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 0x82ee98731202d252e9a660da12548b8f9c457b3ef9eff18d99f913f4e69106fe. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2984799f-2ca0-4e42-aec3-a06ba614ee1d.json and https://artists.proofprofile.net/proofs/artist/2984799f-2ca0-4e42-aec3-a06ba614ee1d.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 0x3ae53b609bbf6145e06044b8f9a584cfb5365ba0109fe6a906fd76ac05743a7c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:57:30Z), 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/QZTPX2493878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0615b7680462c164bf541401229bf21c2d4b2291c881c38b4ff763ee5f6e65. 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/QZTVM2449246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74e63342cc7990a0254a9ef0d8044ade08da5038af738a0ffeed047ed2e343b. 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/QZW9K2422011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c7309c51289f6b25ce6b3891383ca61329912cfd020d7b03e0beed7be914f. 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/QZTVM2422130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5eb576f0e581a58f863a9dc52654fb210fb0af8db13b412e30217bd7f634e00. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZW9L2406260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50311139283592acef33aa7648ff339cbc3f997ce66218b5cf0ac1aaf69b8747. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:35:34Z), 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/QZW9K2432755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9c7309c51289f6b25ce6b3891383ca61329912cfd020d7b03e0beed7be914f. 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/QZTVM2422130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4da83fc172b7c3e262f7816c14457bad11281921c50e697b27080cd85b4915. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJW2502160.