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 0x4c3d64081718aac6ec39013437a3241c8ec26d237191c9a0c90bf6d8cb309998. 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/84639bc5-6c38-45dc-9704-6f56e7088df6.json and https://artists.proofprofile.net/proofs/artist/84639bc5-6c38-45dc-9704-6f56e7088df6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Nicola Campogrande: Sinfonia No. 2 "Un mondo nuovo"
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 0x20f1a5a43efbfdf36b41a3a971433a8b774b2f2e9db148925574475158ec4e1f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513301 — a six-check JSON result.
Das Rheingold: Scene 1: Weia! Waga! Woge, du Welle! (Woglinde, Wellgunde, Flosshilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602a96d1f2bdb0de20c67c785a95a6bdf540c86ca22d3f332093f9b1d25ea68c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513302 — a six-check JSON result.
Das Rheingold: Scene 1: Hehe! Ihr Nicker! (Alberich, Woglinde, Wellgunde, Flosshilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fc2b278f8917d4297a7e7a0aa3973a555f1138b5ec145707ef3d5183d90b69. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513303 — a six-check JSON result.
Das Rheingold: Scene 1: Garstig glatter glitschiger Glimmer! (Alberich, Woglinde, Wellgunde, Flosshilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30688de34827b7258a7a2147180c99b3c6244d01a058f205581bd55465964893. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513304 — a six-check JSON result.
Das Rheingold: Scene 1: Lugt, Schwestern! Die Weckerin lacht in den Grund (Woglinde, Wellgunde, Flosshilde, Alberich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51104c24e227fe9e027d2be20d8a125b16f8ffab48acc4a10c142683c6e96f91. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513305 — a six-check JSON result.
Das Rheingold: Scene 1: Der Welt Erbe gewann' ich zu eigen durch dich? (Alberich, Woglinde, Wellgunde, Flosshilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97683d0821d3c98c7241e21546932ff0a06fac903ccc6d8528ed67481a20e41e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513306 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3b51c6236ddbcc2b215442517d29b6a80a69a85c0cb6a68b9759b2f828fad1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513307 — a six-check JSON result.
Das Rheingold: Scene 2: Wotan! Gemahl! Erwache! (Fricka, Wotan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadcf736ea15d60a115d23b0a36d3a0d6ff9136070c2447f4f20427f07e3d1cc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513308 — a six-check JSON result.
Das Rheingold: Scene 2: So schirme sie jetzt (Fricka, Freia, Wotan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e9777f010dffab73ae1286fa2c1937e9d8802690cb0535fbcadee7652e91f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513309 — a six-check JSON result.
Das Rheingold: Scene 2: Sanft schloss Schlaf dein Aug'! (Fasolt, Wotan, Fafner, Freia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889a775ef752591cdcafeffa06784c9dc0d0227b6e2a9dbc3ef23960b1c51452. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513310 — a six-check JSON result.
Das Rheingold: Scene 2: Zu mir, Freia! Meide sie, Frecher! (Froh, Donner, Fafner, Fasolt, Wotan, Freia, Fricka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738a64bfdf08faf7b3a1d49b41fc4afd8eb5e60a70c5148a1106b361a7b08d3f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513311 — a six-check JSON result.
Das Rheingold: Scene 2: Endlich Loge! Eiltest du so (Wotan, Loge, Fricka, Froh, Donner, Fafner, Fasolt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a5d4357252139aa7013b68267cf3e7b246a377ec54101b1b91ce679ca6e907. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513312 — a six-check JSON result.
Das Rheingold: Scene 2: Umsonst sucht' ich (Loge, Wotan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9cd3bf51882382d32c0b50a9b1e05e6c6538d6842615d1b05f1b48702a01c2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513313 — a six-check JSON result.
Das Rheingold: Scene 2: Hor', Wotan, der Harrenden Wort! (Fafner, Wotan, Fasolt, Freia, Donner, Froh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e8af2dfc9c856da2c65368ef018e21d45ddc9179149b9b967781f4ab648b91. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513315 — a six-check JSON result.
Das Rheingold: Scene 2: Auf, Loge, hinab mit mir! (Wotan, Loge, Donner, Froh, Fricka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe056ef2d1bd78a1fff8e873d0a03ec2f2667b18dd6d4478adf296114eca7be06. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513318 — a six-check JSON result.
Das Rheingold: Scene 4: Schwules Gedunst schwebt in der Luft (Donner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb434f392a48ef503783b9fb38c4b55fea0ea5a5e5189ed70899acdcb56d96f93. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513341 — a six-check JSON result.
Das Rheingold: Scene 4: Rheingold! Rheingold! Reines Gold! (Woglinde, Wellgunde, Flosshilde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aa65a7393a88fb99d34cd1388e14010440c78ff93e8c3992b81f744d923071. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71513345 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8ba48bae04a38fbd082743febccb5c5d61ea54b131a8ad9ee26f770b49f0fb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330904850 — a six-check JSON result.
Jesu, meine Freude: Greatest Choral Masterpieces
Jesu, meine Freude, BWV 227: Jesu, meine Freude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4e1f643188723b9a917340220b07595deb9a19067443eafc95553a321ee97d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60805901 — a six-check JSON result.
Schumann: Lied Edition, Vol. 3: Lieder-Album Fur Die Jugend, Op. 79 - Lieder Und Gesänge I, Op. 27
Mayr, J.S.: Tobia, O Tobiae Matrimonium [Oratorio]
50 of the Best Classical Music: Schumann
Dvorak: Requiem - Brahms: 4 Ernste Gesänge