1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x2a89af16023f4d43a4bef3cc3dc3461bd69b95388bb607cdaddedf7f338082da. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/815e19f7-790e-4ab9-b62f-6be6dabcc4e5.json and https://artists.proofprofile.net/proofs/artist/815e19f7-790e-4ab9-b62f-6be6dabcc4e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Franz Schubert: Winterreise, Op. 89 (Version for Baritone, Choir and Piano)
Die Winterreise, Op. 89: Gute Nacht - Arr. for Baritone, Choir and Piano
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 → block OTSBitcoinBlock must exist at that height 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 0x7fa9181cc1428e6858824efb822215168a72cc16119487aa3f1696d857daf7eb. 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/DEX991792301.
Die Winterreise, Op. 89: Die Wetterfahne - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Gefrorne Tränen - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Erstarrung - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Der Lindenbaum - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Wasserflut - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Auf dem Flusse - Arr. for Baritone, Choir and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73243eab535113e1d26ba9d6d4d7b8b6e4c605e1a3a20f1487fbe6e3e60e9758. 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/DEX991792307.
Die Winterreise, Op. 89: Rückblick - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Irrlicht - Arr. for Baritone, Choir and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63db0944e9a1b7928ad39d3df0740ce8246ae80d73d98b8d7845f8840d5d4347. 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/DEX991792309.
Die Winterreise, Op. 89: Rast - Arr. for Baritone, Choir and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cf95e882e214b2fee757711d6c4c1bbeed9a06d9c519a418a103ea226c6754. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEX991792310.
Die Winterreise, Op. 89: Frühlingstraum - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Einsamkeit - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Die Post - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Der greise Kopf - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Die Krähe - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Letzte Hoffnung - Arr. for Baritone, Choir and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d52ee922bf24b104ad455d07c90e95b5ebf402d6e7aa4efd642d693aa49149. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX991792316.
Die Winterreise, Op. 89: Im Dorfe - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Der stürmische Morgen - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Täuschung - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Der Wegweiser - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Mut - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Das Wirtshaus - Arr. for Baritone, Choir and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2f807c7720fd6832ef749571948d2a28e9b51b7c043d8fa3e9147d47c11ee8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEX991792321.
Die Winterreise, Op. 89: Die Nebensonnen - Arr. for Baritone, Choir and Piano
Die Winterreise, Op. 89: Der Leiermann - Arr. for Baritone, Choir and Piano