thumb|right|Playbill announcing (in Russian and Polish) the 1913 premiere of Irydion by Zygmunt Krasiński at Teatr Polski in Warsaw Irydion is a drama written by Polish poet Zygmunt Krasiński. He bega
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 0x7d571d2b56645e8b3747aa0af4db5a18038631bc600c68691850dc881374c568. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34abfb17-51b0-4f08-8ef4-338c8acd53ba.json and https://artists.proofprofile.net/proofs/artist/34abfb17-51b0-4f08-8ef4-338c8acd53ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
U Boku Bartka. Hołd Muzyczny Dla Zgrupowania NSZ
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 0x6b65b41d3574ce7ba442a852cd87071122fb8e907697700889c60ef00b3ebd91. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL06V2292665.
Postludium - Dla tamtych ludzi, dla tamtych dni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68525a881b5c75116eabd5994db7a6de16c515453bf96d64f05a92b738161bed. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PL06V2292667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd80efa232fd21310fec9ccc026694f2322b81f925eb4d3a172bee8ead094d2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PL7B62359126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d528217a8b15eb4c13fc0e7f342ece983cd99cc10daee68554f5e09b9c40c6b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PL7B62359132.