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 0xd6d927c8c896417ae5f66fe4a13c15ed625f2b0fabc64e40928456abc37f5ebe. 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/eaa291eb-e350-4c06-894e-512861872494.json and https://artists.proofprofile.net/proofs/artist/eaa291eb-e350-4c06-894e-512861872494.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 0x223b8d8b9e62c90a235a217300293cd2c6439c74f57d78b4b7575ca15f91ae52. 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/CAW112300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eee7cdf39730f9fa0b72513131ab63508ab9847ec175c43ae697100f493b26b. 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/CAW112300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc054f1ce4c68bae06a36c059a4d566238ea71ecc3cb37a1ad9086d150382a10. 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/CAW112300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95841297728fa22a9da473f424706685ad592323bc423c58b1cd600600e2ba4e. 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/CAW112300242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c501212bc405dce53305c3c69a5c143d5920e321f66a79326dc733f68bec64. 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/CAW112300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ef5777e73d5b71e8b49f3de7f49bfa49c6d84186999e483dd85238132dd24b. 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/CAW112300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5b81b61bdb36a7cba14ae8fc33a97d64ab2f9b8d8b54ab97f73ae9961e188. 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/CAW112300244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ffc8b23f61644935d299dbda8b574124ad29556e0d3f543967380968a45eb1. 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/CAW112300245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c074440ccd72aef06864639f7c1e8180c1332fe797477954552456e9206b6cb. 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/CAW112300246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc776a957b159ab9dde688aff1ff69075b5d527e9b9237233f2200f4fd55a13. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZES52215444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21c4deff96d651c015f21a0860202ff128d856986245d84a33b3fb4047468a3. 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/QZES52213906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cb1a86038135504512f0bca49ce0eca3deaedcddc2aaa8f76df81d390e5bae. 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/QZNWX2082202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d94af641d25788e654f6ff6702fd7364777a45cd87a821c1c4e69cb24f3b5. 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/QZES52215445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96041685fd7227588ee76c98db4bd775c76909a0f559c399183dcbc056cbb117. 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/QZES52215446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e72a81dccdffa09a0ac7375beff38b76b5461bc0250c65b5974c61cf8935b8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZES52215447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94680b3427bbcc11d8d41fb80e492e03f8de73c6acc6240de151f7012056854. 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/QZES52215448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f8cb42cea3ac202884404c1af3bf5a43c0101c699c5730a75cfe6fb1eb2489. 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/QZES52215450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cb95b6c352aff750ad523748bd488ab34a38aa8954adf6d50372a4a3d295a1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USLD91763822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26184f00003f10dd0f94738274f45214333b915609e97a29c7e510d036f12df7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLD91766738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee4118a7c5e516f2a002528249829e18c0aafcdf691954a319979db83d7db54. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/USLD91766739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cb95b6c352aff750ad523748bd488ab34a38aa8954adf6d50372a4a3d295a1. 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/USLD91763822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ea8b9d1271779d0d7357dc0ab32dc5290406a2d5588fa173a2d9a8da5abb20. 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/USUYG1507890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aac0dc7ee61bf54cebcabf7e959cbc67630a81ebdd0096c4f604cea8a7e1b9. 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/USUYG1496110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ea15bdaab557fc7b5f45ff40749c5de9b69971c198322dfd9c2a6f170e77b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLD91741419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67ac598e7a62892314946099fd62cf487d6130f3bfd8e7c43d79b354b69fb68. 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/UKXN22204311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21c4deff96d651c015f21a0860202ff128d856986245d84a33b3fb4047468a3. 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/QZES52213906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa391e439b1977daa6e09c26b6111944d0138111e9d5ca2cd91ec6976ecf2c1c7. 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/QZK6H2155716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fc58eda9a23795388c0152033a174b80f05c660ff0268bafe3fbc2155d19b0. 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/QZES62193010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5650fc86f86503a4a2027c28b065d98e7f5753217881ec5f0d567ba81e6647d8. 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/QZHN72057342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12faa45ce9c7ff5e3acb7ec0bbb4c3dd9166d2ebacf7945b86350f320971f5e0. 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/QZFZ72013833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f831be07451f785141741352dce28cd7713ee5c5aab899357131690b990da7a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBMA22436972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddcfd971570f1907e817d2b11b446666d284c43295b66232e4752a3ce9a9364. 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/GBMA22436974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc86511d0b4f7f096d549e45cf7808000e80e93ada968dc96f25d27dad193025. 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/GBMA22436971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f169d0f44c00d0c30fbb51c69bc6549d593f68ebb689cabade7ae655bf771c8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBMA22436975.