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 0xecfd036a3595bf3d7b737b8aa8b78e63b9f1fa64144bf72b264fea645b37dfe5. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c057c7c3-ef5f-412c-a841-99b1ea76e8ff.json and https://artists.proofprofile.net/proofs/artist/c057c7c3-ef5f-412c-a841-99b1ea76e8ff.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 0x8be9a4b34d92e6d7864c2557ec6c0e68c1b2cc79951440ae0130ac73ef020ca2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:01:01Z), 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/USCGH2467067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98099b43597b23901e0849a3593de6c1a8c12924c33286104dd7438e5884ad26. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:57:34Z), 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/USCGH2467068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0283bc98e027fa0eb342c7d88ea7abd526e4482e66fd73bbf1951c96cd8c9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USCGH2467069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572a75410cb1345515cf81751e87cd32f27dad04a9db822c07240fd677d7b284. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USCGH2467070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c9067f086a3c48c2bb825fbe6e2df268a610f4853db1824ead0cb1d18c8d96. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USCGH2467074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e24ed95103e69e8e28a77573bafbc670105e1b82d67a7dd51e1562af9635f5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGH2467075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e06e77a63996a3bb2fb62387e81a9c0e06417a7daf8fa9343be55a8958c9009. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:44:38Z), 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/USCGH2593068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46d070c604b7cdbce01e1437a0845faf875af28f83ccb6dd37fbd4d2db29856. 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/USCGJ2568874.