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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee731f0adf157d62552e75409e07461554b3dd993a03fadbd5fc5d0c4b7f99d. 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/adf388eb-aff7-4286-b47e-32e4497981c8.json and https://artists.proofprofile.net/proofs/artist/adf388eb-aff7-4286-b47e-32e4497981c8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92bae14877a6dfc5c59a72eaf24d2c565094fc6779ab2f67aa5d8776bbe6ea6. 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/FR26V1522788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0bbc5391e357385f77f18933bfccc67afd780fe7343af46a637b5898bed15b. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:57:52Z), 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/FR26V1522792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9ba9aefb7b7f5853aca4718f2980e498c68b58a9c4fc0ec19d1cc4d22e1ebf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6541630350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f4a04179a2e7ba351fbf452cf938e127a2cf952ca34ea3d5410c216543f676. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6541630353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd87820cb14949cb3eef7b6bcdf0a4294f355df69f1024223909eba73a60647b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEL211000799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5553ef9a7a4245960e73f42539612dbc57243d03819a66e403df3031998c36. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEL211000802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7d1affcca9393d1a337217489269d54ec757a275727192e16f09b4513f47aa. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEL211000803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2434a4ec2f297e671a3992bc06de4aa53756e79deb8e85f0cbd5c5cdb36993. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEL211000804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc233708b4769a03b14b431431b53514829c0353665671b5766a67ae8d229201b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:33:10Z), 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/DEL211000805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ba1fac328375b620b7a9a82179b633ce9b5bc7e9a15ee9e81dc614bda7517b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/CH6541988262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef043d8d5d94e610404907f4fc31604c2c688eb3d4a4825d40c6bb2e180ec37. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEBL60675084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40186922258d75f4453c8b329cb479ea14bce81df727f663e580d49d6f068fc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6542050683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a63c9e2adc7ed3d5043cc3177bd6158de109db633e6b00863720f5de5fb63bd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6542140684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34f5e2f97bf009095d3df1ec485b412ac95a794870d3c5a93954346d2180ac1. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/CH6542178845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281d1bb635ee1e410aa4ec4c9fd6e4ef5f2bb49ee10b047ff5eefc6dc159f34e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6542189698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9141747fc0409c5b613b2be57c022d47335c829915a3deb12d08491e5d843d16. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:04:28Z), 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/CH6542281444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a61c4d3491bf3ec21fadb4ca139a99383a44ad2274e5cd42eaab57d1736679. 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/QZTB32545641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc46c38ef5f2701bfbb04f81596d670bd570969bf1b463d9e2e541cbb4af6db4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/ES8741603105.
Mountains - Stefan Erbe's Small Lifeforms Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc635d92e471d733f6fb443d8db3e2dd6cd8ba353865105817db0b19a9a6997e8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEBG62105214.
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 0x2927470c3cca83b66ea0b93df1ab87fc847894c151dd7e3ecc7cd39282777e4f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEAS81800025.