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 0x4e7721ed3ba2e8ea6697d9ae365e1a8bc5cc8b7d99b46b87547021d9f6e046a5. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b99bdb7-863f-44a2-bc3b-61aa0a4be5d3.json and https://artists.proofprofile.net/proofs/artist/1b99bdb7-863f-44a2-bc3b-61aa0a4be5d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Clocks (Instrumental Version) [Originally performed by Coldplay]
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 0x2745462ff77d07822004604fb0dc9725122ae95db7d5a40e312e9a294b7c9da1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USE831509226.
Happy (Instrumental Version) [Originally performed by Pharrell Williams]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df9728877897e05e0e615ce65e9f26925bb1ea6c2ffa8c4c99e5e8d15cca112. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USE831511184.
Hot N Cold (Instrumental Version) [Originally performed by Katy Perry]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb71e96f0671143dd9eca5ce05242fa355e8ca45942a86f0d4285cf55f6fd56. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USE831511493.
Human Nature (Instrumental Version) [Originally performed by Michael Jackson]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58502082d88ed922665e50e8e4aca90f2ccde5333f689c8a1dbdc8bf99c74c02. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USE831512224.
Liberian Girl (Instrumental Version) [Originally performed by Michael Jackson]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6732a3538e07f96b0981ccce0b26bc56f9e1866e86c9a72eb0020b68ad0541. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USE831512225.