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 0xe3b0e2e7d9b42c8ba9a1814074068f1a4a075c39b75d709a0e18f4e6f932208d. Chain 2 (Bitcoin): anchored in block 954031 (2026-06-17T01:43:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ad2ed17-db17-4ef8-a5c1-ebdeac281445.json and https://artists.proofprofile.net/proofs/artist/3ad2ed17-db17-4ef8-a5c1-ebdeac281445.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Zauberflöte, K. 620 / Act 1: "Zu Hilfe!"
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 0x71e5914e69f0480e1991d1efc7eed177e8a5c7df549c4aa35047f36ba02485a3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN961831102.
Die Zauberflöte, K. 620 / Act 1: "He da!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc993ed195f706c63e80b6db93aca5ccb327e86814a6bddc4a3c30a261ec71c0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN961831105.
Die Zauberflöte, K. 620 / Act 1: "Rüste dich mit Mut und Standhaftigkeit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1991704fbb2e9f7d89232031289061d79f904591509796660a94c222e6b00d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEN961831107.
Die Zauberflöte, K. 620 / Act 1: "Hm! hm! hm!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0911f202cd56bca8bc266a7b565b3fc7e5fc85dd61eabc07881af6439ca70b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEN961831111.
Die Zauberflöte, K. 620 / Act 2: "Wie? Wie? Wie?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3543808b7ee08bb0abdd67ec6899cabbd687683606b689f5bf6a0fc5d82a5a. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEN961831130.