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 0x2318fb3948ce650bd7451b2e834940c22ad92dc2a1c5fd115e33f70067817b4f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53dcaf0a-f251-43b5-931a-42ff50c6146b.json and https://artists.proofprofile.net/proofs/artist/53dcaf0a-f251-43b5-931a-42ff50c6146b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e40b69a3837fcfaaec166c70da33a5f4caaef2c2701e9f5b72d4e9f81003a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5WOzQRqHhZdb1kC9UhBZ67.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5WOzQRqHhZdb1kC9UhBZ67.
{"copyright_id":"0x4170aa7da09cf35104551be8ca582f801e8c7af934a9df2ded614563edddd98b","isrc":"QMEU31506362","name":"La Cumparsita","registered_at":"2026-06-07T14:17:56Z","spotify_id":"6tJ0zwyKkJ9pWXN0XWqLqY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4170aa7da09cf35104551be8ca582f801e8c7af934a9df2ded614563edddd98b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6tJ0zwyKkJ9pWXN0XWqLqY.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6tJ0zwyKkJ9pWXN0XWqLqY.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe and the World, Vol. 17
Ich bin der Hans im Glück (From "Heut' kommt's drauf an")
Old Ironsides March (From "The 3 Musketeers")
Don't Let It Bother You (From "Gay Divorcée")
Ach, wie ist das Leben schön (From "Scampolo")
Quelque part, dans un coin (From "Un rêve blond")
When Yuba Plays the Rumba on the Tuba (From "The Third Little Show")
In 24 Stunden (From "Heut' kommt's drauf an")
Ich war nie mit Lilly allein (From "Schick & schön")
Efim Schachmeister Jazz-Symphonie Orchester
The Wedding of the Painted Doll (From "Broadway Melody")
Plus propriétaires (From "Un rêve blond")
Schenk' mir ein bisschen Sonnenschein, Marie
Some Sweet Day (From "Children of the Ritz")
Sie will nur Luftballons (From "Schick & schön")
When He Comes Home to Me (From "You Belong to Me")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24635648f5a4353e08584d920c726d94025313812bf7a8770a0d2f2c5f3cda34. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0iJzQlmHM6liWaufxPWf1u.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0iJzQlmHM6liWaufxPWf1u.