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 0x618c09f6f6979804f4472029acca68448c82b242752bb429fb783a2e4da9b8cb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f59eb202-9f47-4f10-a651-e8fbacbd3dc4.json and https://artists.proofprofile.net/proofs/artist/f59eb202-9f47-4f10-a651-e8fbacbd3dc4.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 0x1245602033e7c7a0cdbe490e38ab68dce9aa4d0f91190bd5e62a967c70b5edab. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1154002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c586ffd01db261cce8c574653523cae38cb888ee2ffd691c136e05d0580d41. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ0200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114580b5ab11dac5ff184d90cb0efdd67b5dbf0c19b1a5daf2a3cbf3ace31803. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ0900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b7f0f5fde877f3a6befef12355d5293e72fa85c33365bf8b3cae4af6af5ec9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190567113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e42e1b733f84a0d971ff483b141191b360d055da13197aa980eff7cf46d5e0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1150702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0883f8dee07c872a153f7de8ab1da23cafd241612c8d1d880a85481c59e9e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1154009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64b0cfddb3ffffd060e204b1fbe9d4681c7314294ad7d8cb0be194e34d7bc4e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBA04004002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82f3b4c63cbf000e9c2aa46e7c184af33844280186d5f0e64bd9668d73ca1d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1153910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031bcaa1ec69150c2cf7d94408462e7f504c1ff4f8f3c0b555b6b1e7731a8996. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBBX9100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a50f17138de691c27561cea2397ab5282b04caedda0de853e0bfe6e82a73da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1154011.
Frösöblomster I, Op. 16: VI. Vid Frösö kyrka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c840e53809f73518ce2d4644454e5a9f087c5384230b1d8f9dc67a8cfd226d5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI199992903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf400922ce371c62a066eb2812944de3d3d85ced894d878393c377a68be33388a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1154003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3b827a38a67b5abb6f00fab1e646ba5e7cd87e367d08b4cacfbf09ddae1bb5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1153315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38af2cf50f67f07c0dfc39aabf249b79d1499b796e00ddef25be915f0b7ef68. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190967705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc065ef1df14f93bf8e050a41113a6d4b37e126addadf5de1f67769ad2e5f6e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190567108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46907e55965d7907091911a87828c86e891d81ca799461f45d85b1135c2a3785. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1154001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6072462505ce663be78fcfac4c1ca113034d4759bed7edaf9217d9ff5e72660e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEVOZ1154007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74553335ddda973f2846d5c44a2e2254503955e5caa7ad857c210d507476f9b3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA1305405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e635405856d1e784bde6d060db5b290e2870db2dea925a37aec4459aa93fa3e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA1400617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef7e90eb834d1056b57ba52e448c63fd69bcf13e4ba28992e7dcb7229d48a7c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEBAA1202101.
Sound the Trumpet, Beat the Drum - Welcome Ode for James II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b740b58953a6c67cbcdebae51251257f4d2662415a2efc499a261a5a4a5908e. 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/SEBAA1202103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcf83bc4e2f762159cf035ccdea6b2d1ff33663da09aff2031f83717041f6bd. 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/SEBAA1202104.
Promenade - From Pictures at an Exhibition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de9867626affe5ed64eb14c769881d9d492c672163f79ce5f5e851a04bc3f08. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEBAA1202105.
Moonlight Sonata - Piano Sonata No. 14 Op. 27, 1st Movement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7243944a338143825254805ee6d131d42e09782f398b70486bbd40a71ceb7fee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEBAA1202106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a417833ba1a6614bc9bfce71e4e0594ebce7325e5be1d5a9f330d716065df3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEBAA1202107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10db68c1fc9255adcbe2748c6314f994cb12b90d19973dcf2dcf7a254336c04d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEBAA1202108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1585437da6adf4623ea1dd71270954d5dfdc8ed2d63a85d92a79e0bae9ae5e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEBAA1202109.
Lacrimosa - From Requiem K. 626 / Drick ur ditt glas, Epistel No. 30
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f1e8f2c17e61a7bd3bfc493103a7d98c66310fbc62d74a12937b00d0b55f39. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEBAA1202110.
Air - From Orchestral Suite No. 3 BWV 1068
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9661f6b8caddbd7c850b62fab605e0e4147279e26ed0a3559dfb064c3ff936. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEBAA1202111.