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 0x3c6ff621e5257aed62942a6f4e92509c8edfb7be8633d1cb94757a4fbe778212. 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/3e0981df-66e7-46dc-874d-1b7bdee5728e.json and https://artists.proofprofile.net/proofs/artist/3e0981df-66e7-46dc-874d-1b7bdee5728e.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 0xfef5378e9f0c36d31ae6029042f14b597abf98315a900d73de348a207590b6fa. 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/SE6XX2357717.
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 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 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 0xe1a43dab9bc8e396f0b7b2b7d354db86dd57bd1dcec649f09f807c9d04d226ac. 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/SE5752309280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4c6f89c2a58cc3d06635f4a0f9083382f36f7410693053a11cf431e3b9240c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZ5FN2471921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63832ae100765a61f61580c7b448f74c53ecc20c80348fa6bdb4b04d1b1d594. 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/SE6XX2123769.