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 0x2b06314ff3be3136f2f8d7100be503ecf71e1887e19362205338d9d19d8c3e10. 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/3a3a1429-171a-42fc-b49d-36c8582f8a65.json and https://artists.proofprofile.net/proofs/artist/3a3a1429-171a-42fc-b49d-36c8582f8a65.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 0xabc045ac6f4c475d6a206cd9c57fa245fb808d451c4fe5721df6ffc9e72c5eda. 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/DGA0R2315142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3734d4f260a02aa2f1213c902b39c2dab7c30d18cbf8dd762d035173e5d473d5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKG731681718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb407193f86b032e77da09a8ad2d0c59920012b171b389d21c1b0abae9f58cf91. 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/DGA0R2326928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e6cd5be1cbc700d2c5e4d3258ae158bb7c053efe863336d5b5314b71ab7cc7. 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/HKA412300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86564407e4cf7f32996fcb7df9ade0aa63ff0787c946a3978fb996d848ee315e. 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/DGA072334250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cb1d990a7fd92e2bbd1b7316446c2fe1836e1d04f4dc979f30de6607bacd69. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DGA062344395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4cd50af714cda777cf7b4e1a01ad9df17c57896d88f8e882556a9281cd97e8. 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/DGA062330578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d9ae24aab2d575e2d2958b04fdc634d453a20fbf317f325876cfee51178965. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NL8RL2420332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8250905713b23ded811a57c6513dcb5747a6bd40f738ba13ee2d8aa52b0d1f23. 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/NL8RL2420331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd54b1ef572122b552c75b58d53cd435bf6219f7e074b7fab9bf38b4e69824d0. 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/FRX762312124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e621fe849765b147948359f8e472c1addfa639d00b6aef00d240eee2dac171f. 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/TWDL72302233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b149a21402ca638efe6f7a1be3c6c3fabef61c21702bd27d720c9d39e03ba2. 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/TWAV12300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d7769c416c301f6676561ffeebfbba45a7a7d121f83fe7e03843b9d22f9b91. 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/FRX282311929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beac340226f95d7aa238edac13a63e7751512cb55e3b3543db0a62b2be2b8d1. 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/FRX282380207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170cadb996e689481a577188590792f3862ce42e26a7fa56555ff82da3b5639e. 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/FRX282380209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbe46fdbccdc650b150f351590cd4218f310d226e7b8c8ab0e6481a06c10bb9. 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/DGA0R2340152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb02a1bb60b9b3afd9d59e237ff81053f3d7fb3ea0846204286d5289e92a4344. 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/NL8RL2420288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a5d3363e8bee97bc0547f2015f006e47de3c3fef9049a221bdebd96dc18602. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/HKG732314120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abf3b8ff887a9b98d278599fefcc9a7b15b55718727ffe53e64809ae9f502f4. 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/HKG731568263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8657f26cc97c470cceb69e73ad7e4aef632b2b43de92c73e1e9a30455d44c0. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/TWAV12200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4f952732ce419aae7bd4e219137bdd8d8eaa46b799ada57c7215f73b44a3af. 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/HKG732253504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7accdc01a512b4b0f2790a43b1b5ff4c9b2771b8a0265e43e5d3bd24af468e85. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NL8RL2420282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5891e1739d450c56b3f27e808885c012c8c6bde581df9a53ee84b91fe10500. 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/HKG731793152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7164c0e124e077e660a7940e2a4cd9b46ccb8c3f6d7b5b905551400fcf300190. 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/CNZ632200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc6eb09fea2cb7d7c1d7780733857f441492d6d725ab4c298427866ff86736. 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/HKG731726358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4c577587e1f4f6591403c9e86e77b99e3fe8a5e2aa15db8754f29690a9ba84. 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/HKG731874547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4809006e22fb81a6e1651d270b4da5db25e072911ad40b5de9292f2da20ec507. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG732149293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3209118b2a0f0b0a386f3a7c0d3ad2102e936a77e6b7d4b3ab57a1ad63dddad. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKI112110467.