thumb|upright=1.35|Grand opening of the first Dada exhibition: International Dada Fair, Berlin, 5 June 1920. The central figure hanging from the ceiling is an effigy of a German officer with a pig's h
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 0x09252c204afa94b0839c0265cb7de8a2da3db00a9fbc4f5ec8ab7b03d8691d0a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9200306f-a4e8-47c9-a3e7-51ad1d0446c2.json and https://artists.proofprofile.net/proofs/artist/9200306f-a4e8-47c9-a3e7-51ad1d0446c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
time to switch brains (feat. Kaai Yuki & KASANE TETO)
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 0x90db67b74cd62dbbbd0d92020b67b920f5440c89568510659726427460c67176. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/TCJPC2444458.
ノウノカエドキ (feat. 歌愛ユキ & 重音テト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90db67b74cd62dbbbd0d92020b67b920f5440c89568510659726427460c67176. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCJPC2444458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445e829f01d65adc4229eb948242c2272217d08dcbfe8ff08c1eb98ccff2849f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPJ2554215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfbcd2cff1ed53ccf3c623a1dbda7970f0422c4ae13822043489f38045d6ab6. 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/QT66K2572338.
sandbag (feat. KASANE TETO & Una Otomachi)