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 0x0b67d79108acc5de83bb302ed0681f4db8b696761ca78c2a0af7d36af493c689. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/143ffaf9-e0fe-43af-9ab7-f7e253c6e1e3.json and https://artists.proofprofile.net/proofs/artist/143ffaf9-e0fe-43af-9ab7-f7e253c6e1e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beginner's Guide to Oud & Lute Music of Nao Sogabe
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 0xf33982526cc15c1038f81248da544927bdc9d959bb67cfed3b363d0204f7eeea. 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/USL4Q2200356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788b00204e5de29465deb1919f5c790dda8c4d8c6f92139dc30e9485970729f8. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USL4Q2200357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2094cf8f91df08be70cab90cf8c60da259b48c759b17e350e5b2c0a34f052928. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USL4Q2200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc38c78daf77224d91076eab376a44c0adcbeb6eafa784c3d3087d8b62df3267. 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/USL4Q2200359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd25a6a1aeb6000ba7e1fad7f208e84b448d8b7769f8de2c0c07033c073f1e61. 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/USL4Q2200360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d55a1c626f1c4a03bc41524548cbe2a91ab53370534cfc888aac15b5e11828. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USL4Q2200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1051a4a98de2c4fde39e9cf6bc4286e40d2334a07e79b40f90dc4d69ef24248a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USL4Q2200363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27802f932b9ffa52ed62c291d07ab02d804038bf232a21c2957ef61ab8fda5e1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DE1NF2400060.