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 0x2fb42452bbb72178360a1410e8a7b2d695fe460d6f98d1174aee90e972a90586. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7654770-8b79-4551-b45c-67ec159ed262.json and https://artists.proofprofile.net/proofs/artist/c7654770-8b79-4551-b45c-67ec159ed262.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 0x6046dc5e55c0f28737d5281ac0c9c76e793ccaa7f0786cce224b5bcde8cb1da7. 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/GX3Q92164565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec95baef88ae9a096699a13be554e8f8fcc56683b30f520d5acb642c70e3ee10. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX3Q92164564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d229b5d2e2a2802fa81859dee2451c7608a769c3ea111f91aecf598ba2f6b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GX3Q92164562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe4db733dd1ea7d6f5b3838cf7dfefbe63c7aa98526c40bc0e36db5a4963168. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GX3Q92164560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1b7fa6b7ddeaf29ba6e668faa6658a25184b4293da012c86bcd6cccba744f4. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GX3Q92199071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc437111d347977f24875f73156ce7a0376be925b09fb3789b179be2d833a2484. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX3Q92199072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5e8f6777d21f581f01441ef547f5e33221e2bed642a96b121073ed34f37c15. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GX3Q92199073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cc3121328c6c3ff6724cd798120eb98060d49707db02c33754dc5c4d97becd. 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/GX3Q92199074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4006c4c891a4bbe8ba431ca46d91c7552ef6038c177e9931ad97837f2a2b1be. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX3Q92199100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c30361a5de28db2ce708b386b726129d47f388b5323c07f56bb8b8e008eb5f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX53U2001296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebaf4fefee8ed7b954bf911af75dd6cf06eb55c533d1da1fbbd9143722c50d5. 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/GX53U2001298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdfe305b081e9e6d7e633969948f2602c646228ea9742d4f63b431567bcae12. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GX53U2001299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e237a1d84ff2dff0b05f06b11194503692921b8bd147fc9c3a8f33afdb265a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GX53U2007583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22da827a761cb0707f0d892317b1b478ddc40bb2f15fb75b1e59cfe8667544ef. 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/GX53U2007585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14056074c371968009b4349d3b5b5abc338f6092b0e762cc3a2c3320ce4321f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GX53U2007586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc205731e9a54f45709de456a1ddab9be240236e75920e9f1b4065cf1f2037e74. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBMA22125693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cc9e6f099161d9844a274ab586a8fb28067daa9e9ccf7a83b9cee4b5017c42. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GX3Q92199454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa748c00590c0d45310e860bc161022279ecf28a1dc7998d937b1c66a6253171b. 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/GX3Q92199457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efbe95fb4fe77979a3069aa8220ec546d34d084d63a8e3ba0bbb7403c0f469f. 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/GX3Q92199458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d87ab6b09369cf84cad3b5060beccd1cf3fd25c37dff692c39305e060131da. 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/UKXN21917203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be192464d57acf2fac940578c5b0868c9c72dd486fb84f009189c3bc4dc122f. 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/AUMEV2263291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabdaecda7835e38fb64617a57b66441ade94ecec864d840a23d2114ac187b0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6K2010187.