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 0x7d7e779cc4db678f4a1b2cb3512ab2002a857aa523c9bbf9aa0e68d98aac2251. 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/dd245433-a4c5-4552-8c13-0748602fb22e.json and https://artists.proofprofile.net/proofs/artist/dd245433-a4c5-4552-8c13-0748602fb22e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x3eb8ff415b74c0071c5a592df969dbdea7e8ad8f6e1563f5c54598d1df0e83fd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZGLS2304041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2257a8c518812abf85ad02bdab25d3ef96008fb3162cf4762ccbff884bee99e6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZEC2301883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a344abfe3a24c9277818d3454ffe4d4ee8e1567b712920eb58a97d73a9a964. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BKP9L2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa568026ba362f2c7ed9d2f4bebd65131c1fce99d5a5ff6608de67913b9a3aaeb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BKP9L2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1be2cf982f45bb612dd2348912fcafde269c719cb7812abdb72b3ad810031e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/BKP9L2400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce1b634e8fdd615a757a3bee68c1b16d84361735f34a2468cab597288bbb649. 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/BX4IU2501814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d842242c6db8e16361980e18c32a9175ad4ec4886b38c58fba9e1b02254b6. 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/BX4IU2501815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0dff3ea1e1eae5d8736313dfd69aac2121df7729ae1a357cb4a1245f7cd253. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BX4IU2501816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21a04e8d78d491b0f574c6622b6c293875097f2777cc40d887627c52ecd9523. 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/BX4IU2501817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef05a761e0b2f607db714167177ed2e967f7a1ccee617990eb9716126789ecc4. 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/BX4IU2501818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdd51fb94bf392019413a82141a0f54bd9648bd9bac627e9b7eee754afc7357. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BX4IU2501819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f890e391786a4554501d55b3cbd57acc9f0f32c97b0126191bf8a390fb75fe. 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/BX4IU2501820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d48eb42af55658bcda2b1413f2d5abdff41b0d5e67551d1d4303fc9c7d1c02. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BX4IU2501821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7e064966ca508d49198ed7f038f0fb06f5625f682c5a0b1a3af7d71e614c3b. 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/BX4IU2501822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c89853d96c94669a9ba0fed47c7c9e4bafa915b6627d2a93d321ab8bb873a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZWDE2373643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fb07d5183725fa606531eef340fae1ca1d072edfe3db6f932f6ea603e2e560. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USLZJ2421918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f1720df845f471d6ff0906060d7498f0a63cc2212a3a9e28075c76fb2565c2. 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/QZZEB2422160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebfc2c418755de3ea5eaff80e2395f05b8eeb2202d71d5e4f227d0a801a2c36. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZGLM2569558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfc0e95c30efcff3379f55f700aa6933f8c0afe424f8d339e4293d6d2d0e8e2. 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/QZWDD2392330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82c0e26e2fc53ffdffa23d4097584be18901b6ea493cc606cd691e39107054b. 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/BKP9L2400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d690041451421ddef334feef031d3ddc04cd42b2b798b428976506cf6b76ab. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZZ8A2437383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde95029be926fa95781a2bce82a23099e98362a7e1a15c590d8930e16ff4f3e5. 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/QZGLM2329112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb40435f5969098500241d15ccfbac61de06a0c8a97620920781f479ee02e13. 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/BKP9L2400124.