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 0x0385ca04de3a89ccf317630a4d6fe3259c9d81d228f3d7eccc3df080bd582342. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5555d00e-b4c7-469c-b826-a7c6410426bf.json and https://artists.proofprofile.net/proofs/artist/5555d00e-b4c7-469c-b826-a7c6410426bf.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 0x645ac4f0168da25d62789d1e6fc6436f0ad3f7ea25d6db39182a027751ac917e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPA962380061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd5cb03fb4492f13d6551bc2cd98c1427b117c900116142cde7cdf0e78ceb4e. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JPA962380062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906e73cd08d5098a005936121c77e33d49a33778a9533ab30ea20934a70d2ba5. 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/JPA962380063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d51de10b2f57142866dcd1a25bfa9839291e5e8c0fd7a9d9b0f56dc27bd500. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPA962380322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5972c3ebe065f1fba85a5703ea1c4666321a378bfd64a3d57069715980e9e0c8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPA962480168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f9397341a4de9acf21c5fe835fe754d36cea6bb78c0778c4bab858591fb912. 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/JPA962480165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b72317a13c69f5c99d01618fb76a293e490a71c9cb3544407b94d06b79d1f4e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:25:01Z), 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/JPA962480166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa593512241cedf6b3970986dcdb7aff61283da43f23e1759ef65c1314d0f9417. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPA962480169.
君は夕焼けのようで始まりに似ている。
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185c09ba75e98e5d28d910205e48d4db74b840c05d8292a2e2bb197353cc64aa. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:36:24Z), 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/JPA962480170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12579b1b8ef1d98989d42e8d880fc27740ca1fd8bf599ada051f2098bc80723. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPA962480171.