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 0x05eafb39636a292daa470c45010c86a3440014407c0544707d4af2163438d404. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aee2a674-2cba-4320-b6fa-82a1a075f90e.json and https://artists.proofprofile.net/proofs/artist/aee2a674-2cba-4320-b6fa-82a1a075f90e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tristan und Isolde, WWV 90: Prelude (Arr. Humperdinck for Ensemble)
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 0x2d1bfdeecc703c49d091e62898e639808fb1d952df62ae991b6e6323bbcd5774. 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/DEAQ72453001.
Wesendonck Lieder, WWV 91 (Arr. Fontanelli for Voice and Ensemble): No. 1, Der Engel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07410e37b454f0a6bf89bb2785ba86c99229ad08f047bcaa80b9f5632cca830. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAQ72453002.
Wesendonck Lieder, WWV 91 (Arr. Fontanelli for Voice and Ensemble): No. 2, Stehe still
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6357992b3fdc470efdda6adf8bde75359c8ca2211b95432b28008576b30ae428. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEAQ72453003.
Wesendonck Lieder, WWV 91 (Arr. Fontanelli for Voice and Ensemble): No. 3, Im Treibhaus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d9765792b042521f54e110cb7645ec60985a7e163eddde8d57df175ff1c0e7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAQ72453004.
Wesendonck Lieder, WWV 91 (Arr. Fontanelli for Voice and Ensemble): No. 4, Schmerzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516c8c79c9100a34da3cf761494537b6760f33b3b34e411c0cae193fa15bbb21. 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/DEAQ72453005.
Wesendonck Lieder, WWV 91 (Arr. Fontanelli for Voice and Ensemble): No. 5, Träume
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcc35f8c5337685ef9174faa979dd5df7275783be090e6f0bfb7cd282b71039. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEAQ72453006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddcb69d34bccca4af093a2817c28bd661ad0c88a09497242ca197f2d75883a5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEAQ72453007.
Mignonne, WWV 57 (Arr. Fontanelli for Voice and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522e1ba8322409c5ba824b7c58f68706951707352bcabdaf9824c53c057d1211. 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/DEAQ72453008.
Dors, mon enfant, WWV 53 (Arr. Fontanelli for Voice and Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61d95c9116e28ead1faba400cb4652c84ab62d3b4d1989adb7f048506a8cddd. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEAQ72453009.