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 0x73d721139efdb37b86eaf7ad72ff5ef5ce106a9b86259965cf8fb9e940b26bdd. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1768734-9e6d-4389-ad82-baf709f2ed85.json and https://artists.proofprofile.net/proofs/artist/c1768734-9e6d-4389-ad82-baf709f2ed85.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Krenek, E.: Diktator (Der) / Schwergewicht, Oder Die Ehre Der Nation / Das Geheime Konigreich [Opera]
Die Zauberflöte, K.620 / Act 1: "O zittre nicht" - Dialog "Betäuben mich meine Sinne?"
The Drottningholm Court Theatre Orchestra
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 0x08e4a59d986ce313e3e7d486d948fa614acf230886f47fa0c521d83a45b4e2a6. 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/GBF079242905.
Die Zauberflöte, K.620 / Act 2: "Der Hölle Rache kocht in meinem Herze"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1013465f03973ed060239c7cead421a710024692d569a5ea8612be497152287. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBF079242922.
Die Zauberflöte, K.620 / Act 1: "Bei Männern, welche Liebe fühlen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2259c2584689ef4e842b6c5523bd3953400cebdc4af854acae3f6f916e81ee. 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/GBF079242908.
Dvorak: Mass in D Major, Op. 86 / Janacek: Lord's Prayer
Mass in D Major, Op. 86, B. 153: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254c90657ce08a4b626b2e8205dfe3627b46680e4a2b926b25c21708b1b62e28. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60500801.
Mass in D Major, Op. 86, B. 153: II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b1039eaad0a475a22ca06fa7053c0db166e2d0b6af92ace7c78116a7b5d34. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEAD60500802.
Mass in D Major, Op. 86, B. 153: III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b4f3489003d06f46a4c88665766afc8a0fe06b6467156301bb2703a6b0b37. 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/DEAD60500803.
Mass in D Major, Op. 86, B. 153: IV. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff195c4993e807a49574c92e8a7799485ff5992c47d883e80281dd619527c9b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEAD60500804.
Mass in D Major, Op. 86, B. 153: V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc633378cfa98736b7303a2b1043714e3b8721e45c6453bbfd8ff6ea656eddc7. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEAD60500805.
Mass in D Major, Op. 86, B. 153: VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a788e5d4594e6b9983fce678c1f2d792e6231d2c7eeffaf25464ad9f8ccd05. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60500806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2e811cc72cd1e75e09b09a61627deb5b0edab61ed30abea5599f76b70ac5e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60500807.
Mozart: Sinfonia da caccia, "Jagd Symphonie" / Vivaldi: Violin Concerto, Op. 8, No. 10, "La caccia" (Music of the Hunt)
Violin Concerto in B flat major, Op. 8, No. 10, RV 362, "La caccia": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ad124dd1bf08a844ee7a9a50199f8fae25a0ac7d13e44ae55b5d5cb1993da4. 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/DES380003996.
Sacred Masterpieces Stuttgart Gachinger Kantorei, Stuttgart Bach Collegium, Rilling
Der Protagonist, Op. 15, Act I: Mein Saal ware Euch zur Verfugung (Wirt, Protagonist, Sister)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f90b4c2bb7fdd9c901bd1c1bb453497fb0cd448157c1efa723556034687dd3. 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/DEB260100135.
Judas Maccabaeus, HWV 63, Pt. 1: No. 1, Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d7b3c93a1303f12ce718352e2f29dcc6771beeaaa7fe98bfc0d53203fcb935. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEB909200301.
Judas Maccabaeus, HWV 63, Pt. 1: No. 5, For Sion Lamentation Make
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db12460b0cb3914eea5a5d959a69b08a6f6c7d67c2f43baa095baa21a2a6e6c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEB909200305.
Judas Maccabaeus, HWV 63, Pt. 1: No. 8, Oh Father, Whose Almighty Power
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fc371ad6aeb829a0767b7dcba4e453de9d77d9d4eb69449289823b685a9b96. 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/DEB909200308.
Judas Maccabaeus, HWV 63, Pt. 1: No. 10, Arm, Arm, Ye Brave - No. 11, We Come, in Bright Array
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43e02d20bf274235bf07fd9e1dd6f30761c6f0714e61a01280f99957b2ecaaf. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEB909200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa96b3624095fdb01b31532b07b797a08f45234a52528974a85d1d8979769bf0. 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/DEA809100064.
Lehar: Sterngucker (Der) [Operetta] / Overture to Rosenstock und Edelweiss
Busoni, F.: Orchestral, Chamber and Piano Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d29e1f8a152f0a2ee83b403340d00dc6a7826e3c2a5863a41ab20a62c7f1a1. 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/GBF079440801.
Beethoven, L. Van: Symphonies Nos. 4 and 5
Busoni, F.: Arlecchino Oder Die Fenster (Sung in German) [Opera] / Rondo Arlecchinesco