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 0xcd693efb37c681e6a19aa0712a9ae18deaa99c8315fbc8a3fa682146368fc478. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc93f2bb-001f-4864-8e1a-6e4bcc189999.json and https://artists.proofprofile.net/proofs/artist/dc93f2bb-001f-4864-8e1a-6e4bcc189999.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Koos voorleesverhalen 1 | De avonturen van Koos
Koos Schlafgeschichte 1 | Koos' große Abenteuer
Koos voorleesverhalen 2 | Piraat Koos ruimt de oceaan op
Koos Schlafgeschichte 2 | Pirat Koos reinigt den Ozean
Koos bedtime story 1 | Koos' big adventure
Koos bedtime story 2 | Pirate Koos cleans the ocean
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 0x780ab8a74bce6f0cce4e62d9e22b7a9deec39c6be5e43a2502ab1ecdcb989167. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES52280168.
Koos voorleesverhalen 3 | Koos gaat naar de maan
Koos bedtime story 3 | Koos goes to the moon
Koos Schlafgeschichte 3 | Koos fliegt zum Mond
Koos voorleesverhalen 4 | Koos wordt een monster
Koos bedtime story 4 | Koos becomes a monster
Koos Schlafgeschichte 4 | Koos wird zu einem kleinen Monster
Koos bedtime story 5 | Koos explores the jungle
Koos goes to the Wild West | Koos bedtime story's |, Pt. 6
Koos gaat naar het Wilde Westen | De avonturen van Koos
Koos Bedtime Story's 7 | Koos meets a dinosaur
Koos Schlafgeschichte 7 | Koos' Große Abenteuer
Koos voorleesverhalen 7 | De avonturen van Koos
Start of the Day | Begin de dag met Koos