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 0x8b537cb124df5e360f74040b4839ef5eb0598122b860a3e1e666edd55555f844. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18935ff4-0fb9-45ca-a8e9-27794986a3ac.json and https://artists.proofprofile.net/proofs/artist/18935ff4-0fb9-45ca-a8e9-27794986a3ac.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 0xfd099a8dcdbea16737e6b10e41b7a138fabfae84b2151758c04e229ba526119c. 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/DEU550204509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7f635f5555b21d658aaff163b121d0129c050931258a5b3bf668f8a4723996. 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/DEU550509003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48235a9a806de155940163391cd40bcd36e641a4090e6d21294fae9ab76a5b17. 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/DEU550509002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1481dc3f0b37828b3fb1f9a63648571506cc24f321375cff91c145a79dee218. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEU550509006.
Crusade (London Standing Remix by GRENDEL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eb227f62213d9cf7b069b8a4c6db2d6327a0a502933e20dc6e94711856f73c. 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/DEU550509004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234d09c41680c3b515e28959726cb1f7afc3b1034798137e116e9b412add711a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEU550509007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1635823454fd44f525ddb913aa475746fe6e2c8148c95698f7ecbb484401621f. 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/DEU550508201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f6dd14e25386b291440b6abd94d57e7512436cfd9ba3845d59ccaf93cf450c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEU550508203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c669fd4132521a08bb923686fe8e1a9007c2f2270b1c3aa5e70ece415a9fe27. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEU550508204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4293ee824ab9b0042c8df4afca2a76b2543a991c3a4e023de952b2a8f189d010. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEU550508205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21795e5475c7e5df92cfd21ed30d65d2d464c60c5a3ca8fdf6b539baf2e3263f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEU550204501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f645af13dfc38affecf82af3733cd6b36b80cb231bf58d88dceead6401fdee2. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEU550204502.
Snuff Machinery (9mm RMX by A. Deal & T. Schmidt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d573b481ba348093ac31748da6e85e6185ef0d14ae086bec876bcea8a02061. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEU550204503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1736e46b3dc094d1240171140b753e653ecb742c4e044c33b6e1d9995a5a34f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEU550204504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2f3c255833d3d24b39275781e196983b3c4231991e36a9c5f52d3bdc9448fe. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEU550204505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb3d64a4e1fb8cfb9bc7d2a52ded64b2243a706e9923104ac7d31f8eb130c6d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEU550204506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b05bd32aaa3dec63f16a98bdc71b844274ae44ffe13e394ab934b337dbe513. 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/DEU550204507.