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 0x70c13157360224aace710f380efdd5ff35ab74e55e4f5ba33bd5ab45e48de284. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79941e4b-6204-4c84-b608-04439bd29a54.json and https://artists.proofprofile.net/proofs/artist/79941e4b-6204-4c84-b608-04439bd29a54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Die Zauberflöte, K. 620, Act 2: "O Isis und Osiris" (Sarastro, Chorus)
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 0x3377f10828dc2b1aec9a1f92581865a7b0779dfe408c94695afe4f2798adb11c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC9001019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83981c6b55f31b9825006a67552f2446d8e7a5097742ff824e391585987bceb6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBAYC9100183.
Die Zauberflöte, ZWEITER AUFZUG, Nr.10 Aria & Dialog: Aria con coro: O Isis und Osiris ... (Sarastro/Priester)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377f10828dc2b1aec9a1f92581865a7b0779dfe408c94695afe4f2798adb11c. 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/GBAYC9001019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83981c6b55f31b9825006a67552f2446d8e7a5097742ff824e391585987bceb6. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBAYC9100183.
Symphony No. 9 in D Minor, Op. 125 'Choral': II. Molto vivace - Presto - Molto vivace - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b826edb08a824783f837c87ed94bd3925fa89fdd13e8adb190c66f43ed61919. 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/GBAYC8702994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377f10828dc2b1aec9a1f92581865a7b0779dfe408c94695afe4f2798adb11c. 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/GBAYC9001019.
Mozart: Die Zauberflöte, K. 620, Act 1 Scene 13: "Die Weisheitslehre dieser Knaben … O ew’ge Nacht!" (Tamino, Sprecher, Priester)
Sir Roger Norrington/London Classical Players/Anthony Rolfe Johnson/Andreas Schmidt/Dawn Upshaw/Guy de Mey/Beverley Hoch/Olaf Bär/Catherine Denley/Catherine Pierard/Cornelius Hauptmann/Nancy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ead786a04f955bd600fb90d6a4c55c5fc6b07b1fc791639021545cd1b73c9b. 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/GBAYC9001007.
Mozart: Die Zauberflöte, K. 620, Act 1 Scene 15: "Es lebe Sarastro! Sarastro lebe!" (Die Gefolge, Papageno, Pamina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f5b270da45f4e14b15328a2ed0091bf2a7095aed9d0a56c148e251ac83e3c7. 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/GBAYC9001010.
Mozart: Die Zauberflöte, K. 620, Act 1 Scene 17: Chor, "Wenn Tugend und Gerechtigkeit" (Die Gefolge)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ebf9cb58425146b362fc7826c4a82f26d7da680f8e5c0b486899aecae7bff0. 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/GBAYC9001013.
Mozart: Die Zauberflöte, K. 620, Act 2 Scene 5: No. 12, Quintett, "Wie? Wie? Wie?" (Drei Damen, Papageno, Tamino, Die Eingeweihten)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be8dcecca5d099ca365bff3d55f027e0064963d6464c45bd02df4570eb90126. 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/GBAYC9001025.
Mozart: Die Zauberflöte, K. 620, Act 1: Finale. "Schnelle Füsse, rascher Mut" (Pamina, Papageno, Monostatos, Die Sklaven)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ed237cb0dad36467ed6c4e7b00166fef2acc8654554e6762ff70cae9e25065. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBAYC9001009.
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
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. (d) Andante maestoso - Adagio ma non troppo, ma divoto -
Beethoven: Symphony No. 9 "Choral" & Egmont Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3070daf9af3d4bfb1c5156eaf5dd56b7e22783aed6c0340f4fa09a8394321c21. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAYC8704232.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. (e) Allegro energico e sempre ben marcato -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec971b80f0b57d47396a8c93db7700107779d87a03764ed21c54e2ac98a7ae0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBAYC8704233.
Mozart: Die Zauberflöte, K. 620, Act 1 Scene 17: "Nun, stolzer Jüngling, nur hierher!" (Monostatos, Pamina, Tamino, Sarastro, Die Gefolge)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b0cb0d4c03c06cee8413f6abc8dd4bd8390cd55c1728282ab343c999790623. 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/GBAYC9001012.
Mozart: Die Zauberflöte, K. 620, Act 2 Scene 20: No. 18, Chor, "O Isis und Osiris" (Die Priester)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75db8e0e9c94272c4a95a088946327b5a40574bd63ac9f1724d431b664171993. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9001044.
Mozart: Don Giovanni, K. 527, Act 1: Coro. "Giovinette che fate all'amore" (Zerlina, Masetto, Coro)
Mozart: Don Giovanni, K. 527 (Vienna Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c25be5c34980c5c75c8a4587eaee28d629a2151ade9ba52f8f8db573f2dba0. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBAYC9200862.