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 0x9b340e9e2f709d722f57b0c5fb50464f799bfeecd09013a1f061d6e087b127e9. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1dc5f24-8cc0-4b99-988d-91077a6094fa.json and https://artists.proofprofile.net/proofs/artist/a1dc5f24-8cc0-4b99-988d-91077a6094fa.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 0xd216714ee13d620e7e89ff918f4f3e16e6835bf7723967e9f4fd66d258b92069. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWFR2539065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c618ea20b624c6d183c30cf50a31c1807d6e64d65b6b1c47af5a027945e484. 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/QZWFR2539061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52c3566c6ac111ec7d4d4e87f76fd2b6fdae84d867cf5940a52e2d1e0c71045. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFR2539098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62dd2d576018a61842fceb1f121a894b7d9a27a3a474f11327c51310ccf1d10. 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/QZWFR2539080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4197d968abfe0f7efb2aef452d9f62ff243f383210bd0c93a8d4b674361568e. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7N2552634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b9d9e7d4e7a6bb7b46980e20d3ddc138b2a79fbaaa08f2eeeb4c4077c56927. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7N2549979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e86319938789df3ba58bbc3fc4a5e9020c5582e60f82223df848b33586d50b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7N2552647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf56e93de85634cdfb8a5382b60baa612b804a08cf0525d3e920c23cbe5dc4c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ7W2512360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f2083780e68726c481e8b1b7f24d3adda87402970249b869c163895f9020a. 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/QZZ7W2512361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09054030032b250a5ea6d04fa29eedd8b694a5871973f66218f5e3f6b92038f. 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/QZZ7W2512362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5f70e2b6ce0a0a441b83f95afff5c3f8304b07f7b4afb8554bb1356e17b1bb. 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/QZZ7W2512363.