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 0x47cddba5f2e4ad0b8662608681e7fb1c491eddc1bf0ba4e0eb35654b76b3b136. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a75c4da-f0b3-47cd-b50e-c588caa2311c.json and https://artists.proofprofile.net/proofs/artist/6a75c4da-f0b3-47cd-b50e-c588caa2311c.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 0x7678d6a6302306f772446259466feaa3a222e9505ca5cd9e3290ae0a97d42e64. 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/GBWUL2343817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84660089cd910ef5e44ccfbe3675ef7dc6cb50b3571ab270f56dc9c09fd1472. 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/GBWUL2343897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539f23454697996d6d4a035c82e00621362f15cedea1ae23512a7b60f0a53be3. 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/GBWUL2343899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93f1d0ba744630b70319265d1a3982e4f4d36458f7c2fec4cddeefc8e15543c. 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/GBWUL2343900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2293921d630ef372c7b85e9ce05a545e594608393fd5ee397dd146d57b49279. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBWUL2343901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48487845380a44aacc0ce1099599c6d7f3d321fb25d5c48f1c2376d33d50dec1. 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/GBWUL2343902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324407b6ace71f599683c36dd7bd387831da5476c03f4b0eb6b806735941904d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBWUL2343904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f112913ccc4e5a75c6cd444404e1de92546cb2e4a90f111e020216d2b0b9ad1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBWUL2343908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebdf4ed4ce9a26a8dfa94cc957a5a0a0805c7b79fe195c3df6e183539523ebd. 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/GBWUL2343913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a30ea4e2b97dcdab1bfefedc8f07133e1cf95bf6012505dc03ada21b0b50a6c. 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/GBWUL2343914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8517c50b5bd91e2b5491820c7f3183bd8116855b70898a70516eb0033618e0d8. 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/GBWUL2343915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c972d8f17ec2f90e78d86fd2145097fff97648355157449548948d87c2a6c8. 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/GBWUL2343918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559ce28b22e50eca1ca192f3b10e1c0668ca12009f43d25b49078fa72d5513b2. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBWUL2343919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfe76ed821a1d41c44215853614449b39dce5c04bc3f15b95600aad5e8076d. 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/FRX282114395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aef3db7a17b32ea6537bfb6df7ae97c0e245463723bc81f60fa2fec1867fb6. 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/FRX282114396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c66d5876e6ce29f741f40240ccb6d9ad59eae454372a7146b9bb35c57d32ae9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX282114397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4a9d44e67a78ae8305731dad6c66e20f82983a7a9fd70de255393a61dfae49. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX282114398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf94f0c2763f2e587530853fd7ef1a55e643d7972ade15595b6a6439ac68743b. 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/FRX282114399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa395a6a38cd6342969630888b9a5a05154e42ce6aa52af03bc084c0d452b945. 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/FRX282114400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebda43c7f156378c4a03cb4dcb51fab1b36d019ecbcf28f73453dac36829a4e. 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/FRX282114401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cce4eab946444b9c5bb350b02720ab7e77cf5ae780bff0db6a90a700fbb546b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FRX282114402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17975bf0fe3067e4171153359933c975bb2168bca7e3a47b87cc68dcc6fbfcef. 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/FRZ131804010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2569e7b9f4b92b8cc3ad71d0fcdec11e7391ad2847cfcefa7415b73c4780a. 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/FRZ131804020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f12f7fc767d16679372fd21f56fabf991a32902cde7b836dac1812491fcb9c. 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/FRZ131804030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75186531ae970fffb18246dfa22e248098aeda6093be2e20069368da09f82a80. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ131804040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43615512e649aad62d3fb9df4dd09d59bb98febac42ddfcfc50e491ab8913f5a. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/FRZ131804050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cb81cf0f72c47bbf4ca5c03aab080bfad6c804ecf261aa63c1dd872259662a. 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/FRZ131804060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf110ddb35e0cb41bc92165bf9fc854c4f82ee6d389319d3d6babdc63a56e087. 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/FRZ131804070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf42cc5aaa63e7900796c414da5815dcc190b3a3ab21886a761a7afd78f98e53. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ131804080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c6bfc59fb592e8c356ab4828f55ff47c5ab02a152e35d7d9225d0f2e0859e1. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRZ131804110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7678d6a6302306f772446259466feaa3a222e9505ca5cd9e3290ae0a97d42e64. 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/GBWUL2343817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a6d482f7102635e9a792579063bace6d364ba9be77fa042cf293d73fb18fe4. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZK6P1980175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76565e491721e26c649ee8f806b26f2753528c100c97cab4ba0b662e0f414c0b. 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/QZK6P1980176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a20cf325cab7b595f80a92d67dcfb951e2c6b4fa4c7038028c02cff9887b123. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZK6P1980177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee20a986692613171bb83af968e261e2a48dca63789b869ae63b7f6cec4b7c1f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZK6P1980178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cad203ce7262a3271c15ceef2faad2bce54a2fe417919c88f17ba839eb21fc. 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/QZK6P1980179.