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 0xca02f77f999eba24b83bbf3602a2a2fca8c38fbe664dbc34b0e9fc4e8121fcc9. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cf02c85-aab3-4488-a5af-b3f0ac56bbec.json and https://artists.proofprofile.net/proofs/artist/8cf02c85-aab3-4488-a5af-b3f0ac56bbec.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 0x23a9ff5e9dc9447a618cb69743da43357633d6087967a65149fba1789f377fbb. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USDY41921021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043548fc8a7344863e744d23b79dd1d531f92827f7613c0ee5a7a4964f00068d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:40Z), 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/USL4R2014453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141e1ea9b3758fd70b5bc5da3ddb0b50b0ecfabc0f0f0b834f707c97ffc8a2c4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZS7J2113003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a59fcb2f3a423aa6c1fc0bf1e7e4724ea11be00f093e44f2707164b68534792. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/INE302300183.
Tumi Nilanjana (From "Tumi Mur Anurag 2")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a45497780d43b8140e1f2d36aef5b7595da0b0556786ac15e2b862b17a6eb1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:16:57Z), 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/INE302400299.