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 0x882095924137a504566ce80e4361e81f9999034cffac8db2c49111c02b6c7873. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2ec2336-55d2-459a-ae36-86ddeaf8dd9f.json and https://artists.proofprofile.net/proofs/artist/a2ec2336-55d2-459a-ae36-86ddeaf8dd9f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Benighted Train (feat. Kotonoha Akane&Aoi & 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 0x65449e018d97885add13c51634073f1419502691b4b8a3b7cd9bb92d3c286b7b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:39:00Z), 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/TCJPR2298562.
loneliness (feat. Kotonoha Akane&Aoi & Nenenene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a53a04b3663659f3f3d00c04fddbdd241c3a01c452181b9a25a1ddeec4c85e3. 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/TCJPR2298567.
Life with gas meter (feat. Kotonoha Akane&Aoi, Nenenene & sutopikun)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72bc37062466daaf8f8eb4df7e076c88c7aa94dfee1845a73eed17955b5c4f9. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TCJPU2214992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff52936bceeb03ec518bf8199d1c80a7d8ab4c7db48f6a4b053003a4f6eeb1f8. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:00:59Z), 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/TCJPU2214994.
The ghost in my memories - Seirei-version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4857fd5ac3243c8295b0d850b01476ff81c3c8857b0dbded4e536aeccea5455b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCJPD2564399.