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 0x0315b905df121fcc519992013443aef353e65bd8310d6fff808c56415773c8a3. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dcb31ea-b0e5-490d-89d2-629529970237.json and https://artists.proofprofile.net/proofs/artist/3dcb31ea-b0e5-490d-89d2-629529970237.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 0x9d4200f87af9c2e6938d950ab071d1ceb9e7cf78aa8e66b92ab4472fcb3d8e68. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USJ3V2040267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb126a2b18e3c568311cc22bbffef2faf6595e3dc01328bb669a8d69db64f1857. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USJ3V2040268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6c9d196bd1be264236f801dec1204f7f835dc4f94f4f2e99b9eb02a2f55f62. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USJ3V2040269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b818e6ffe1ec8b6ae2596e77ad018edec04267ed94e185843828adf37d941. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:56:51Z), 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/USJ3V2040270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6343a7efa98a25376f3e27c38bd7b839d7d6aa69bef938a8920221afc074620e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V2040271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5945ac0d237b75eae0c0f84d6efe11a61f74f6c438bf001de37438a72f69e4b. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:03:34Z), 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/USJ3V2040272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255006d17fc54d1c19440d48f0f038fa63731f55740bc068040c81f620f40706. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V2040273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba27b206ea9b915d81333b1f0103b6264953af4c066bd049016666f8c74051. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:59:31Z), 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/USJ3V2040280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4acba4341e26af8f8d67068c6b4aa588a94422e1e05bddff30e6735bdedaee. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-27T13:26:04Z), 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/USJ3V2040284.
A Leibedige Chasuna Mit a Chassidishe Geshmak
Simchas Beis Hashoeva in the Chassidishe Velt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27519c7ea9e658a8585ee648683ad4ee4f0210c90e6f68bdd853e9910027bb66. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJ3V1809987.