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 0xa7f20f086e8ff8fa74e1b2eb83c2e2b53d1fc7adb633cb2e5f722aa3aad7f211. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a173aada-e217-4e64-83f1-c70ef21e033b.json and https://artists.proofprofile.net/proofs/artist/a173aada-e217-4e64-83f1-c70ef21e033b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Josef Gabriel Rheinberger: Musica sacra (Box mit 10 CDs)
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 0xcf8e5f3889dbcf4d32bd6aa452469c819a35b3f80bdbd089afdce22285a22f57. 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/DEB111502508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba0ae1579787b4102bc2871bf9049d86549401e3008f27f14a26e6211992f73. 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/DEB111501610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77541cac25396630d7795a707bafefb2da4d3a0d5883266bcaf859d3b5918ede. 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/DEB111501816.
Libori Festmusik aus dem Hohen Dom zu Paderborn mit Domkapellmeister Thomas Berning
Josef Gabriel Rheinberger: Christus factus est (Musica sacra VII)
Missa in G Major, Op. 151 "St. Crucis": III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d52e429a8453ff3c881268c6dad9dfbd3a7a7374f3e87afb717721037d1275. 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/DEB110300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fdc79033f40aa3ce97dfc23664811cf33d2268c86b1d4e8730ed93094e126d. 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/DEB110300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4d334bca2a492c916bb3e6e23d5fdeb14f3f43de509cdd99ce19d244759f52. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB110300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bbe06fa8010c58d330fbec0740c371041758da51966ebbc3841609d9df0cc9. 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/DEB110300117.
Mass in A Major, Op. 126: IV. Sanctus & Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a3b97ff8b3ec059894af46043bb48686167a3981653311b9d0f1f1449fc63e. 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/DEB110300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d39533fe85483d52ca1a5382039cb59d19d7752cdb8d795fadcc483c874119b. 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/DEB110300121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8046ff102be462ed4d6ef651fd62a922dc91971a5ed11446c0e8e0f57946c029. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEB110300118.
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 0xc137757375dc993779cdd2b7c4d4b1ce024f479b48f284e128d94162823316a1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEB110300119.
Beethoven: Messe in C-Dur, Op. 86 (Bearbeitung für Soli, Chor und Klavierquintett von Markus Gotthardt) [Live]
Freiburger Orgelbuch: Europäische Orgelmusik