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 0xe3804ea5c52dd4e7f95882b88f19d5919bcb0ea7274c469d8146a5b8414d4a2e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2afb307-8cb5-4299-8ec4-b4ba6d4603ad.json and https://artists.proofprofile.net/proofs/artist/c2afb307-8cb5-4299-8ec4-b4ba6d4603ad.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 0x6cc705b7493ce662931127894b11545632eef8e74b548125528b9aee69520ada. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE5Q52004186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4491595cbbd8ba7f9a797eb1036409821df946ff0c78492db68475d13083b724. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE5Q52100660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f69f8d035f46dd6b496fcf4462189d7ecf5b463bdcbd47052b66a937790526. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:23:51Z), 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/SE5Q52200732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0868b68450441e215a6f043a6ff546d0d0df58badf464c59705f8c49b723715. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE5Q52201016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff9dc41ac51d942211c4a4a7e69483ca3c4512036c9800bfe041eb48679029b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:02:21Z), 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/SE5Q52201235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125c6ca81602a06a5add6e59fd5440259ff9fa146c5ff7be892b39d061fec4f9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:25:01Z), 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/SE5Q52201760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81f1151fe77e600ffab652fed262d48e2ec533e1e51654136871c9be72cbfbf. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/SE5Q52203316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845f941a0afc42a1e7d94cbbb9dfd67ecbba3842638e375ecfa1392f7857c01b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:51:56Z), 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/SE5Q52203126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be0afd52dbe58ae7ae5899828cd1614c2bd7e2b217f93090df6f048ca821ee4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE5Q52203944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1047730185f90ca2d86e36ace327199b282c50b7dddeef7aee455c570f5b2afc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:50:20Z), 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/SE5Q52203883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a2b212da5fec8164ef644b744ba577406b5b984e58e8a0327cd2b612c4337f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE5Q52204220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af4692362f117d85a7d7a4bf61e95a1736eba495b96be4ed908f162856f706b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5Q52204150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a9f7c9fdae6bbc27e3b125f2d661300b3ad14415e08381335824e3c8e1460b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE5Q52300863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99699ab887c118ec3907a799e105612c01238cff2915c575e340c2fb05591aa9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:32Z), 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/SE5Q52301642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b9fc44cb5f0a0341091b71e7d64bd62b5dc50394052dbd8b859f8e96617a82. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE5Q52303187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb45645dd1b5d395132b329e6190234a925834e45e57435e3067fff3dc5b294. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/SE5Q52303344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab653e7ca9ae6684e40080a6be7f5217cebf80c81683563eb1ba63f9f76afaa7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:25Z), 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/SE5Q52304461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fab7ce61959f79726625006baeb68fcef22b015aa784362351ffe9a365e92a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE5Q52500513.