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 0x919e256f622871c994a2ec09c5a44226a11c901aa70f53338cf6fd0404c6d4ac. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de82f860-9ff4-4d6d-9249-0908f9d4866b.json and https://artists.proofprofile.net/proofs/artist/de82f860-9ff4-4d6d-9249-0908f9d4866b.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 0x404e82f9a1ea269729bc91505ba1e0c266770bd6700fe087640e4cb3af52b480. 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/FRX452148937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc30616d7bf4139d1ec57346272d0758324699bdec4a72def84a57b88b721f44. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRX452148938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0525f03cc9bd5d2a2d9434b5c054ad1e0eef29961340f7ac3ec93d614358950. 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/FRX452148943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf28021939be6909616c8c1f7c26fc5e96436d97e529d93a22d0a6a76ef84064. 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/FRX281563946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bd45c06975fe146d16209b84182b1fa3026d4b84e9d85b7ed4bb7429183ca3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRX281563947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c8b6308ab6abb596c74c6b04bd28907ce089444ac784aae5d80d508399e692. 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/FRX281563948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fdca1ca296988542506e9006ed7d82fc5caa8847ebe1cde8da4bcf1320c46d. 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/FRX281563950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8dd43f9b21cee454274de21057306c9a4e9eab89986e7f0e5630d8064067fb. 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/FRX281563951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7c782fb34e4e23c0bf4050036e3a3116cf2807f44651f13294e1a97d50aa0. 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/FRX281563952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea135e120ef8f78b72baa6b68ef532a2afc99de04755905b54ecf5bc7c3fe538. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRX281563953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26946bf50e73170373063cf94fd99324f5e87d416f3f5cac691bf8c621c7efd6. 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/FRX281563918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9171bb67ad9dfaa285f82c1d6f641eb9fdd816052dd23b79df7325b5fd21618. 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/FRX281563919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc763130ba747c4e19f0da15238f08fa51a5c3f996cf0194ead23e695cee3c9d0. 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/FRX281563920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ccdc0b4b7191201634b256bc0fe0ea090916440b2187dd454778559c42ea2e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX281563969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0eb9aa3cc4d8a378cb57bc1d29f52073456d7ece79a6d2ae137b396b1347fb. 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/FRX281563970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd630b2a6cf610a1a2e38a90a9e84c0a5e1f862e91ffaa7d53834772cacb971dd. 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/FRX281563971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317e84a8392356a04428d058f6c45123ca56cc048612320cb5c7509326ba7d2d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/FRX871509955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad03cd5b74febddaf11d008f790808d31696c2e0acae434857e9eb591241f8a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX871509958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e67070036a2e5ae6610a3a74d96aac4b9bddfd804a95953bc0220c1cd5816a7. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRX871509961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b2be4d32c189be6dd167bb9c618f01f1f9d29a4a5c7934e16b74a034eedbef. 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/FRX871509962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca82ed3a36801562d1fa96af099da5d231dd727ef11d977c3b82c32ed682c455. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRX871509973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53f5e1c93123661efa6ad957cbb1792ac4b597b0112cec7d3e2b21695469759. 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/FRX871509974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8e3ff79b236b0ba6936f581fb9189fc10e8250f291766d48ad0809dbcc3f80. 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/FRX871509975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822d7bfe1efa773c28cab739c7cf5e22da034a78b0f80b6d7dedb46e57a75310. 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/FRX871509976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfd7dbca0fa8cb135c715c5d958dc820debbf5eae9100fe44f245815d4fb333. 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/FRX871509978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fe26c0fb50cd32c53f8eef0ca7fee001723b00c34658ab9326b711d75095b3. 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/FRX871509979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8772ee5bac3b7acd380dcd64d6c65dea4ec8b0a64bd6ab87af2b6defd0842693. 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/FRX761529521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bd89295f310d5cb0d25a32786d6c8c7475df122294929a70cecde6f0c54e53. 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/FRX761529523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b997e9997b9c9094c1c8b6820abb4e23b38aab0a50faf5d0b407956f8cfc134. 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/FRX761529524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecacf6bb20f99ed2ad0b1e7d677c67d6924e1724dd15e11225caca3882694244. 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/FRX761529529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e36b3d7fc5aa16361c12fb42f8b9bd50c476e4862144ae650a2a876c24eee7e. 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/HKC992324065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971ec9504d24a6c7b2b054b413835b7debbdb08d45cf180a71f7755dd0656b59. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/FRX202121562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266943dedea38ede5a83f574203002c9b6b559c857da18d7f46e307c00259867. 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/FR59R2141766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a18250a87983199bd5178947fc75557a0e7e7f9e4d5e96a8021a91c48057aeb. 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/FR59R1665983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb287549704edd336def7cb9aea54306ce89885c22acf6fabbc20cb1d8805785. 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/FR2X41647269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c8c5a97e06c83b0340312be1c0ce0e9243cb1b476ca6a6618d8d01402e9110. 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/FR2X41510486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e8a66eefa9f32d72585a830bc19b5ca20dc121c306d0f9067376b7276eec16. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX871574320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02999e4db8f269c0549bad07c6824fa106c4d9d91689b126a58404f0a8592e2. 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/FRX281563956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4b9de619614a0021584b8f04c08508a8b2fbf9e98b193e2d2080d708fd6cb6. 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/FRX281559704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b93187b7b31b6c958e7a99626179d502576593e4c678e017f9d65018a06e92e. 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/FRX281589370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779be404b03cdbeedcdb12dfbf638d35eea1a36eaaa3c2cd6ac8f053afce7f47. 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/HKG732137872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0478d7ef1e25f242295c7dcf3b1e4c21a9dc85fd0de8eeabb8f361993fbe3bd6. 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/HKG732137873.