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 0x1b7678b7aab6f5502c5e73a6f00c9e6f761201a9af499b04fa9c58cbf835557c. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0902f635-0dd3-41d8-9abb-2532445c05da.json and https://artists.proofprofile.net/proofs/artist/0902f635-0dd3-41d8-9abb-2532445c05da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Believe in you (From "Re:Zero") [Piano Trio Version]
Never Forget (From "Bocchi the Rock!") [Bossa Nova Version]
Never Forget (From "Bocchi the Rock!") - Bossa Nova Version
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 0x8950f87790b7a6e74ecca3f3b529f2932b25d5822f3de463fde1f4f5e3717f8e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:43:49Z), 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/QZPJ32257075.
Guitar, Loneliness and Blue Planet (City Pop Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35016319868bd0eb932575d2b78bcd6987d49151700ed2d0ad2ccc840adb58f4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZPJ32366588.
Distortion!! (From "Bocchi the Rock!") [Bossa Nova Version]
Seishun Complex (From "Bocchi the Rock!") [Latin Jazz Version]