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 0x6ef3512b029eba1829677a3b4905e341477da2e64389d0335f7349685efed692. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0443091-cd63-4e33-95e8-377092fc4ec6.json and https://artists.proofprofile.net/proofs/artist/e0443091-cd63-4e33-95e8-377092fc4ec6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xaecbdf67c94b4f2723c5b69cbe29bce93fd271f852d7b330457ca50cf690d549. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/NLY331305892.
Euryanthe, Act I: No. 1. Introduktion "Dem Frieden Heil!" (Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e75cac3438a7255ae7cd823ffd6466d64ca7016f4f31cb6594fe8aec4df21ff. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLY331305893.
Euryanthe, Act I: No. 2. Romanze "Unter blüh'nden Mandelbäumen" (Adolar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb829f90d672f1c878f734336694390854459cd726ff1fc05c0160c2bc544d26. 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/NLY331305896.
Euryanthe, Act I: No. 4. Terzett mit Chor "Wohlan! Du kennst mein herrlich Eigentum" (Lysiart, Adolar, König, Männerchor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38b2d4275840980dcd1fbab92cd846b399f63cfd082f5e17f91045e90a23f23. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLY331305898.
Euryanthe, Act I: No. 9. Finale "Jubeltöne, Heldensöhne" (Chor, Euryanthe, Eglantine, Lysiart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd315ad613b907b129755f07da783d03365af4125116bf24481d5123461a8b4. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331305905.
Euryanthe, Act I: No. 9. Finale "Fröhliche Klänge, Tänze, Gesänge" (Euryanthe, Chor, Eglantine, Rudolf, Lysiart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143bc2b11fa19da652a8a37365beb1af0d300292b179fb22835ab0bf59f28014. 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/NLY331305906.
Euryanthe, Act II: No. 10. Szene und Arie "Wo berg' ich mich?" - "Schweigt, glüh'nden Sehnens wilde Triebe" (Lysiart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4615a396e2033ca0be76e060fdd0f78303eb1258a32e048f04f4befe31d8fb. 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/NLY331305907.
Euryanthe, Act III: No. 18. Jägerchor "Die Tale dampfen, die Höhen glüh'n" (Männerchor) - Rezitativ "O seht! Die Schlang' erlegt von starker Hand!" [König, Männerchor]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a302fada306b7dda02e534b46c2bb6960794d0aa821913591c3a2d2a8de1d3. 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/NLY331305920.
Jacques Offenbach: Orpheus in der Unterwelt (QS)
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab1fef0b9913180e0ae985f8c8f91814ec82768a12c8ae66027f1381fcf2f34. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEUM70603587.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Und wieder geht ein Tag zu Ende - Die öffentliche Meinung bin ich - Ich bin die Frau Eurydike
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cce6859cc978b308b053982d1ee407a4a66f9c80009ad5e488ae1457e186cb. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DEUM70603588.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": So ist das? So? - Ja, mein Coco!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db4de4e4acca6e0e6ebed5fbe5e5cce08a0b7cdb40e6ebaf7fd8493fbaa26ee. 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/DEUM70603589.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Du Verräter, Attentäter - Ja, die öffentliche Meinung, die dein Treiben überwacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cede08c5a71e782756bbc3429cbb8c5e5107df7fe8edefde9509547e6779919. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM70603590.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Eh hopp. Eh hopp. Platz dem Merkur!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa38fc1eefdf07d876de4409dab413835cf75b2741426292b1b3c32bd881fd. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEUM70603593.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Um die Alkmene zu verführen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bff5851db7e2ac4f262b2ea7d6acbfda3a08dd77c7183ac5bb9e211eebdf63. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DEUM70603594.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Ich kann es nicht länger ertragen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdbea8f0356aa5b3b8ca4becc99ca2321e68885a73d2413121307696526e4c0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEUM70603595.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Als ich einst Prinz war in Arkadien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1b1762026e253b88baf61e20aec5c49d013ec8db04ecd873f9be47838ac63f. 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/DEUM70603596.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Willst du partout dir ein Weibchen erringen - Ich glaubte hier etwas zu fühlen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9346da9f6f6709e47282d80a9ab8eb781b870c26b54b92e3f091e0da71f8c3f2. 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/DEUM70603597.
Orpheus in the Underworld (Orphée aux enfers) - arr. W. Neef as "Orpheus in der Unterwelt": Jung wird man dabei!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a96f7b29badd8f42d40f794e9a03a4f87a780bb664179598c9d4a484a6f802. 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/DEUM70603599.