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 0xa5ca3d562b515ab289bc1bcd3de17d63be51d781b8c382121691de85fc52ba90. 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/b55bc765-c1dc-4b9c-a9f2-f88758bdd42f.json and https://artists.proofprofile.net/proofs/artist/b55bc765-c1dc-4b9c-a9f2-f88758bdd42f.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 0x156cdde1fb440f94a099473179b84729ef278a46a0952f465433aaa5f20f0134. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:18:49Z), 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/INS330100560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc316b27328a2b48253c6191ea07d90bedf07ff627874491f705e4ba1adc63d4. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/INS330100561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fba9afe8fbfb5d1c036700b7791e19cc036660433ebc3b1144b82d2836fda4. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:29:06Z), 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/INS330100563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50504ea9efd9149345c6bbe3570c71a19dc3b5963f12c6011040d3b717b55187. 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/INS330601260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7e468e7a0b7642ad7a43357cae365e9ef097423bfdd00d4a97a5c7a1614a3f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/INS330600944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa966d98b19de91c7aea9eddc54871db88594e3bf9ed6226c71bfb891e039abe. 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/INS330602543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799d96388fc97834d17be54effc91dc1983c477617af5d96ca6c39a9c749af74. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/INS330602547.
Tamil Classical Gems - Tiruttani N.Swaminathan