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 0xf043dfee38a1713976d1a39c623fd5904867ba0979cf9b3ed8aab253ff0f7b05. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf768fd9-aab2-4b77-a4e1-e737de1a740c.json and https://artists.proofprofile.net/proofs/artist/bf768fd9-aab2-4b77-a4e1-e737de1a740c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Das kleine Handbuch des Stoizismus (Zeitlose Betrachtungen um Stärke, Selbstvertrauen und Ruhe zu erlangen)
Kapitel 1 & Kapitel 2.1 - Das kleine Handbuch des Stoizismus
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 0x408ca4e18543ef1ccf7a78b173d2c20909ecaadac1a0d046bbc07a8b05d341b5. 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/DEXQ71127457.
Kapitel 6.2 - Das kleine Handbuch des Stoizismus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58de45fda5abcd9b7d97335b52d6686fce3bb24b264406ffc5a6a909d479d60. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:16Z), 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/DEXQ71127465.