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 0x80bf798f8aeaa0a181f503eac13605cf1d48b996666b41cf8a6f871515beffd3. 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/e26f6e82-27e8-4762-bc4d-a89be3ac87d8.json and https://artists.proofprofile.net/proofs/artist/e26f6e82-27e8-4762-bc4d-a89be3ac87d8.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 0x0e053923fa0b9caa532d2813eb6d937c88158845a476cc75b2abe0ec43c88ffd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWY2137710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fd2775c3dc61a8b126b039dcfc58c52676e48a2be5b634057f4e765c554f41. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNWY2137711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a69c7a621b72afcc87d7545bb140edcfc42fa7b8ccefde4c1e74136d9f82e0e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZNWY2137712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cec4adb0e9bd65668c119adcf1eecf775efd50c4db35e698e4de63522720f94. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNWY2137714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a01dc0f492c1b78358a65f614b6f9e49625cad92cc567783861b063b738894. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWY2137715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5d3c931c55306af12e039dda0de9f03840d172d8167d87e605e5c0640f9145. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWY2137716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8682e8bf16897f0f967e6e99c738fdc190f2412e1609f2049c8aa173169bb325. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6L2230941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c114fe2a6472e61cc5b7d8f50712ca623aa14143b79ab0c6ea48fa45c4067. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6L2230942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bba753db70834ff2cbefb89fae90d5b5ab3649ec45993ba1dae2c3f53b6384. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6L2230943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5d879a47ecd50da894fc7ef427f765252d60b3dbca583baf1f912fb66db623. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZK6L2230945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03396247b14b623f886046f34db5429050fbf1c75c162b3efa5b6d3a990f5549. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZK6L2230948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370d63c09bd9f239f3b6026a8cf9b982609e0e6d3d06440530a63ea12cd789e9. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZK6L2230949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15732f3a953d44caeb8eb151976dfdc69cb11021a931417710b86a880af96fb6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ22300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aef94b3b293510a5b9415f88c400a011861ebdd88088c9a401793a455c01695. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ22300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eba508fc0e5e8641dfe762b41474d326db6d68bd768f7dfa3b67d67d0a6cfa. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ22300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4242e560e0305d1e7b3f47bd44d841fedb8a03784dc5aa62b09a654dcbd033bd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFZ22300146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab58b3fd7cd3b88579d4504a783243e199a42c7f2244a726e346ef030452639. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ22300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5bc9a54ff2caf6e01836d3f26656b212522c9a951784aef3f203790464868a. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ22300148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca18e52434598c671d3ad57126897a5895bb6865fa7a1b0f216e1b18400a95c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN52466759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb44855fcd27865f1acdac64fae24d70838bb37ace0b0601f241bbbf43011ec4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZHN52466760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6932d4db88c03e61ca7388e3353b3c2b79400a9840a3930384a6d86cf26f2cf9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZHN52466761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e2bd20b318615d314f8230882d0f6489c9d2444242b9389126bff19b5cb219. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN52466762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f2aa3d3a74d3c3ec60e08f9dbebf4d9a95cb2b44e04332d91e69bff3e77b24. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN52466763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbe1b9102041a8a5ad9a4db8098fb6c02bc9feb7e96d023d58995d1a98b4e7a. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHN52466765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17627a065c40260ccbb856a91aa6fe5466c77c66fb5077fce67fe9efa2ad93b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZTB92447984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cf61a57d798ef44cef94f12e1acd874468bd97d8a64d0990d3d5526c22e5e2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB92447985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e1e7e739fc08957a6bbb7a50d4590492c0b07b511bb7ccd75116db4635e802. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB92447986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f913ef6ba01f49cee3429841d0e2d8d960f9544002543e047841e16eb6c8d9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTB92447988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2df8dd745889fcc6a7660ecc2845fe78e55e14de1f345c297cd978f02f8216. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTB92447990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ac80db898f39edd17cd1a05862573fbe7f7ca8f10fb213aa1f523789c70834. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZTB92447991.