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 0x21f0a251394698081600096db4776c4228b63fa3aa694483573824d6106b22b4. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12a90451-269d-46b7-a0af-191ba4d76c93.json and https://artists.proofprofile.net/proofs/artist/12a90451-269d-46b7-a0af-191ba4d76c93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Richard Strauss: Ariadne auf Naxos, Op. 60, TrV 228a (Wiener Staatsoper Live)
Don Carlo - Trovatore - Otello - Traviata - Puritani - Giuramento - Bohème - Tosca - Fanciulla del West - Andrea Chénier - Pagliacci - Prophète
Tosca, SC 69 / Act 3: "E lucevan le stelle" - Live
Orchestra del Maggio Musicale Fiorentino
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 0x4404e48fa2199672d3b4abe7f681ebb2a968bc1a2d1721ed391751d37750a7e8. 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/GBF079040311.
La tabernera del puerto / Act 2: "No puede ser" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bba1a1fad3c9144e2d07d24dcb289727485dc983f249b70db1c751db244c89. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/GBF079040309.
Das Land des Lächelns / Act 2: "Dein ist mein ganzes Herz" (Orch. Klickmann) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a102d731ff901ec2124b0bfe52326e9dd8b395045b6ffd035fdb6730943f242. 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/GBF079040304.
L'Africaine / Act 4: "Mi batte il cor... O Paradiso" - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad263ffb34935f39cc2bd69e66e60bbe4d84def9f7207f1db5ee84c2ff70eaa0. 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/GBF079040302.
Leoncavallo: Pagliacci / Mascagni: Cavalleria Rusticana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2be9e12e448339f097109614ec1ab1ffb2c208d65ca716f243f673c477211b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLA508321416.
J. Strauss II: Ritter Pásmán, Op. 441 (Excerpts) [Live]
Cavalleria rusticana: "Dite, mama Lucia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238f02638b2c27ae29fe262a2c4ef817e12c6e20e5fbfdf87212bd9db412384c. 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/NLA508321430.
Cavalleria rusticana: "Ineggiamo, il Signor non è morto" (Preghiera)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e52ab390e23cb42a6605b937ca4b553356b01997f6c97146d69afa1643f501. 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/NLA508321434.
Cavalleria rusticana: "Voi lo sapete, o mama" (Romanza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3c011b67daf35fe6bc361bb13948830d2fee571c0f2a2f2c050a95e130bbc1. 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/NLA508321435.
Cavalleria rusticana: "No, no, Turiddu" (Duetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b6c2b7724b7304757926e04c629452930bf2e166653174f64ad9358cca6338. 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/NLA508321438.
Cavalleria rusticana: Intermezzo sinfonico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5125b2e90edb13650f52b41550e4f587ac234ea02050b9e6cc34712b54877c. 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/NLA508321441.
Cavalleria rusticana: "A casa, amici" - "Comare Lola"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273d9e271e950226b8f02866cfc7080b48ae883b89aadb54f3eea02263efc063. 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/NLA508321442.
Cavalleria rusticana: "A voi tutti salute"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f6a7a079ea9d27e174ef490a3e5ecec1218a5f85ea81a06cb0a953528ef42d. 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/NLA508321444.
Cavalleria rusticana: "Tu qui, Santuzza?" (Duetto) - "Fior la giaggolo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986ffe7e3ef22b2d3a23bda6df3e42969c4f4137b81740c980b6e1fe054414f2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLA508321436.
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
Cavalleria rusticana: "Son giunto ora in piazza" - "Ah! lo vedi" (Duetto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5bdfc20dd20c427545bf16f6587106eaf7845b3cc2b428b3fd9324e656eb1. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLA508321437.
Cavalleria rusticana: "Viva il vino spumeggiante" (Brindisi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aef2053d985a5a287fc193279b42a03b510700a10743a27ee511b71af58a3ff. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLA508321443.