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 0x7e4fabd62a2763d5c50e3c5ee003faa249c200b28436ba818a454f946090a029. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/705d7460-f45b-47c6-8e16-555644f423d1.json and https://artists.proofprofile.net/proofs/artist/705d7460-f45b-47c6-8e16-555644f423d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brahms: 15 Volkskinderlieder, WoO 31: No. 4, Sandmännchen (Orch. Mackerras)
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 0xbdc09bd5c6daf9a435f344fee790f8d4f18773f38f20e5d87964b35fc3d53972. 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/GBAYC1502967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13214491985897dd7c6ed158524ea9b8929bffca5bf6c6d356517dcb5baa04dd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC0102941.
Mozart: Idomeneo, K. 366, Act 1: "Quando avran fine omai" (Ilia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d79e0a38631bd38192597a2e2886cce45424cf7bb1242af5817ec4d4ee2e86. 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/GBAYC0102944.
Mozart: Idomeneo, K. 366, Act 1: "Padre, germani, addio!" (Ilia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943c437ac2ce53c2d5af941d3fbf17b7c2c8e74b03ea4bef3f7de41538498288. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBAYC0102945.
Mozart: Idomeneo, K. 366, Act 1: "Radunate i Troiani, ite" (Idamante, Ilia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47669963f1d8ad4b2f3110c2c16c328026ce833b0ef5932e37b692b1aebd3ce9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBAYC0102948.
Mozart: Idomeneo, K. 366, Act 1: "Non ho colpa" (Idamante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b5a10cc463a7049f9e9422678e8d3074e7e4d8772dfda2b8507b34d68ef123. 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/GBAYC0102949.
Mozart: Idomeneo, K. 366, Act 1: "Ecco il misero resto de'Troiani" (Ilia, Idamante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb491ed4cab7d1346ac4f5ee3cb56854abedbb6fe32568d1960cacc412903be5. 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/GBAYC0102950.
Mozart: Idomeneo, K. 366, Act 1: "Scingete le catene" - "Godiam la pace, trionfi Amore" (Idamante, Ilia, Coro, Due Cretesi, due Troiani)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8f756e486f3940fa7a329b554e8861f23d21b15cde9801f9008e8e69122dfe. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC0102951.
Mozart: Idomeneo, K. 366, Act 1: "Prence, signor, tutta la Grecia oltraggi" (Elettra, Idamante, Arbace, Ilia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab8aad62875384c22d69a2d8af58d7735dfa48a78c731b15cac35857b8ad7f2. 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/GBAYC0102953.
Mozart: Idomeneo, K. 366, Act 1: "Estinto è Idomeneo?" (Elettra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed535b9ec202299cce059935089e98981a9325a036ca88dda2e29c3c675f0200. 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/GBAYC0102955.
Mozart: Idomeneo, K. 366, Act 1: "Tutte nel cor vi sento" (Elettra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59db148c22d938887ba643ad916f9ceeec7519bed2a8cdbe7c0e7252fdeb5c8f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC0102956.
Mozart: Idomeneo, K. 366, Act 1: "Pietà! Numi! pietà" (Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0807c09a29a6c705bf89f045b51ca28d4510755c81b37cadfaf87768a96c462. 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/GBAYC0102958.
Mozart: Idomeneo, K. 366, Act 1: "Oh voi, di Marte e di Nettuno all'ire" (Idomeneo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8fd5f9128a243ae68c5ae7fe24728fe5d5ee209114103fcaf5ff181d8287d7. 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/GBAYC0102962.
Mozart: Idomeneo, K. 366, Act 1: "Vedrommi intorno l'ombra dolente" (Idomeneo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d518eeb7fe086d8259fe835804fcd644900f294cf2be5d018eb8301545a255. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAYC0102963.
Mozart: Idomeneo, K. 366, Act 1: "Spiagge romite, e voi scoscese rupi" (Idamante, Idomeneo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5fae14be2667c8230f42e0b448d2ecdc71f46ae060c205cea98965b787bc5c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC0102966.