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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c70298b869a9150b21467971f25d90e31103a28da0e963a5abd05e6c3e0c82f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99f807d5-02f0-4363-a135-f32b37e48db4.json and https://artists.proofprofile.net/proofs/artist/99f807d5-02f0-4363-a135-f32b37e48db4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e858e527136d30f0543ec5738dafcf8eaa7e33b3279be1f60504bfb4771e69. 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/HKC992924209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39c3f7ee6ac5242b5a72babe36eab649342cf897eb89961e8bc50038dd1d8c5. 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/HKG732519553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a7c30f0d0ccb27211df6e8d8af9e0efdb5d6c19225882ce54a6c6b561fc3e. 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/HKG732519554.
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 0x6d5b364e15d031a5ea36cd60a02d43238e79904b4a43e66d3edf61448a11d76e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0M2428798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f8bb26698a5f263d41e135734fd9cbda157c8cf89b6fd947817dcb13d9ed6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DGA0M2428799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce959dba414069d09b50c4d2699f338dae1b86be5efda20a6a5679c8983d3bfc. 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/DGA0H2486201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0604db08d7cbcacbd2290fd49b35df6fe5c645798720d79628722af794de9284. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DGA0H2486202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e90142e296b796d9f986f73482151fb54eb31f7f6c19e492003247ab5bd236. 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/DGA0H2430987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcab7a286cdcf77f4e1d99f508ec855e6751e78531454209ac0eb613ed99e153. 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/DGA092492990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10d7d75760d23123f8ec9127309e2ef4822779b8d5a8bb9636813ed1776535a. 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/DGA092492991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66e6aa6359696a87bf34b8569255cbeb8fa3d5aebf57c8b7700e83407212643. 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/DGA0M2340330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86093358458b5383a68c101c78ce89da8a2163447af31b7aa3af97d77dd9d81. 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/DGA0M2340331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f42f6b216d5d8be8fb52ef4decf220772ae504225631e7696b22ee4ae0ae88. 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/DGA092351601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21229851ee48031d5c61e420bf3998504d1b9fe93b51995e2862c0ecc9a2e082. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DGA092351602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a796131c80d461e7cb4d8b0237ada4f959d27018d1493523db96cc2efff565a. 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/HKG732370293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cf5528299999bbd56dc42506ba31debddaba6a8ef1e3818726ed3a11980532. 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/HKD012376710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedb86320de7bf347bb0cbfeaa0af45fdee2816cb03511513f2914fde594933c. 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/HKC992324394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbaeb567b32580f3f9cfe84317f6d6a983ee7adce924c2fed8d5b642b8730e2. 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/FRX282361462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840aafa5eb1c77647d25161ed6d7f91b094082b196d87d34a66f54793d157565. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRX282361463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec10f050aa7952dd04b1644d442b6b92100077d685deb63c4365e3a296cca82b. 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/CNZ782300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9e63e094c26c653061277c4f0fb582ec0729cb644eef17cdfdf2cb0194c052. 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/HKG732298164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d08d1da04208da53997169cb3e8bf8464025d12fac04451d2ad33c6b000ff35. 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/HKG732293386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04774a4a738e81c452f85749139169d735ccb422f0bad13def4bb760674e8592. 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/TWDL72205321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e55ff609068d990b7ce39a593b122fb737fba8db572ba7a64861dd38adab904. 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/HKG732267667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26180770faf3f26627f494964b89beb4b3f9e192cd7b31bc0fae0935baecc61c. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/HKG732267668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53518c28b7e333e09834f5a85e2c1cce57240a91d8ed856f1b5fe723aaa763e. 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/HKG732311588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b45f0db2c1e41d6fa8473d84bf0b77c9c3c7b4f42c4c7e0e1728f58d4b4ba9c. 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/HKG732315383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd127385cec51f864dfd3021cfd79ef123720a9a65128b1fd04a91b515c6d6af0. 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/HKG732228533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54321d82cf78c96a43071b0361621edc09191c251cc7d702065bb67f440c001a. 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/HKG732315067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3d67d3bb60f1df49d60e97f1d70251f62daa116078f4f8d7a6a7a490a31d10. 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/HKG731753199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1025201988037217d26204d36cff038e1207d8029f9f5a487572e80ddb7b585. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731726432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f879b1a2b07d19addda0645411795d988c171aeb68032dfa427452eef2d7be. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKG731726433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a87f40fafd57ac00d746db79cc598e7d833919a052f8ce0ad5c18b5166fbb3. 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/HKG731858072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1f81eeb5de8ac2c8205c95b99a02eb0460db0bd3667e0a4d412af0d24d93af. 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/HKG732328349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd803204a08304cdc16ea165df492a56b646f9e39fd8d4a6a0d6e066a7e6d9b71. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HKG732154525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208f15c0f620b77b2ee78e9deea657e856fe343cab90dcf58237c6399b29049. 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/HKG732002003.