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 0xc3150d2b9f820aa7f224980902ddc976a76a057dc781626754d90f81d987d8f4. 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/4bbcabb0-5b94-42d9-926f-c9fb9846ff56.json and https://artists.proofprofile.net/proofs/artist/4bbcabb0-5b94-42d9-926f-c9fb9846ff56.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 0xff05d02681f5e7d1b59750c251603bcbc949e23fc6a484afcd024f8ff86f1824. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPJ591701144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59601960326d77794a1232995a48843a2cf5533d0a75d3b60dd19edf6232172. 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/JPJ591701146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeabb1536b8fb95f3095506ad768c6eb9f001942cdcc96f7670e33470b6151b8. 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/JPJ591701147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0188a65dded698f85dc269c0840d47aa0fd9ffe5a18163436996c43dcbc216de. 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/JPJ591701150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8513d3cfb023c77f81bbb9bbcb31f29d4ece6bc576eac2ea339c3371a350f9. 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/JPJ591701153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041ec7ff09687dd02bd55d475ae39f15a79af242d31e43de3aacfb45386679ec. 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/JPJ591701156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ef78e6f481008e40a32b5cb9c8cf1fcbf4c0b4c314054eb535a6a11bd44539. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:06:06Z), 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/JPJ591800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cca995f2a40798a299026a440190aaf153e30f29dd7559471f725c61191b3d0. 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/JPP301800670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e34778da59507581daf2c610bff26ee2d18d1a5c15a97b2f27f8a1ba5b7f374. 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/JPP301800671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd927f08bc42657556c387214df49fc53fb31bc721ededdc84fd99935957104. 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/JPB601893707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a4d177aaf4fa2906857e39f6dcae5f23be32f43b182851c364741833f8beb0. 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/JPB601893708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfba24d64a44e380c37e3d5e7b772410b000d3e5289b0cc16484b43c745f290. 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/JPP302000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432b0086ad932fe5c4a56bbf8bd10a822fa0f39ed93539d29038eddebd4e0bb3. 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/JPP302000151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d82bfc4dda1f41c84a23a7b236ff89ceadf2176e7b96a34866aca537003f9d. 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/JPP302000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4876ec965ebbd26302495b7b74e55e09df9625c9325c94da935f3c13f3512d6c. 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/JPU902002925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7614171c521766be475d5c4e8fafecc9b32ad06a359361b87d7b8669323c916b. 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/JPP302100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9ad98ee6913ea9e7aad2963cf0b7495f0d0086673d347b90a939b410ff5e87. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:43:11Z), 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/JPP302100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe001cdde2061eb144adde3394c1380d85177ce17da3f768eb4e1afd865198487. 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/JPP302100944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cc672146c4c7dd11b5cd84de0cb7a895d3e2d7cfc8f9718f91ad9ab4ba53ad. 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/JPP302101765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe001cdde2061eb144adde3394c1380d85177ce17da3f768eb4e1afd865198487. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:39Z), 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/JPP302100944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa6ed23860db2f281aa8a5ab261ddf3bd3ffcde78fdeef561ee7a83c7ffd85f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:42:12Z), 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/JPP302101751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9d3d659e45ad6166332fdada8c9f255b8ff20f6c57b7dfd00c678f9c9ab1c6. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/JPP302101768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d82bfc4dda1f41c84a23a7b236ff89ceadf2176e7b96a34866aca537003f9d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:37:31Z), 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/JPP302000517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69077e137977ea5eb170fe929831458193e7f331d20b33e5d7ee703c88fb3276. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:08:36Z), 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/JPG102300197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2cfc2fd72987c499c0b78beb61b62c2827f45bbbd8bff7d0ef0d61fa4d30be. 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/JPG102300492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13568d42d47acb0707e401cc56dcbdb34ec164aa1cbd5ae38051997bae06dd4a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/JPG102300511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd172adf26ee4005573786dec2730a9d85df7ba6db15ba137efa2027efa2dde8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPG102301502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60af884d0398b23ba7107a36713a6b02fabc59813593f6afc118fa035ecedbac. 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/QM4TX2487177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c84e7ca3c8c60b1149333a70ee3159e5a5ed31c23d600a3fa83ca2168b8dd9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TX2487178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb324672e29e0e25a4df386554470863f4a409c38a10f1ae3773bc6860fc7338. 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/QM4TX2487179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3780abd5a43baa3424b7093f1b80150cfd345c149f6b9d4ac8d250c5199c1d0e. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QM4TX2487180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe962fe0855369ad545eff47dc389b67b274b8962db48aaf3e4131febe22be8a5. 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/QM4TX2487182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486ffac6966a9e16fb5f8edbe9bfaff5cf3ba77b861dd4e3fbc8951ec1a52fd2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMDA72464756.