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 0x77cee555a6fc432725639f25a99a241f80ab3fe0ff0812507743f2977d1babd6. 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/b15012f0-7e93-4009-acbb-27a1ba9966f0.json and https://artists.proofprofile.net/proofs/artist/b15012f0-7e93-4009-acbb-27a1ba9966f0.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 0xa21162ff850b17065b36775aadf69c9a75f0ed65ff1be3920aea75ad97fcdb13. 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/QZFZ61992434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6adff7e8b8e5bf7f57b56da9421e06a2eeb26d5a044d039b54c3c3c4cae9c3. 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/QZFZ61992436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c22fbbcadb312058e8d0d357e8806ae03b40cdc5fb74fb80fdedb8b7f1346f. 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/QZFZ61992438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1c68e54782115e654ef9a9d36d1a003a7618165c5483ee205d330e3f16dd6f. 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/QZFZ61992439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14e52ce9fea460cea319d63cabfc9c97d7427ec59e54d38b69554e83fb331c5. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZFZ61992440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe69b937fc89a6b3c896be69c2103697019710e1a27f3d4fa56264c1ef5b1770. 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/QZFZ61992444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd92a83709a3555908be12ddb8617856eaa8be9d5c21192538dc311dbe7aeaa. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZFZ61992445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3b2a1fd194b653da570e2f57ff07bf8236bfba324615546f3af9c712c7dddf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ61992447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccfe3eed3c62cd8c84046e06796ac8022c5271cd0e9a413b12b189806b8b8b4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CA4H11113075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0345d99d6442f7916795b7c517841904075da2a73bfb782624cf15a0fc62f18c. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CA4H11113076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb992760aecb8b97f8680f60813be8d1cc64025344a7e470d7c031f0dd3b28638. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/CA4H11113079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc05db0917a45345bbcb7d118c5c0d9ddfe6f666c503a4522e1bee6754d5598b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/CA4H11113080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771fafa19eef089983d35723911836116c93bb744627e05ec60ddc8a4cc829e6. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/CA4H11113081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ba01ffd1f5dd75314cc56d712be3136466b89067325fde8bbdcb1327d2d912. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CA4H11113084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe88fe3d474075e6540ac89e644b60dcc87dda4d4466956571c5349243bdb3d0. 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/CA4H11113200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656c624499ba2596c0e71de4ce36a04b3d48a66c6d02d6c1281650eea3046c1c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/CA4H11113719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2348bda63e3818ec1374f162bda629f27ed70a317d0edcb963623bd6f82e8168. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA4H11113828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5433926bc4458af05d69a3b4fd7476f9dd5d6498ca4eb9ab6ceb4aa3a8e3d5f7. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CA4H11113829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10970c5f21cf9ffa456584349291808c6ea8c3a059ca8ad4732618090aec677a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CA4H11113830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9485b35e383cbcff65635e1558859d22090e643b8358d65fceade4b41d0fa851. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/CA4H11113831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5d5801846e42462ad17b02d4387968f76dc5211c3cd0b14dd00de1d163da50. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CA4H11113832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b23509d8e4b503f2175c802f71cc63cab820602cbd6b7ed032edbb309aa25cb. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/CA4H11113833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a4cbba9e9a6aaed07f8aff423203c24bce3aec8132f4bb8b7a614fc15f6ce2. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/CA4H11113834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c48ca659ad279cffb46d380d464b3e626d11cb22eaf1941039d51695313076. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CA4H11113836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2a98c9cf28bea869569f47c101da594fe213e874517e67cd3221ca629bc9e2. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/CA4H11113841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f0a8b4404b1d2877c611a1c3f9f620c14eaaa19c2bfe3651884c8a74f21009. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CA4H11113845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a2333a4546339b36ce6a1020b4be5e9060f23a49a9f0b64844cb110840f6a5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA4H11113847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa585be6846f22df1e00ad022658b2d2a03569db9fb2d39e48300d4fdfa0c5128. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHNA1945701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6969f329fec9be6d268836c08c9847e9d585d3ca1513447b34c5390f7c0f432a. 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/QZHNC2184550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956297d9fa652cef0135732af057a00e91e0e5f8fee5ada7410b4d465fbde331. 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/QZHN62259555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5358b5afd6d1e34dbefa432980fd2d142a6c1e880d851f589b7fdf16fb3598. 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/QZMEP2226973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c8c6eaf18cea249a39b518a057446aa5c96e59bfeaf671af484463387afa00. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/NL8RL2413883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a2907980eb62b010d0c03f12fe00569709646019100088bbe02174318dfa27. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USA2P2449766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b7aace90f662d9b9d34b5982b9f33888999aa79440ded75c774ff5a1af5689. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL8RL2463286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128bd5b879fbae74b6744517657c5675111b8bb7fec7633cf5ab72904850f762. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/NL8RL2463301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad167c2f52801b3c3a9ebfb75eedb64fd5a2b4716c3747c4d2613578f2ac46f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NL8RL2563221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f46561c4857d48944b5936398747c3018f09bd746931eb22d8a0b64aabf8d8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NL8RL2563222.