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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c3362643aaf9e68701f55346fd75669ac9a09187d709f012f9f11628013474. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb4e2393-d1de-4f1d-9a18-88f1a43414e5.json and https://artists.proofprofile.net/proofs/artist/eb4e2393-d1de-4f1d-9a18-88f1a43414e5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5ce9bef17b3cee58cc89faf3e58fa47e4ddd8466e3c251c3149e5a3ea2f102. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:30:04Z), 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/USX9P2343169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb7ccda3c2ad924e22b12c2622ea71ad77b0b2d9f2be133d7496524d2e7056a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:26:52Z), 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/USX9P2343171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a977184ee3e6132a25f1bc1b9f696012226e4ab9be8717701e8260c4364a1d7. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USX9P2343173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753126a6e372821ce072b89c4988d0e6ef1a9c8502ee3c951c74fe50b655cbb8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:24:46Z), 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/USL4R2349743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da51564bc7c69d5bfa2bb53372b57a55edfec65c2ec393aa39d2fe0bc7d7afd. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USL4R2349744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9914eb9542b53d6bd4af5f96b6ac953daea4631424d44218582c036f0d88e286. 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/USL4R2349745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9becbd5f9bf36ea6243997e1d03797d4dbbf95e1690c58ec33dbcbca829d843e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:11:19Z), 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/USL4R2349746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9101cbed04a115c20afc1c69ec6276ff02cad8a6aa12928d83a48c9565db362. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/USL4R2349747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e478aa1496df18af106828874c8bcfa49172f21263005b0bc31bce4ab73c88. 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/USL4R2349748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f667389c29ed92798c4070ffdf1d51e06c4d01dc3af772a2a446e9f3f7d9ff. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4R2349749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29daf6a6c5c30939136de2f4939f9114038cfac3a41177df66f9b6cd748d631d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4R2349750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5d27f7ea393600220f9f4b3c9d767b2df36009c44e301216ee50d9196f1d3e. 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/USL4R2349751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed319c74df8491048a44c72324a8ee7b3d0c7dba586a1897201954282a0ba3d5. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:49:43Z), 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/USL4R2349752.