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 0x0a30e6f823a8fbb38a932a43280db4ebcc45bfb0721b41c3944504ce5241b1cf. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a230186-78c0-4c99-bbc0-73a84643f2b6.json and https://artists.proofprofile.net/proofs/artist/7a230186-78c0-4c99-bbc0-73a84643f2b6.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 0x514b66e59d1e2063533246b3ad8d12003c307720d2ea798c216c24a9bb85ff4e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJK2502959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9ceca6a7602b2018873eefda92646e3396d0d7181e21a287da41fe3dc8cc2f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJK2502963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c8bc01098d9e757f62a596354c96e023f84c15b9ec98a1237e81df6849fe53. 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/TCAJK2502965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105b1ee98cdfd3c53ae450ede5600136fa5dc889697b843886972ca7ba9b759b. 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/TCAJK2502966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef81a409d5b53e7572a975fa4f6e762339d67b8db1fc5dbe7d1e2be642adf06. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAJK2502969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9204a1aaa5135ed2638be6aa4fe63297fdb05012646309c1fb17b70b8d4bdd01. 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/TCAJK2502971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6538f21c6dc7a62e767ef5155064154444753e97f826d852978e80b6dfa1e6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAJK2502973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526dc7d822a339106af04b4889316d67c9dde837a00ecd7424f74460d9ff57ac. 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/TCAJK2502989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66596e3d3858832a9900fb319067b87b51e710a90923b5cc52fbb32a864aad71. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJK2502992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706e01be7397b3b1c77205ba399ee5a72eb5c3cb386de141030008c8f031380a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:12:57Z), 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/TCAJK2502994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef76d9b44670209bcbfeaaa9b69b347e8bba0a4c748e58c4f262b2d1e01f65. 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/TCAJK2502999.