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 0x5ed61841775471ff7ae1fd77df36b41c65ca67f22e382662d096ff631b3447d9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a10e9d99-a181-40a8-97f0-69c2afe77cf5.json and https://artists.proofprofile.net/proofs/artist/a10e9d99-a181-40a8-97f0-69c2afe77cf5.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 0xb2b60bca6237ef0c497f3ad1c78fd0cc89f6532c46365c35f578c0bcda5c8934. 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/PEBQ91725704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ed6dcf587a13447dec3d6f54bd94c1285af8f73080d0869b2da300f170659. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PEBQ91725705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dad7597282dfce28267f7cce2364cfd3366c058201c23683267f0bd7cbafe9c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PEBQ91725706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946ed6dcf587a13447dec3d6f54bd94c1285af8f73080d0869b2da300f170659. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PEBQ91725705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dad7597282dfce28267f7cce2364cfd3366c058201c23683267f0bd7cbafe9c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PEBQ91725706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8b98ea1a2d16aa7eb01cc06900ae89ede08b95f4f94a5a7ac0dbe36f04184a. 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/PEBQ91725707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa85e223497a0369e39db9e617936de1294e708ecd2e9d02275e3e0e96ef92bf. 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/PEBQ91725708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb49e7eda530bcc9b2ec3423c545c81c2e5ab78c80272c6998a5b7e1081d663. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:13Z), 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/PEBQ91725709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694fda2a2573c44ac567ca52d9a67e16a75cb21fc02a371159fea223f8bdc18e. 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/QZFZ31969306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcad26303ee1f379f6fbf9e318c2a9353aa70f21e1c15e6f79ea75c1d450c42. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZES61925979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acc5ba5f5d295f8aa9eae6911b8d1308efbd32ddb258c1b3ce2a8d987567a60. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:51:35Z), 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/QZHNA1943541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8afa10f6fef866633065f4e7397d6b52dc1df01d1dd27566f1141f517a682c. 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/USL4R2044686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723697b96019520ee323b1e8ead32bbe012377e31d52fea38ded876c1265bdc0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNJX2295187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9b7f5472f6ea88d181829971ad3961029b578d094f4aea6f44d11df56c394. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTPX2298806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7be966630f49ee24ef2bb55425da4087a576776d87c5ad2b3795e02b97b26b2. 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/BK4DA2300655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d09b94606c70092d4b10cc3d109ad6d94a06bb372f472ec4609ef98345f12e4. 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/QMDA62513597.