbc57d70798e2. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:47Z), 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/QM7281472641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992bb6f4380c472582468e5986d9b8fe886875e0463edd2d1e82f2f0f6b5a35e. 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/QM7281472642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821fa3ae9891080562b14a200f0a202355794c70175941a2e215d09b33480a29. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/QM7281472646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cab48f02d3cfb345ac035bddbd70a4da06fae8e20a41dd738d96eb47275f47. 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/QM7281472653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2ded4e9eafaaa73e9e981f6f2aaa85c40619a3ebb4ba7dd909447679e4ba6b. 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/LVC100500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d0c2b3c38c03cffc884a8c5da04d7c0f2f465782cdd044b50ae89708789162. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/LVC100500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447bcc8d3aeaedd056da470d686268357dc847be29e7060e3bb6ec8e94170651. 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/LVC100500059.