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 0x21114ca971dfcbd553e6da3f5d10de22df163130f463dce0de49b8151f7f01dc. 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/6f8bab4c-ed08-4ccd-a857-fedbe23cd31a.json and https://artists.proofprofile.net/proofs/artist/6f8bab4c-ed08-4ccd-a857-fedbe23cd31a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Nightingale: 4 New Works for Recorder and Choir
Kredslob: No. 2, Kim og krystal (Germ and Crystal)
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 0x701cfaa6989966bb3009cf1b19caf25eeec8de3a0cb5d30082886e32063cd01e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKFAA1201413.
The Secret Mass: Choral Works by Frank Martin & Bohuslav Martinů
Lamb, Siobhan: The Nightingale & the Rose
Choral Songs: Carl Nielsen Sung by the Danish National Choirs
Mendelssohn, Felix: Symphony No. 2, "Lobgesang"
Mendelssohn: The Complete Symphonies, String Symphonies and Concertos
Classical Music for the Christmas Holiday, Vol. 1
Orvad, H.: Choral Works (Corona) - Vega / Kornell / Threna / Paschal Hymn / Winter Organ
Langgaard, R.: Symphonies Nos. 15, "Sostormen" and 16, "Syndflod Af Sol"