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 0x61bc53f13c6968f0120277df2427025685c3f21a7b66d1d2aa6d900354b090f2. 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/e0c274a3-d85a-4ec5-8376-91be9a2c0264.json and https://artists.proofprofile.net/proofs/artist/e0c274a3-d85a-4ec5-8376-91be9a2c0264.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 0x4c2b2d13bcab329306f1797f83771c9f349e08c21588ce3c63beedf3e15d751e. 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/SE6XY2208215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5198ad76831b28267a4d00e47314405304ea3305ef0a72e2f2cbbe65dfdf6a24. 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/SE5BU2205776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec6e1b817361d3a3fcfbb04b161150a6c7970ba6a251b1210482a9804d0c72b. 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/SE6HN2299093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cdb30b7844386f626cf7f0b94aafec0b99ddc1046e3538c62360878ad10f62. 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/SE6TI2305690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561d5f54be8277dffe305ec57cb9d0424882c535ebaac3e3cff314dfbe6ffd5a. 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/SE5752304647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1820a8af0ee1d591944ce1a1ad072c8dc6552ad4144eb074e5563bf3ea046274. 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/USL4Q1758194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4181cbfa8179d1d86d73a473603dbf4faa74c7bc20f33be2fc434bc7ce776a. 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/QZNJZ2481079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85efbb51bc8940c636212cb2c7c04491020d59f91951730ce05453962fffe9ad. 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/QZWDE2434983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc407c29d760a53ac95f38468f36b340560a59267a0abdb819848665b6cd1547. 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/QZWDE2400587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc685fa2e7896cdd76e7b42bb45224008fa371a07667aab5d5929389e4bfec9f1. 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/GBWUL2400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84fa7df09402434a15ab8877a5d3cc46a5e910f3e2f751609751e0bf3be670d. 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/SE5BU2356258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f07f735a26523781539e4e8842338e826d744c7ffae830e43a94ab68b9e827. 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/QZHZ62079153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365e1cf95260cacd63b9852970f83db1b897737bea83719d894836dfa0239e81. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGJ2041169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f2be47db31ed9c6fb0db28f61c0537766f3edde513989cd86d3115900922a6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM21933983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cb024e0be17cf2164d1225b5c8ae0481c6af196b27be129ea43db80d9d798a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USCGJ1917004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22aa2271ed01f59c537283d1bed0e474c1525e6281f9bd6c42af8ade70a289. 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/USHM81821941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faef4ea24efaa781d258d3608b9f0304e502fc52e88f246db4a9211ed90e8a7. 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/SE6XY2146121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd548264453e19bbdeb1a9cee747d01682cd2b56feb650b357f26e6d2c2b50760. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SE6XY2146123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63832ae100765a61f61580c7b448f74c53ecc20c80348fa6bdb4b04d1b1d594. 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/SE6XX2123769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0983e486d68149abd7dd41cc2eb8689a7398c86a05ef2c9c05d45bf0b419085d. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/SE6XY2146125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee193737b9243f4fe56f29a4d8abc6e88d96e56cee88c282ee58c28d780ee07c. 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/SE6XY2146127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837b045636437a61f979a2585b9daab1256932ecdcf3e2797b3479f18c0d9728. 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/SE6XW2245450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d8ec834cf78104e1a008282c03e9c9a50e5e0620adee36ea27b677168880ff. 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/QM6N22000878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0c9020204c44bf16a9d5e97146b25e0124d5f6919d9c1b0a2d5abdb6bb4fd2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZNJW2065644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6f5571e4acc13d110c645d79fc137a0890d3b43af65030fb25687d5deae2bb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMFME1957899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43af136d88e02015facb654faa6f8e81d23adeffc17136372334159c02e7d753. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/SE6I32187121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32afa584ac5e9eaa12477fcbd324d1c6f150e46ca3e5041b8f8879869a0592df. 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/QZNJV2003240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70eb1f482a00229698cf7df51364c29a6d15f521973e2fb48b88402b8b37f50c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE6TI2117391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2f165d3825a0f81ef53ed8cc3a8921e4f6de50026ed463df9b8a48bbc1440d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM7281946235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c041e2e43039969125d1aa895a3a7f403de95a9559cac237e552180b51c8fc. 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/GBRKQ2518327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0202e7ffb71d69d53a9ce3d23ba1c0b8d5052b6353b53ba5e476d799ed6ca. 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/USLZJ2545282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a2d239d92c45a91e055d21c0adb1378805567fc7eff7ef8f78a10bc81833ca. 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/QZGLM2506284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d112f2eae72208d9ac7b257d39d6a2b996fac64669ac9d0f1481848fdd2b983. 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/QZGLM2506285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf743047f408c3a70393edcb114e83aa99a44b92c5b08115fc2e91405290d57ca. 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/QZGLM2506286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453372fd3dc7dcd3a60c2310b9a08169fd3a146c6507a5555bbe89b00768f3aa. 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/QZGLM2506287.