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 0x515c7edf635f91b6524ba26ce68ae804e9d6911c9159d21f62f1fa93b9e06434. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f389662d-d2c3-4460-a066-6a8638416870.json and https://artists.proofprofile.net/proofs/artist/f389662d-d2c3-4460-a066-6a8638416870.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 0x86b4d761e9941956e4b991c2eb436e2ffd371cb46b019eac0f9a8ba05106e4ac. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:30:33Z), 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/QZTBA2329076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0add5e14aa416289834a663df32878bd1ff7de09827dbaa325cdb4582d3e8005. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFN2370483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8579b6df72ef217588387d7d2ec5b665aa490cb8812044ec92937aa8de0a650c. 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/QZDA52417664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3eb7911c953fc43f20cd5beb916f306f648d1f9c86bcf1dc00125239fd6666. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6M2452404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4779b29372b611843aefee3efe9615399d42ecb5b29afbb38a349f52caf21cb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLS2458006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ba0eafb8892685eb93f592fc1c43c51e076e7b703b4694b04fc28d272ded0. 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/QZFYY2518630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05464c600173baae9fd17b7058462e539df7bdda8d19e5f607727f5b6ff5e14f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:32Z), 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/CAHRE2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6804722c1cef4398ac1d91db65fc25feda64c37b332a47af52cfcd082fbbac. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:10Z), 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/QZTB42551307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2acdd328d8af76b0850d5acf1669a279bb382892955b172b1b3205fd17f63a5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:26Z), 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/QZTB42551310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788b8d569c8805c21397bab4047838b01d252772e9da7d0851cfe081115d158b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:23:09Z), 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/QZTBD2533663.