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 0x0c10ef3e410c94e9d92ef4d16a429a65ad0bd5cef83c1b5d44e4dc5551c81726. 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/e5a019aa-a161-475e-80b7-6e924670e831.json and https://artists.proofprofile.net/proofs/artist/e5a019aa-a161-475e-80b7-6e924670e831.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 0x9d822d635451ce0ff9408b1aeacacb099eb8dbd61442599e5bb369af745a70df. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:40Z), 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/QZFZ42460511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed7bf7ce3063a3701fc67c3cd85f48b6de3876b05654066e4b440475821ce7a. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZFZ72458085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53427595aeef927cb11b0cf4be6d6479dc24489b4587de8395ab1df7b41155c3. 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/QZDA72453792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0478817025950583296a4895b9d877480ddd2b4cf553f252ef519f127cdad197. 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/QZES52406161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dc520902b3166fe6912fad9a1cf81668d8c2fdefa09de1dc643ba48a59e27d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6K2410697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2103b7d4ead2b3db8d2133f2aec577998f7a84f7579d82a51fcb1ec3be40092a. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZK6H2453334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff26cedf9955b2ec771fbf811868f909c80cc5970fa4bb88f527a5853da5d99. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:23Z), 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/QZNWY2445261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec281b39af54fda8634e919ae610d3d07ee5a61dbe3ef0182ab92ea02bafb6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB82422464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516808351cb363a620d7cb91b244fd16c942877a76c3ad0120955eab5e609316. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZZ772404251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0231645872f6435ea710d51be42f612edc95044bd29f4ce85eda6091de3967. 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/QZZ772428508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099979882a556d7ab90fa58160cef787d60672df441cbf44e5523ae785327b03. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:52Z), 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/QT6E92578098.