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 0xa072454afd76b4f43b818d5013e41cfdf127cd4a0c9023713e17e41bdab6b313. 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/3cc7741b-a7a9-460c-bd16-18da00b08c51.json and https://artists.proofprofile.net/proofs/artist/3cc7741b-a7a9-460c-bd16-18da00b08c51.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 0xfd4dbe8d6fa640dacedbb3ca42620a423e264dbbbcecf2c3dd316b5db4300ea3. 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/SE6I32401617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c46eabce98afa49c6e3afc26595df5f1113bcdf05dfa5b4851a6f0b48defc7. 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/SE6I32401618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c47562474fbf95d734f0a161c936af7b1b95d96e0edef553d573840f041e00. 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/SE6I32401619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffe99d34b884116f653dad8ff52b9f22ce3db2ec37982179ddf05f352ba66ab. 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/SE6I32401620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09ac6ecf9fe9317ce781b6b5ec126b3fa09585434b746f3bb42a20652ac0485. 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/SE6I32401621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f6225a9e2d9fa7ac90e9e1d2f3dd46c6ba55f919a766494590119843b1749e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6I32401622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c0cc236b7f39171c03fd3448969d9d46e8c478149c678a0795edfe494e080a. 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/SE6I32401623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c2a22fbf135f8515507d68ffe681101d4d800cef678cc4e45ffdd078e9a633. 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/SE6I32401624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd53537f5859a0d2892be1d1d44704852d0b91d11eab021a0a72efabee5addb0. 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/SE6SA2360105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfadc247f32dd689d28ea9cc79893ceacdca53d52f71d70895ea948306635bc. 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/SE6XW2394669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8dc979eabf0fbbb1d6ebbacffaf88274ebcd4d54693d10b4480c3ee8f8fa87. 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/SE6TI2320385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa646a2156e3192de3e4562c3cf67fb2d25dd08d2588b242166e1ce8fb5328c97. 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/SE6TI2357462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b89c04a1a0ddc4196a85c74401c8f86b9ae1e8589347d240713d28340b2e30f. 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/SE6SA2361508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8d603077135c1f8e7ab859f30fc5354334b6c24852a549a2e0f202fc6f932a. 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/SE6XY2317529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90671153e881d0f3f945beb5678fae0e4e36653acd3739508d1fae335e7b28f6. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SE6XW2365322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8c99839e71b621960643d98ac6d42c5f610d24b0fa17f58ec29d75ba72333b. 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/SE6QE2344564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1943f9ac66f53a4a2809d8f417250614ecd3b1db63fda9586fb76031a4e02b80. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6QE2344565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb963ef5107532350408fd69f3462b5fcfd06003a1196c572c0be0fc87c676066. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE6QE2344566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6b61b473bbbf689d2e52b29c1950a1513198f3f5b91745beb2b1d34351d406. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE6QE2344567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f3be5d37532d72b5bf4a72218b35339380a8ba7c1533eb6a78dc08c202f38c. 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/SE6QE2344568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739296373d3f23c149ee0f7ef3c11d8bcd58374f3c2732d34f332c5426154a39. 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/SE6QE2344569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d2f8417fdc1fa50ef073e8f06a5f15b17666e69345a9c1bb579416e52fc776. 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/SE6QE2344570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495a328c4db13a0b4fd9dcbce1dc14240eebbfee8bc8016954f35732f764fb87. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE6QE2344571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88a3c87139637e172accbf46f3dd67c039bbe8b1a76d2b182e802d0d073c7fc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE6QE2344572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354ce19c4b8a1b8dbea12b3ac0b1b0249e24e37544ed8deaa48d072ac882967f. 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/SE6QE2344573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b679c172fb72f597c1ea294c8399cdfdb7d1dd4bc84e50c221dbf493879a3f1. 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/SE5BU2494964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff6198671426e52a44c8f33c7fc622e23f694073700d7c45016cc0306cc9344. 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/SE6I32492130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f1191ae7ad0e96ccd90a428025e4adf5fc0a3e13d1cc43b976af5829920e05. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/SE6I32486505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed52e99bddbbcea16d1c367b03b0f5e3edb0dda79d19ac5afcff24999688927. 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/SE6QE2382255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b89c04a1a0ddc4196a85c74401c8f86b9ae1e8589347d240713d28340b2e30f. 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/SE6SA2361508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a446ca34cbadd4d5742155f21781ef66143029502904ac291c7c8e1be876cce. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/SE6XW2344092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e2d860123d76e643aa6a63ca3a7710ee6940742ef02b581c130d47dfa90e03. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZTB72499006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b34484050535fb1fb32cdeb1758675a3a8371454527bb0ce24bfadce7959905. 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/QZTB72499008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f79aa9d3226f893d6fabe8dd48cecfb929771ee466e6fc4d9e41d759861ef2. 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/QZTB72499012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1945971a06642221221de210cc6e8c1905bd6374ea86e00ef4df011d859d71. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZTB72499018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe306a8c62981ba8f7eafa85c5850c701aa78119939e3c7fdb0ec203560bd1cb5. 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/QZTB72499020.