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 0xeab84f23c73fe3cc8576db1a053c9014994af85425217e8f4849701d00bcd27e. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13290fc1-2be9-421c-9e6b-6d55a4dc1d89.json and https://artists.proofprofile.net/proofs/artist/13290fc1-2be9-421c-9e6b-6d55a4dc1d89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ta Oreotera Tragoudia Tou / Afieroma Ston Megalo Kritiko
Anafora Ston Kazadzaki/Kritiki Anagennisi
O Megalos Kritikos/Sto Psiloriti Th' Anevo
O Megalos Kritikos / Sto Psiloriti Th' Anevo
Αναφορά Στον Καζαντζάκη / Κρητική Αναγέννηση
Anafora Ston Kazadzaki / Kritiki Anagennisi
Etsi Tragoudai I Kriti (Vol. 1 & Vol. 2)
I Kriti Tou Kosta Moudaki - Apo Tis 45 Strofes
Athanati 'ne I Kriti - Kostas Moudakis (1926-1991)
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 0x821813549a375839404d7611572b2e4b9aab4795dfc996d77fe55048a23216b5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GRE017100393.