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 0x9eaf3bf379a82f9f971fe559d864e23a5028b46b6eb911c9ea50e185f69f6bfa. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/006feca5-1405-41e7-a22f-bd309859226f.json and https://artists.proofprofile.net/proofs/artist/006feca5-1405-41e7-a22f-bd309859226f.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 0x362082615a64d11ed4d5db864ecfd552e4425ed200e24fead1b68facf2261d76. 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/SE2VC1900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd640ba2fb9144ed4c51119b592190c894f8bb047402836e84ec49b801984f8ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE2VC1900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc9fc10dae23e0b0cea6f8a9408fb83523637da15e25b279e9914922d6e0ce6. 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/SE2VC1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445882f05b9aeab18e25d373268aaf0476ae2bf76ec08fbcc75b832fcab4ee3. 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/SE2VC1900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3d8119667741a090006112847c8395fae14cf525efbf1198514ad5e1c58c67. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE2VC1900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568a95dcba46c099e06461dca57919b1b6cc5f04e0642db320cfb3d8e4ab882. 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/SE2VC1900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119dc1b0a4b9ccd5b87bdfdf9b44983b12ad0d6678fb0d6c4d31c84cfe48a45. 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/SE2VC1900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c71af9c42169617fd7e489f2a7ec40a42e172bffd2b5ce73011eb3c4b6d364. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE2VC1900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ca6ea13ca35d74491ea1bfbea3a1d72c45db520a5ab9b8f758c1e61e8d840e. 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/SE2VC1900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70086eb7a4a70111b1ca18516e9d796c69328a50431b25a971a4908d922fceb. 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/SE2VC1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ee584c18990c35f6fd26f6fca578b4ceb642bd04094d3515d3bf40417bed7. 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/SE2VC1900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0517f07b292423813804230f69c5ffd44e43a59ed6524bba507f9457448d9b3a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE2VC1900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc399a488a6d369262f0688c1424a7670a47973f4b427ad7b1caa87580f93fb09. 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/SE2VC1900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdb2142ff4eaab65353f2797d9b59f05624e2d270575d547861a1936e0acf8e. 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/SE2VC1900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce10612695198977d9ea6ba22da5e6c9c931367510e3b19503c98ce75bb07079. 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/SE2VC1900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fdbb9c7afaeda9ef5bbdf199049de0eff14c584b3f8c0177a47bcdd9f563ad. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/SE2VC1900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36268c4649a55a1032edcca6db826fcbb51239d3f5d4063d3a697d926e4f0f. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/SE2VC1900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4975494d67e99c2ec1f8dc954cff90c9aed3383a4afb528fdc4c44df5ba60b. 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/SE2VC1900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7681b69bbc521e38402ef46550c8aa3074ac71af66fb104916425bddd4faacbe. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/SE2VC1900119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86686d2435ff5d98d64be286427a9e11b886773d9e35fe327b48352b8c4ebaf6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE2VC1900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acf12745590a73aa79f9dc8cad9976da9de17f0b185186f516f5fce92b1fceb. 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/SE2VC1800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8477c33f46dad302f0cc56f85c3047ec009e28d6fab42318f5a9a292c297e99b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/SE2VC1800502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3537f255a77e5544c3a347255b82f7711a014a6e671553d56705896ff0d953. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE2VC1800503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bd8e0e8e6de250da40cdb6e5a3d746b716a603c7eb778abc33f14ce432e598. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE2VC1800504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8036feb62f560d9b17424555151519561cd8b4390494b038ced4b49029bad58. 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/SE2VC1800505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dc336a6dc0e289b1d729bb5c1f54936498f3a23d6ae9f3c04b13cbd24b96c4. 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/SE2VC1800506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec07ec0d1cca89887b6a4341abbc67f40e748311b9106946fad3f05d9951ee44. 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/SE2VC1800507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b0a4b6b3d79033aba5bc344169226597bd7f14f1eeab1bc166594683e8bde8. 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/SE2VC1800508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364394a9a51257f7eaa08b70d55870104cae04e97b616825f88a796696565ff0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SE2VC1800509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1c4ddeceec3f0232512d2527fbf5c58ee547943d799f2a403df2cce6ae46e5. 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/SE2VC1800510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324925a35c22fdfd97349eb8e5bd6e597ac1fa396c1856c3eed69e61e99baaed. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SE2VC1800516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe20450d61d18414bbd8c792553a74ee3a895bcf6fa559e7a5d1e5c289087830. 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/SE2VC1800517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf999b7d4b5169531c4edf141452a52b6f40472ce9db34c199cefd414af7908. 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/SE2VC1800519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a28e018862860a06acc98c18a31c59a3db8e1239fb3adc94fa620f65cebd801. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SE2VC1800520.