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 0x1b77cf53fab097797ecc8356ba29db1a3402f82272ea72ed6189217e316b99bb. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f77c313-5fb7-46b3-a7df-62f828e937e5.json and https://artists.proofprofile.net/proofs/artist/1f77c313-5fb7-46b3-a7df-62f828e937e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bantamweight (waga lekkopółśrednia dub by Petr Yac)
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 0x8486449247f9cd07c350b7e1b263e1b45e1eb5626e5dbd8f323a01bce8988a1e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/PL98H2501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a89afd40c64101e7ae3bf319f71f7fbc17460974bc61b3eff7e7c1b364980b5. 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/PL98H2501002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4a1dbbc3599304651be5abc9bf6f248421ca33fa2598635096d3422e0adadc. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/PL98H2501003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c3c0f439b64a1e596c38a088ac601c5493b0d87d6dcfbed41db5601d0d9c18. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PL98H2501004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb055802f3175bce74458555d08ba8180ceff3506df2b1add861b62fd0ab9e136. 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/PL98H2501005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ff9f19bbd11b9194ff862c207958bafb4c282af60dabe096644ff989e9bdf. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:01:20Z), 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/PL98H2501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0198be6a2209346432b495d7a72d187d3c93855666515b4753728df790eaba. 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/PL98H2501007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d583ea6ba423d0ca39383cfa4f40a52fdc704a41cf0d3a9d7e870f436a78035. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/PL98H2501009.