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 0x4ecf2bf1a60be5563ec7648f18f388f01e98da495fd9d2d94a63d6cfef5abb79. 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/18c29e16-7843-4200-af05-833d8418c4f4.json and https://artists.proofprofile.net/proofs/artist/18c29e16-7843-4200-af05-833d8418c4f4.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 0x0efab158fd05c55fe6a246f0e3621c8862f71d8c0b0b1df8e70a68305efe1e04. 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/BER189927301.
Canzon sesta: L'Alcenagina sopra Vestiva i colli
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aea5de8136637e645307a0193d9713622765ac5d3b6dea7362a00ac8d526ac. 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/BER189927302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aec4acf8a0aeb70726bc3cbde99b0751c90e29d09b95f9334b2ac344d5bb68. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BER189927303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd059eff70ce646618f056065744fdfde5151c0cbe22adc8bc35a7c4407af29. 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/BER189927304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e41e2ba567125242e3224e0a1ffb94315a2c25e380b1e86f57ad29029f932b6. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BER189927305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e1328f2c00c7429cc8f6df52806f23c26ad32c8f66167dc960b2b9c4a7995b. 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/BER189927306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c31e0e1ab4a8cbdf9720d6554a090986809566ae92fb9eaf89413c3d53d2113. 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/BER189927307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e36ddbf1b72a5b04194fbf41f2f791c487a94ce845400b9ba320f756ac5273. 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/BER189927308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb063e204461f411b47bef1f6649d56da4355fda4386b848413631a901ab8624e. 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/BER189927309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb5de11ad356de287b7cbb3e4e5b26e5104006b5c1f38695156ca0f728783a4. 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/BER189927311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d9c2b6f42ee0ee592398bff12b817c9d2a5b659088017dcf724d7aa76dfd9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BER189927312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1accbed32b1a36542335c5a0a1c6ad35829d3e03a1726cb02f59b016985c2b0d. 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/BER189927314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040f64435d30459c09174315e563e0b732e6124018c144da0923cb0a40a1f21. 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/BER189927318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16907474ead7ad79e3c25898b238b560187eb88cc738d91e61e5b32dd3e02261. 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/BER189927320.
Krummhorn, cromorne, storto, tournebout ?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788c8aa8b29f33073f84896f66e21a4e63a60fd31a7dafe120136585809614a6. 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/BER180726201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fd8b78d275dfa94ae15e97f14812a9e248f4604e5e129ae11a082d4aa65486. 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/BER180726202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a609c42ecde376d569828dcac7fcde4ee0641ca5ce91b1f8c99a27f71a5164. 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/BER180726203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a970e4b7d446da87b21882641eeb9d9a56a0695b49781a9716f25f76f83c7a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BER180726227.
Quartet in D Minor, TWV 43:d1: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb801203c24640e207355e8d9be107fdff84dbf06df5e4b14de407770a4b6cd5a. 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/BER181031401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb95358c05112720dc1a0cd5aee4b16f19095f2a33cb12d87d3b9c99e503e056. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BER181031405.
Sonata in F Minor, TWV 41:f1: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ebd141b917977de9fdd995f4f3df4cc664bcc153e9e887a7b76082b99773d1. 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/BER181031406.
Fürchtet Euch Nicht: Bassoons & Bombards. Music from the German Baroque.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea9f48c2b959764e1a34b49b6c9167305605d3fac8ba7c2e3bea5ed34a5c33. 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/BER181942002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc3c6a2f4824414c543b43d6a5cbf3ce43f8a6c58d662c238829664c534d19a. 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/BER181942003.
Fürchtet euch nicht: Bassoons & Bombards, Music from the German Baroque
Concert des grands hautbois pour les chevaliers faits par Henry III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8267a7f324e8a8b16512b606a46796d0c1c41af9f65d9b84e6bd6aef4d87b0a9. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BER182143901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85b2cb6a8596ec6ec04145e849a7e0a1db6163ef5a5328efa266fd64fee96b8. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BER182143920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0892ebfefbfd234a49b9690d86f1c8d0b4a79a6d456d428193a7bbaa117cecf3. 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/BER182245820.
Deuxième Suitte in C Minor: III. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27c6a666fc27deeb3ff71c5a25a0bfffca422af79cd117ea6e71e8f52a4f1db. 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/BER182245824.