Ermanno Wolf-Ferrari (born Ermanno Wolf) (12 January 1876 – 21 January 1948) was an Italian composer and teacher. He is best known for his comic operas such as Il segreto di Susanna (1909). A number o
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 0x07aee562c7c65ef303bf898ff1936d310b4688e7ad4293e5dc0e104f2500148b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/904c35b3-cbd7-4b0d-8010-622c64ecfb53.json and https://artists.proofprofile.net/proofs/artist/904c35b3-cbd7-4b0d-8010-622c64ecfb53.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23277a1f34bf9b0bc0f38eb3f264555bc9fab409d70656025598264c14f6e7f8. 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/DEF056731406.
Das Rheingold, Scene 1: Weia! Waga! Woge du Welle!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bb7dcf9464ce88c51e3d31d1f3cdf50e228e5009fbed145b57595db3131cd5. 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/DEF056731407.
Das Rheingold, Scene 1: He he! Ihr Nicker!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639ce8a7e432edbc07e50606ff5c70ed2ab4f48605cec6934c57de25f9f4dda8. 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/DEF056731408.
Das Rheingold, Scene 1: Garstig glatter glitschriger Glimmer!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d06b48755e7a4271e66fe0da6565defae2d0099e075cc93c9fc63564197f0f6. 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/DEF056731409.
Das Rheingold, Scene 1: Lugt, Schwestern! Die Weckerin lacht in den Grund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597e5345f2930adb9e2929a34d6aa2759bb3b42822ff561bc27ef93137d406c2. 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/DEF056731410.
Das Rheingold, Scene 1: Nur wer der Minne Macht entsagt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade3da8927f63d958440e0fde80c41f774bc5df132fa616d594aae05550500b0. 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/DEF056731411.
Das Rheingold, Scene 1: Der Welt Erbe gewänn' ich zu eigen durch dich?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a5a7960ac5778eaa534434a3535beec1aa3ee6d76708da10e866c41c588765. 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/DEF056731412.
Das Rheingold, Scene 1: Haltet den Räuber!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1eb34ec0512c234435d19c8f5be1eb352360363f643d2440b1dbd02c331860. 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/DEF056731413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3ca4bb51a3da9b14cbdfc570a29a645159baee37c4596d3a890c2af226d261. 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/DEF056731414.
Das Rheingold, Scene 2: Wotan! Gemahl! Erwache!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2504b214c0169c03148d634cf956c6a9ac077018cdf3852238824995274005b8. 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/DEF056731415.
Das Rheingold, Scene 2: So schirme sie jetzt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96299ffc781278e1453ca008516af50afd9a285533fb2ec64c3bd9d8b7fa461a. 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/DEF056731416.
Das Rheingold, Scene 2: Sanft schloß Schlaf dein Aug'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6770fcd7d2061f7e0cae2d357ae110b90039d1c4e25092b48887c1948c137b74. 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/DEF056731417.
Das Rheingold, Scene 2: Was sagst du? Ha, sinnst du Verrat?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90a6bc640c26cad0afa3e56634d2dace61f57950ba11d416ae070b9cdce918a. 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/DEF056731418.
Das Rheingold, Scene 2: Transformation Scene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2058ceafe4a2c6779738284a6d646c05d15c8e67b9f01a2b9d8c79372ceba9. 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/DEF056731426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7ecbba695eee12c2062e4344cad2c825a0a8f91b593cf133e99ee7bbb05e80. 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/DEF056630010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5909179a0953c55c0471de53e8e0e773bc9c45c5fe892ffa96cd05085fd27229. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USX761425020.
Violin Concerto in D Major: 2. Romanza - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8503d8d5d613fcc4167d2a5270675c2ea4e6b0b2c6411a9d95075e2950541062. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITUM71701060.
I gioielli della Madonna, Act III: Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eaca89f628de31637781ba9bf9d131cab3832c9c6ac5939562a714e33f6fde. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEF056701340.
Suite Veneziana in A Minor, Op. 18: II. Barcarola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96c102c50b9b6bfcd7a38a2e6ee9e2e828fe1bdf727124a3a0fb3875dea7dbb. 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/HKI192134602.