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 0x0881515f3db53efb6ec22ca3a2bd27126e844d997b89cfdde389b7e36738f6ae. 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/7479ec35-af91-461a-8ba4-ccfb61c88313.json and https://artists.proofprofile.net/proofs/artist/7479ec35-af91-461a-8ba4-ccfb61c88313.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 0x32619a5bceb3e04a356d4c12a7cc9a9bd7d0df0adce2edcc16e316cdfd49d361. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBUQH2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05f1a1755a277e8c2a3518744638cd5c2d2f2d76849dad8720b5b9a3e3e41ff. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBUQH2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a9fd1839279ad60b2e2e9809462d2035e0f5bfac9a5aa4c9f45c8a67cdbfa8. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GBUQH2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152aea4c7826a7a090e415fcf1fdb474f3e6400e606e92a7d82da3825e9e6af1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBUQH2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f9d1d5cb655550017f80be78afcdbf9eb6dede21a6eb8a71edaa2d4ecf83c2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBUQH2100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439b4a2cbffe3f0f61bf807fd5a174a65477e0047fe66b4f48f4e800b701fc2a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBUQH2100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ed9950ccadb5831225f80b25c8bdb0c9595ee56afdb4cc0f5961d16eee6771. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBUQH2100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511fd5928617752e4f2bb5a7a1ad80bd2b1d8be7760cbe12bb1a33b07a6513cd. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/GBUQH2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831d6c80e6f5e2b10982a6f771d938d29d05767ac7f1f5e23e2964cc68c57cf6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:51Z), 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/GBUQH2100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9946839ea41924f3db3f406a9fbeebcd5776c0853932d35b4d4d428cf9b75720. 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/GBUQH2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df25e7b9a51e951e84088ef425380fdc1c550758ccb4dd6630cc9b11e670763. 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/GBUQH2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b7694c0dbf14ef89336c91658e36fd86c935e1536c0305c904f6547bfe617f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:59:10Z), 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/GBUQH2100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e874f51b3380133dfbf3130c87d5112bbdbb35ef934dc6cba38648892cff5b. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:17:06Z), 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/GBUQH2100049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37c297eac02e4457ddf03eec62aff3adbd0570e59ac48b44d34ce74da70d00c. 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/USUR42442804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53c7d9ac291fe4ac69fbaeed66ddf0ed669c0c37350f4078837a747a978270f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUR42442802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7cf14e00616ab0c32c8d8a38fd23d60cecd050cc47cdacc42bfbf0e901d43b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USUR42442803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b170ae0fd079e8a0526220140e0485d58d98a71048040b06440690cba0ad9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USUR42442805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea0430a8e376559eef009c1850f50233444fcbf7fc6114463a22dbb371dd406. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USUR42442806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40c20e890d1d715a1eaabb7b793d885bfd9ac975ed0a20cb7e774b8ff13245e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USUR42442812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d28710f033d9ca0feb2f637f6268f42f4446817431d63392903fe0153588894. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9Z62300412.