thumb|right|Women dressed in yukata at Tanabata thumb|Tanabata festivities in Hiratsuka, Kanagawa in 2023 , also known as the , is a Japanese festival originating from the Chinese Qixi Festival. It ce
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 0x72c64a797f01eeef0d2489f2e175e63344d202a750213cbcf7bfbe95147e2529. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/984434f0-b273-4ef7-b90e-2999d8a9dbc6.json and https://artists.proofprofile.net/proofs/artist/984434f0-b273-4ef7-b90e-2999d8a9dbc6.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 0x99ec570a678b92add7cdfff880b5661a1bf3261cb50153555cc624069c675ef3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPW562000733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4e06738a6374274a00a2fcdc5d790b1c7ace2d2dd21dc9d99842b24255800. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPW562000795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fb3096ee3172afc02e01d1ac925603863896fac96c4d0395e4a51a2bfc7cf2. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/JPW562000796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abbcc4b66f9af570067b8315dea939600245fd45cbb49d66a477be7c80fd8d8. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/JPW562000821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122c77ac6c2cb9634875626d92b8ee5a2ad2d381dae91110c4e04b702562104b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:16:28Z), 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/JPW562003687.