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 0xb40e219cd73a0f08b6b321df2af3ba73e98d9956b73bb3fd834413cc066245bd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f35ae23-fc72-4aa9-b474-e5460e85024e.json and https://artists.proofprofile.net/proofs/artist/4f35ae23-fc72-4aa9-b474-e5460e85024e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Der Freischütz, J. 277, Act II: Und der Bursch nicht minder schön
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 0x71ffe6e6e58697d7e589bae0f1997870757855c30a98fc849b0df71f76e8ad39. 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/DEF057330225.
Der Freischütz, J. 277, Act III: Du hast dich dazugehalten!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ddd6ead6e6cd865c6042e2e3bde607eafb9902d184585b09f540ce959b4689. 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/DEF057330228.
Der Freischütz, J. 277, Act II: So! Da oben mag ich den Herrn Urältervater
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d16cc58c2011762774e85708d95a98597b455c3316f3e89ee118d024300df53. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEF057330224.
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
Der Freischütz, J. 277, Act II: Meine Agathe!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be01d4275363355103d800a1d5b291bb207dddf02b021cff532f9ed4bb66bad. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEF057330226.
Der Freischütz, J. 277, Act III: Genug der Freuden des Mahls
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f911f5be29230e45023a4de7b063c71261411d59710bbe10b39e9ea8267284. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEF057330230.
Die Entführung aus dem Serail, K.384 / Act 1: Nun Konstanze, immer noch traurig?
Mozart, W.A.: The Abduction from the Seraglio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c3dad2d613cf2199b5625ab97372ab7fb36567183e055c7fe65e40a4a9681b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEF057330323.