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 0xe0be8a6154f863da851e30483bad4cc721fed9b4861d33331d4aff1aed221043. 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/1a3924e9-9404-41e6-8905-8812779e84ed.json and https://artists.proofprofile.net/proofs/artist/1a3924e9-9404-41e6-8905-8812779e84ed.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 0x8477e40950abd2362f425f73cfef7e3bbace0ed71ce2001cea672645e163025c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4771500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f76d2c8fd77ad66a87546e9f4f102a82c4654a4d1f92d7f7442c4d7defe767. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM4771500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7c0d7df226965c571b5a431ea4bbd93f2b0e87e17f6d5f470d288abbfef946. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4771500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8582c20188c0e1b2b10933dd91546f1ad6019f1b7a5e31cfcdb1685a3e66e8f7. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:58:23Z), 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/USPE09000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d20608ae8a212346bde92cc0d0fdc697a8de3b8c805ae29a812017f7ce0f25. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USPE09000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3071b7201f2607d99d861190744325da6b32b5e9ff16be0ef3bb3a57201bb3. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USPE09000182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ca4fe3f80830aa579b47ea3575b643b83335aa054aa03b2f0ea05ee65d38d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USPE09000184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96dd4ee1013ca18ace38ca0f2bb1cb74a6c61c88b18599976a11e4fa7cb91f6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:07:08Z), 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/USPE09000186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b71cc501bad6a44ddf95c34250cd36adfb10b71ff0843f1ff4335c66e6c616a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USPE09000194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de950b3430017cf12cfc4aca17c375ebd83d09e5c44a980962200904c779278. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/USPEK0900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6c64040d98930d47a231ecec915e799429a526ea53690eaa5e4a2896f944fe. 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/USPEK0900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f19479f7eaaa61ac75ed2f723804f57d0d7384df7490641ca56f0a2df52cb4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USPEK0900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449cddd101783a2588008cd6e679d5d8a319250e75c867729f5550dc93b89a2a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USPEK9000171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77284302405240cfeafcb2c7372e4971b3c78fa5e737e501c56db954f90e191. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USPEK9000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff8ebd91e0123c55c489ce53f73e22d2b16f337e646cf75ce3216a91f78ae1d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USPE09000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8068d9dfbead154d89d48673376ffead48e0d0f30fbe600161544caf28a3f7c0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USPE09000199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b27e261f08603a602fb8ce336c91089082462e55135c92bf0f1e28993204b33. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:38Z), 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/USPE09000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7d0e63ed1bcc392eec7a605da8acd272446c3e60de018a6b0d0cf2344f9bb8. 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/USPE09000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0880eecd2a1d9c54ed9c1adb11d2a890a94e5b710d48288cb1866393d0f8bdf3. 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/USPE09000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e4afa28bfdf968ab829dbef0855e8c948d5e5373ebf3dab58608bdecb3a453. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USPE09000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d17d6d955fcbed8e6f83e2ddecaa9c94fc065980599b0bdcbfba26ff2b5330a. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USPE09000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a974d3274dc5ebbe3fff035a99bd4f0411036e2bf0c622b7081945fbdc0c0. 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/USPE09000588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a207222812d53c5ddc6a79a22310d77f224ae9d77b2309e73954170046d9b76. 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/USPE09000582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1074a8b86eb9757cf2b11075fe08a14f8b45018b2a7b739f6f91b9224ab59971. 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/USPE09000583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65087d87c462b1b8c4d18f8c66ad6ab58b5d7922959a52343cbb65b8e03165fa. 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/USPE09000586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891dd11305c7b6e059256e72b3c0cac2b6397017bf03bc2aeefa9c28e3db1b10. 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/USPE09000593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76840163a073e23884ebd6f2f1216c4fc799ac2bd0c149a9690fa6e6af6080f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R1644785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe432c57e0c7dfcd35e6ee6139afb30499963f7329cd013dbdcf85c05b5fc05bc. 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/FR59R1644786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fdc1a1756847ac0eb234b65642a9276215a1d942fc8ff0b84778933adeae80. 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/USASN1101109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b9c97eb0cf22d6b514f6cca817ecdc6385b0cc7a86c0e693143a28b49fa806. 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/USPE09000454.