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 0xd209a352951e010c33ef58846ac745c0f551cebeb70af078724d15c61cc374a6. 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/9d343d81-8a78-4c10-bca8-753df8d2d167.json and https://artists.proofprofile.net/proofs/artist/9d343d81-8a78-4c10-bca8-753df8d2d167.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 0x7bb004e1b77cff7083e474df3500db72b55650c4ae1f2ed1d0fc39bffe9a84b9. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FR10S1951158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a856e242580a6b69a0b79a2a70a396d09738bb3eb01b8e5d050e2d6db36136b. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCAEC1912964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab0305e6d7289f8b267efb8cc5e0db4a74e260b51da631cc18cf48cc1b0388. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:49:43Z), 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/FR10S1907094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524038d0eb8aff0c33620cec479bf2d76a3e8452f85ff22abe4e6757a233ccbf. 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/FRX872144141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d20b4ced087c4fcc9ef147c61a85d4aa231ca843e53e8f891f8af0fba64d13. 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/FRX872144143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850643162cc6215576881894a7c970d110263393c63104e8822358ca23f8ae24. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FRX872144149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4ed3e01c20f49cba0e939641be0f4d5a9b379aefcef7d29a931ec41fd303aa. 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/FRX872144150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e14b683f4ab7fa5ddde93e47ee84b4ad6576e27ea1ac340ff32d7791b3ca704. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/RUAGT2212158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985ebe09f0d9e622fc57ca3e326cb07e9b02c35e4f108f67f57d6e58faf815a9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QM6P42534285.