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 0x2d9b3a56502b8f7b34a7cbd37388e541d41867913d78cc6d7ff89d83424c32bc. 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/926919a1-cd31-4f65-9a18-cf20b19030a0.json and https://artists.proofprofile.net/proofs/artist/926919a1-cd31-4f65-9a18-cf20b19030a0.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 0x0dec5b078ec8d1764902b192c5c4f30c92e341ffc3f740746e723a9f5e86fd44. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZK6K2286169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a9599efbe3e70e04fcf7038a801fe788ca4e05f28fc15debf341b45834309f. 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/QZTAW2243422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ca29fbdd68d3e68e801dea847e4f4b67ada00ac3982eccf3bb964605ff9d43. 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/QZTAW2243425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6348050ccabb918973eb243a81c7ec7b6b5652cba863880f154a7acffd444069. 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/QZTAW2243432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141e6cf4a6dfdf383504d2abe35a50c3749c4659dd9a80bfc1cbaeb420356569. 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/QZFZ22377942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749d41b099e72c63ed2b47ef43fc754f5a22ff91eb507a21e83ea18617cf15d4. 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/QZHN82378760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca41745687f823ffa257dff1e2ceb63649788dd47a1b0ec1aa716498b3f123c. 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/USLD91747461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5c2f874771a380276abbb009af99a4fc10e7ed785c7d27942321e8f96cadfd. 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/USLD91747447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09a36e4f5cc118e62be63e41f15fca4a576cbd09a23f21a937747e871503bd0. 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/USLD91747449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72fd67075e4393911af5593ff0066853ff192a16670c371b96ad9f953cb73e6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USLD91747459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f953b9b7eac359f72bcdf07b43038d5f3a831bc1b6b23aa48b3ffb8f24c5391. 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/USLD91751533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77040a356a3dda49e75c8af14647e11ad41245a8b41ba3c01172b182eb5d9ffa. 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/USLD91751535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b02b3474a1c120d6f70ff878771cd229ae160e8c0093444af82be6a3694a4f. 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/QZDA52479164.
Baby K x ATG JayDee (Pls Don't Play W Dat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61590d9e742d1fc34bb8bd25b3275e097f33b3e2ad02dd996f544eda59cf41aa. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZHN32550101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8332d64c0228ebfa1a3fcbe61b170ac0dd8b0d440686c20f2d1f95c3329fce. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHNA2515343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa88a49af5b82264e2308145ed2aa98b2cb51120b3fa03e7143a6e593e1a382a. 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/QZK6J2585635.