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 0x1766e3b37b10b3309c992cc6715e544d1d3d542d949d14d02aa69b9a2c5e5273. 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/e923b591-ffae-48a5-acf0-f8b195a7d094.json and https://artists.proofprofile.net/proofs/artist/e923b591-ffae-48a5-acf0-f8b195a7d094.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 0x2c98d070150aab70f6cc0ff142a6472848297c4a674c707402b5cecd587016a3. 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/GBSMU3169766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dc9f6e4bf85a7c6378fb55192b9e23bd5c5e97dcec3501a41575ece8dda016. 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/GBSMU3169767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f9ddf46615e75c6e66b54d9a7639cd3041536c6c3744e357ca8f187296ffe8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBSMU3169772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0244c7944a1096710d785c6661c1239bb2a97ca54b2d3c22a8e979f1f0299ad4. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/GBSMU3169773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413df312ddadfcf21367916c6bee955af8b3dcb923b67f98704202c4b8bfb8b4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU3169775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e680975bce7ac506326a5af23376bd76d0e4a58198c072d662ec2ca6d8fc8ba. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBSMU3169794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf09fbae596fd04e558558ab0b0275ccfbf92e78886611cb6002a6ae614c3ba9. 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/GBSMU3142752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfeec42eb5e1ee900becf663a6fcf6f64a59c28961faf9fac88f2d4ba902923. 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/GBSMU3142783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0221119104c248180e245422ae7573a28efcb3313db49cb3b75c1adc5837c31. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GBSMU3142788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ea7ea8b85d408280c64ca40785841f809cdd76b328ae30490f736cd09eedbe. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBSMU6427118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d538a052414aa657d16af11f90af0dfc248ec37b515441f79641d52e0306fca. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBSMU6427122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca3bfabe2905f51741d5f9944a234abb92a857924efb41844465df6c9189286. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBSMU6427127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd8119546f6d7dff4ba7de4fbf3f72812c387541a9ddfe947593054c32fc72e. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/GBSMU6427101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb56b840f6ef900300084b37320b6087daf9fa80cf43e99b67bba6470d32d83. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBSMU7054627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1ecca70b999871271a9ae3e1aed4ec8947a17e61fb97b60179e7dbe0e37d22. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU7054637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300315761f7ff3609d0bba4663b3f6ab36e3f3238dcb6849accc6a348c82ba82. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBSMU7054578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae38b4dd8041d47fabc11df9c19c3c756f6fb9c90267fc6790f140cb9e8b95a5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBSMU7054485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ac09b033b6c8044f26b58a05e71607be992853a42d9c01bda0c32302daf3d3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBSMU7054486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8b3fbf3eadbbf857ad8da27e2be568a354b562419ccf937e9b7e0b3d03269d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBSMU7054490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a707fb4757c72ee096f57f1f2574a199ede15ae2fa5630235d2d07bc2224e2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBSMU7054748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fe37cbc89ed483399a42f0882e363f8b87896a13448964e05d1f991fb4aaa9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBSMU9049938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0524cc4be26c3fdaa60501b72247ca027f9f9807d8d71a8f80c7e00c83277ffa. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBSMU9049952.
Heb je mijn kuiten al eens gezien? (muzikaal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41174d5e803f8b6768c576173ad787455774030d2b24491a467e5513b301d493. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBSMU9049971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e13a66fb7cb35ff4ec0405aff5904920f0234b1de02a304c3b61a1bed6ff25. 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/GBSMU9049973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1058e47483027fbe16721edb088a4c5123f26cea447c7b25f1e4dfa1d2c0eb. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBSMU9050020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba95f7fb2748d707fe8cf79c57ba7ae49e99fd0e926a1e1ef96934e24bb7e6a. 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/GBSMU9050023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221ae02a80087c7a1cd4b622275a0ff04002f46c9799bc9c35d0c5b6f2a8a59a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GX3HH2205246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15ad6d9968c850937af951400465594839e336e4311b28e5cf734b8ed097808. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GX8LE2353834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5151716d2bce1dbd83e081aba243010ffc20e963260821264de6f988e545b8ce. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX3HH2343952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975ab51660e27ecf332402621cef3a432fad3f42517853ebbec5fa4d104f2792. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GXBDT2365743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1734178813d0375ddf703ad84a361f63ff4d9535a9f9b2ab2006e0039ce8bbd. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GXBDT2306875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd665873c13c114ced22dd6763a38078d9d1cca726ae606e3ec673962957b01. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXBDT2346437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2d57bdd1069f958c22d4904b4737fde897db37a1b1de2d9c01de3104825ed2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GXF972411079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf9401eb113eb910a81b6122617bd85b86142377f07fc623c966a046307e85e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GXF972430007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51538747fa7e5a08f3ce11724822a1c9cd95070b187a9ed5268035aa619e3dd3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXF972436514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0096057b89497b6ba4e584fb255a8c1127746792422fbcfb4c5a097b870da30f. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/GXF972468552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2652393b6c807e87f9fe220769029c13006112a6079adaf68ee60d7047aa5f4. 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/GXF972459449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e208b83b2253f4ad1c41b5a3161496e95332b5e2ecc72ce5d4b1cedd09c1ef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXF972466809.