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 0xc40996bf1257a0a78d0527769dda8d04acc5eb5f7c1fbe278852a055c2c9260c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b4c4056-423f-453f-b92f-d961c4ac163b.json and https://artists.proofprofile.net/proofs/artist/8b4c4056-423f-453f-b92f-d961c4ac163b.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 0xe2b051ed6f6e1b540a44af419e0d798417c08a61d71d7787e51b7788175b1e19. 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/USHM82157651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b508ac86eb54298896bdac07bdf1b6bfe63e9ace30fb5f2f00e8694d20dc9e2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:42Z), 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/USHM22252776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfa918490520404d614cfca5200800db401ee21e88875e78c15f5ed4393b00c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:31Z), 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/USL4R2357799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b55203137c17222b919537b3dd53dcb47076c169b2d3ce583a46dea5788a6d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:08Z), 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/USL4R2446781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89436bfe75f4488a483631685e904bd94ca79679b15c7161479370f9a6632728. 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/USX9P2413505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dbf0104447545c7d752e1f852173d91b6b8e6a2561ec4b2c6ff75b4aaa36b4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:46Z), 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/USY242471165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35761b0e974e028a04832807d500462b9df43102f32ce74ab0a7fabf57adb14. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:42Z), 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/USCGJ2576724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc113145767f94492c3a0b6c1d409e92d4592a37873feb190a1156758d2a451c7. 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/USDY42562621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a63dfaa3e692cc8cbebffeba146283539b02beade279ebd5ec0a6c1ae050ffa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USL4R2532215.