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 0x30e4d104837e17c505e7228fc6c23371484842f6b7b9bba853559d88236b7fcf. 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/ce9e6bb9-b110-4655-ac43-71186ad692e9.json and https://artists.proofprofile.net/proofs/artist/ce9e6bb9-b110-4655-ac43-71186ad692e9.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 0x976459056cdb44e5625b578d439695fbda03ca2c46236b0b3d8d055120497229. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZES71932174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8581c3841024af7d899ced7752219e855aa8b04ecd957837b02b461f9c6815e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZFZ71986288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269037cb91f16149832ad089c8d82d497bb8617aea6b288d1f3a176afc666922. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ71986293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e1121214f079037ca81036ab8b9846618d8f212174bda0aa4736f7870078eb. 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/QZFZ71986296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd06668331dd4f9114ef0d8afa44d514df5de479c632a37e9769a59960661c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES71932175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea491f93bc3783b54c794965148b3c68703edb6fb01639810b64cbe777c5172f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES71932176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47bbd61377b050ee10fac708cafaf44dcae588ac3bba83b04418bfe3dc65e55. 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/QZES71932177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99de80e6cdb9f4bd0502be0a86ffaa471799ef09e6ad870992540eee654a3123. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZES71932180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc7599d51411a2529308874cc2a2fa948c2c90e814de5039183cc77030a294c. 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/QZFZ71986283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc11c36c3a0976f3d5fd009bbcdd48acadf04535c0af7e623607f49c7e2e98d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZFZ71986285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eac4f5b4f2c72b559de852471c48cb01b746ac75b38f77a0ea6a51088549a1. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZFZ71986286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd0e1a187837e22dd3c7abe9a8a70c833a583c778056cd38a14f5d534ba00cc. 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/QZFZ71986287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e520984dfac66e4c17d2823a66fe9d6ab27afe3ce8f4798f60f5cf0339e89b3. 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/QZFZ71986295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523fd9b6c7585fb619399eca5ef3f085e2222483a1e0c0191cbdfcf871b0f8cb. 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/TCAFB2025249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac43e5d9d2903e8d6fecbadb7c10c29e125c324882c57651fabef873df5ed44. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAFB2059685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb37f6608ee2180c0ca14b5e7b6c9d283fc7abdaecd9db766f84596c63b02f2. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/TCAFI2035818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4245d23d787df3d0c9aa5352bd94096239dd739760b51effe552b7ed3b4efe50. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAFI2035843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219510502f715649b1ca961f8cdc91f8b2869958b43d8da41d73a6d805409da7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TCAFI2035845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714696512bd3be8c1805ac2e0930d214b7a98018a67dda0b3a86f2b1e6a44556. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZTLA2284213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77f6a0dad3e1cb44e0fdce72a304bf73b3a5960c9f600821301409cf68836e3. 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/QZ9452200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532c01361291e8d788d8facd51a4889b3443a2b22ad8d12ad4fcc964ff933988. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGD2244955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aaca18c95aa4ec77a32660097b01adf8cfb875de522d68f3edab9a63bdf4ea. 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/TCAHI2392195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dde9c402738a453b7354d3e47194c843958a87147a59179569740d637ad41bd. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAHI2392111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699da23b695fe7ab82e41126673680de432e0af684594c8064f1168bb369143f. 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/TCAHJ2319335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ee8a2d72f67b0118ffd5eb269a3034b9454f278782f49f483287b3e11aacb1. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAHN2342411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4151081c75f791135977a8cd5f0e4765332e3e645e9723138bdc4baa31fdc1bc. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCAID2419981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba8f8b781d554a09fe6c8eedd3104154a9ec4a970c3bb197f1c42bb222cd3db. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TLVEM2470932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd867278a6e25d8cb6ad20760af330b610bd35dc94acda810625388f07bf93. 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/TLVEM2472714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb06c849de8706757155036db1e658e57fec41cf880f16301080aac06e896ef. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/TLVEM2472716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753412d4a4cd93c8b154716ca9dbdebbe61bb4a4abe6f5ca3141f9a0022d81f6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/TLVEM2472759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef7548a41a0dcb8beb093758d135f1004e48bd1b7ca262bf2fd663acfbeac22. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJI2566014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efb28167d58d05b9b64f6a168beddb4f19f841f42c061e7930c06e5d42a0a9a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJW2589127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93f4db02c87da9746ac4698669c4e0489fefffaa009687323daae1a83c1d98. 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/TCAJW2589136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4814397a7dabfb656ac13c47ecdf0074b60db17538ab03f3474e16e1f2c490d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/TCAJW2589141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841ebd01ea8e1e63e0effe69a409fc64f4fdbdcd385e721a2cf31744920fe70b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCAJW2589149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeb8ee2c9e738bd2a2b9f4e7f377ec77cc822b8aa1a569efdabebb66b9e5d91. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCAJW2589155.