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 0xe6c81d7564a4d6de70b08995f6550d97d07346b94efab66ef1204b1de6b5fd2d. 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/3e81a836-aca7-49df-a219-4839fce6bef9.json and https://artists.proofprofile.net/proofs/artist/3e81a836-aca7-49df-a219-4839fce6bef9.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 0x90cdce9dc9d09613295ffcbcbb9d7d7c883427e9f1675b9555b442aee64d6241. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BXTRE2000192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08675f937609a05569cc51b57456d468aaafe0eb3ea849d12cf219021397408e. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZGLM2299859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3054ea123b78d1ac8cbc6279c25f55ddf244e43ed78a80bdd10e03ca13eb5201. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZNJZ2294113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c16825794b2864c21352a7f9ba5a84dcdb3b44272e195083fc8e490d9f58c14. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTPX2240134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8354d748ef48a384d394f9ef014d7377ea715e63e2bafcc1a2a8390a8bd20f1e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZTVM2288272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cbf18c82266d05e14d849019b29444c25550619110d40c6c95581335d9742d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNJW2366759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2fd2781f63498ad691e3657fb7d7a08e630e33d2dd760344ba2cd78db96c04. 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/BKU0H2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bba3faca1ae57fa1a4afb641ad7812b60b7d0e915a72b9c07e3b2e37db53fc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BKU0H2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b5e81b198a7b941dd5f55384e5b3751fe6325a6e2ebc2a4a672df72cf6277f. 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/BKU0H2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e5d5ec327fff37cba32ad3551d1284d7c401467171d9e6dd753b669e1ed612. 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/BKU0H2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7ab765f2125151830f27b9eee3631ea438ac91878aa7a10157976581bd5e7d. 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/BKU0H2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597332d5a18506592291d234fb9159f71b44a3bad7358f6c0a05727902ed0044. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/BKU0H2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6f19fdaf2aa99287ed478e879482a42f3307f6fedd8dd7dccdacb5a4c371de. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BKU0H2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5c176078b61931da4ffe348517cf71bbf7d3ac4d52e41b33a219f613db1849. 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/BKU0H2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a5666dc93e8a092f32901d2cf3f119f620d4bb2033f853455f915eafdcebc1. 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/BKU0H2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ad69a05ab190e93dea5da8e726852d56347509ae7d5573920610e5a970fe28. 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/BKU0H2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe553a50ed792f541257b84a777f23cefe930b19874adc02d8fee2bdf5109185c. 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/BKU0H2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8967244022479db1cb355b92c19ae345db81cda0d35bd372005062f6c588de. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/BKU0H2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09df5f3b88af44200fd537060baec07f68f70ae299cdb4a6b1cd0f77503251c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BKU0H2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf4bc40678bef62a5493cfd53d11e4cdb3eb7134f5efa2e53551d07a3d27648. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BKU0H2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf8019babda5c449cd7a8cdeff64a6daa71cbcb203c8392559a3494cde2de1e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/BKU0H2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca4c10e54ee5ef5e54a1afd9b7f0527316789fde2c286cd579fa51bf8a8e751. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/BKU0H2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28c53bcb801ce6cf703acb1f16d2ebef93edd77b94e6274947ee37dac696b45. 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/BKU0H2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3aa97d1fbc252d3c004cadc30710bcad4cae89bb671d670dd101bc39811591. 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/BKU0H2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df7c24f8f8d8e296a1e8a8829e5802ab55e58e408b58f8bcc30aba58a59bd7a. 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/BKU0H2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a68a0068a67b8c2f3fe5ecf1cdecc2f22affd65991b01245eeb322523a1796b. 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/BKU0H2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23879164884407b72839e3f969345f715a57b318af068e0708dee54f4cb75d9f. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/BKU0H2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011bea011962607400cf9e570287dc02ad8edf8ae373a4b0c4d8df20612c04af. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BKU0H2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe227ce52c31ca2101ab078f40459019771ba0334d2ad9e75fdf1af202c6d8bd5. 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/BKU0H2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cbfcf632c93e9674dd3538b57ce0b4a32bdacab30287538789ab1b436d755b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BKU0H2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61140b4fc71974f546d57b9660ae8c38219111c856c4da89a8dc9195cd85022. 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/BKU0H2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546c87795760c4811fdaeb725a4baa1e6474902a97f1a263c892038459ff789d. 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/BKU0H2500022.