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 0xcef681abcb916214d088304d4aec091362a642ddbfbb4a56ea72426a32c7ebee. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4a8b820-d9b0-4041-aa3c-0844235a4d8e.json and https://artists.proofprofile.net/proofs/artist/d4a8b820-d9b0-4041-aa3c-0844235a4d8e.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 0x7852f09d1191c327e509504f37ab16bea67f54e0852f328b362a7032edeefe0c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:04:37Z), 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/UKLV82000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0518b4e6c6f01a8d171f4948d7dfe81cba34cd21f7a93c668b3df3b548896cc7. 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/UKPNT1800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb52b3fa7c8a0c58bb7b53813bc9c5271ce0eb4937afd7b40209ea2951eee27. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/UKPNT1800143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f25edcada08ffbfc989a85feb262cd5fdb812f69e5db4c2e6126620fbf092cc. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:10:38Z), 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/UKLV82200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb80a0e2c258e3d19eb972ac6de5181f1e156c62e80616eba7679421ea2d238. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/UKLV82200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3eb7bb9d7ca14c812d37e467c2ade4399ce5f4605ad4eded98515c945af7362. 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/UKLV82200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ae8858ea51f54add5a05f4cbc30b15d32d88cd04d8644c807915ea6bc48e60. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:30Z), 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/UKLV82200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821f6784edf510765ee1c903fb7f02ce9518ae1f592c6e3fc0afc528c87ebf00. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKLV82200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2036de1492505feab7974453e3a114596ba7e28ae758082033bfaa978adff084. 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/QMDA62325675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d09facf1d8e8ff7d6ea6f609b59de296fe7e940344ce01b7b5cb75e61fb4e08. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM7282395904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c2431b0464b0329f752edf814cc2eea831fa8694b480ee480d61e7dffafa05. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA62325624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfe4a8515c99bcf940509272efeb68a85578c8d9a8bd354037944a912e329a9. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QMDA62325893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7259ef7950dfc5f72a07aec0452fa6a4fb1c8a874545587075bf07a9d53494. 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/UK4MC2400004.