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 0x34241a79b2d5f8ea5333dd5a6a1a0cce640819da76f242fea3ebe813daa8727a. 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/e8aac74a-737f-4c0c-bad8-c54b223cb243.json and https://artists.proofprofile.net/proofs/artist/e8aac74a-737f-4c0c-bad8-c54b223cb243.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 0xda9b781722a470754dd3185cf98fa8ff5f8639afb59e2dfb9a9e389903c7c8e6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNA1986613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3570679cee9edc50d4167f2a39e4b4de93b43b8138a11eb7bfa4faf63a3f5fde. 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/QZHN72274435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9494ba21516107a33988dbd610f225f2d11dfce495529f541904e6c2316df17. 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/QZFZ62292713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff0b28783c8ff540aa4cd19ee9d12383bc181d14f597466c522c5faf747dba1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN72274436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7172254c2cf2f0edac7eaf443dba388e421af1a3881ca5b2c596dab952711366. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHN72274437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8304ec440da1c9829dee8f8a0aeceb54d0f9731c44d6d3ba2068dd94dd9243d0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZES82232660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc829c7e5667547a09d051c7476c69f268664fdd957a69a70f591dd692e346785. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA52442572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0fac90edaf6b22403ac0f2dafb92ea7bbbcd4df40588842df91185c8e80b54. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZES92482076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2854439e6c3274758b43f06ce4847380ce6ecc214f27023e6b2229bc00fd8cf3. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZS7J2401895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482874efca5437801efcab341663eb02fc7a279ef0d75f9c52f9be04c3110eff. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZS7J2403478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90bea1b8d2f39034249e299e2327bb7c4b77eef99d57b90911f9e5b55ac9963. 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/QZTLA2576032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811a0adcb2b21f3d77bc5c529e9efdcf64326bb27e613781770a2767e759360. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZTLA2412147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2854439e6c3274758b43f06ce4847380ce6ecc214f27023e6b2229bc00fd8cf3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZS7J2401895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bfbf4dc2afde6f4220097726a20f5a3f227392e05bd064d58d6c8c545f3280. 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/QZTLA2545890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482874efca5437801efcab341663eb02fc7a279ef0d75f9c52f9be04c3110eff. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZS7J2403478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0fac90edaf6b22403ac0f2dafb92ea7bbbcd4df40588842df91185c8e80b54. 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/QZES92482076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75601becbd2845038976da6b112ff57b02b62a4bba42683a64b4f51850b6ad03. 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/QZFYY2434829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc829c7e5667547a09d051c7476c69f268664fdd957a69a70f591dd692e346785. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZDA52442572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efb1b66a574756fe0266d0b92a19e350835c487e5bee52eee4f29e4096b589d. 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/QZES92450867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4342ea6511a12dcb44192e400b7468d78cd158db9cb5d60a86c903b733ed1837. 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/QZES92482077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524fa0002f4620b858983b198cd235d2cfa097909998b4d98e5ac029d8776732. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZES92482078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc308c6303408ae6201a5da18766dc6c80c86a370cfaf7e5dce0625b035602395. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZQAY2521208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a55c30a787f1e56d883c406c1240c4e166d155bf8782318fae0cf2c639cfb1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZSYP2543563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90bea1b8d2f39034249e299e2327bb7c4b77eef99d57b90911f9e5b55ac9963. 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/QZTLA2576032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa811a0adcb2b21f3d77bc5c529e9efdcf64326bb27e613781770a2767e759360. 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/QZTLA2412147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2854439e6c3274758b43f06ce4847380ce6ecc214f27023e6b2229bc00fd8cf3. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZS7J2401895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bfbf4dc2afde6f4220097726a20f5a3f227392e05bd064d58d6c8c545f3280. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZTLA2545890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482874efca5437801efcab341663eb02fc7a279ef0d75f9c52f9be04c3110eff. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZS7J2403478.