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 0x06c321fb6f68d4849e1367a7988381461e1600c03996ac9bf2cf18c45ea84db3. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b95cae6-e5f2-4a31-bb00-130e3a344b0f.json and https://artists.proofprofile.net/proofs/artist/4b95cae6-e5f2-4a31-bb00-130e3a344b0f.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 0xd973cacfc29c1c77b7971b25841db92dbe3920da95afb4a9a00caa927982fc71. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR0U91202508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fc23bf83adc3323f23bc195e1d91d64774d2c1e29e29c76cd78f63edea85f3. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:38:59Z), 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/FR0U91202509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6879db4a42a19d1e34ee5aa973529643d51f737e8413a2c65d247d522431fd0. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T21:00:28Z), 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/FR0U91202360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8325a25eff46570f63654ce33ea646e0ed76b0aa8a9f8ac9344cee19ff391. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FR0U91202361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241c5d366212f9ab8d5d15bea4c4f2ce6dae8acd3ca1d6de5324a4d60f7a3efb. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/FR0U91202365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae718d0ff0afea9af3f8e227c0640beed2a492ea27b3dcb1bde15d02124d1a36. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/FR0U91202367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ca4d89df71440d371c9ee77fdfcaf4fb19d0cf5e67aacd8c36ae0456290b4b. 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/FR0U91202368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9200ac7c33f93f3f828c88cb7eff67109371d2d6d62c0887e8d823360311f016. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:50:00Z), 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/FR9W11906722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0520e693c9048fa8e6fbd685bd6355f98a13158712df9a9b807297528dff7147. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:52:00Z), 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/FR9W11906725.