John Pringle may refer to: John Pringle, Lord Haining (c. 1674–1754), Scottish landowner, judge and politician, shire commissioner for Selkirk 1702–07, MP for Selkirkshire 1708–29, Lord of Session Si
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1014641f9252f1bf9b66c7418c92807d7bc376f5fe434d184fb1a83c1a446a. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9eb17ac2-aea0-4cf4-8d1b-9f5c9dc9d2cc.json and https://artists.proofprofile.net/proofs/artist/9eb17ac2-aea0-4cf4-8d1b-9f5c9dc9d2cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Magic Flute, K. 620: Pa-Pa-Pa-Papagena
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b017911eb028fbd3d50e8da00e27502a5708795abc347f2e3a92fb89d83efca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AUAB09050012.
Die Zauberflöte, K. 620, Act 2: "Pa-Pa-Pa-Pa-Pa-Pa-Papagena!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b017911eb028fbd3d50e8da00e27502a5708795abc347f2e3a92fb89d83efca. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AUAB09050012.
Don Giovanni, K. 527, Act 1: "Là ci darem la mano"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad901e4c10a1dd4a0f2316d15aa522a04e0295fadfa27fc27b54d051e54eeb. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SEWDL6009748.