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 0xbb01df50ccc3946bd9a56d6dc20568f0a50e4dc7ffb9a372ab18122581874d14. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f20d9f36-1d2c-4d06-890e-f69479d6b1b1.json and https://artists.proofprofile.net/proofs/artist/f20d9f36-1d2c-4d06-890e-f69479d6b1b1.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 0x1dc367626af168e1cff5bc5376750c8bbce4d3d24fe9dc4376a1cf2e0b219fec. 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/QZDA81872350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d49f52a2952550ac2aec95200e54895b92bca663d3f699ea7904d1a10e9502. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/UKW742300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9d18f392788e26d48e8e3908bfd907053783de52f1dce99dda9b3ad438531a. 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/QZTAT2389321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4218542cdbf5682720a7c8995e7e46388d35b20d2369748f4422522e6bd22225. 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/UKW742300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e763b8216d14f7aa341fb0e74d8c52c56401402660cc01f6adcf7f41514f42. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:40:24Z), 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/UKW742300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9935823a6ce99d9ed7f8a68075162f3c6bfddbf9ea5354dd45750583872a0bd4. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/UKW742300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cabd8832ffe285e4d969daec34ff517008a5efc69df811bc5c4dde761d425a5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6P2442849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba75fd9cd270f42a5338b234c2099ac43da84f0da9dbd6312b31e5ff8ee7c20. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKW742300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d8a50563df1ac951e258a3a742c1efd3cc8bcb5dd7ad26953ffe3766a3ff7. 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/UKW742300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf977c7829584cfc751cc965e2133180a0f4a27a4f6250bd6dc446ca6ae57cb2b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:16:25Z), 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/UKW742300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a4f6cd511e50de8330157191c408e6a34b147265521c3656d0852900250498. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:50:11Z), 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/UKW742300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7183c567b6408d800c20c2f16a4ab2f6376a2f435a3faeeb004230530053a2f8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/UKW742300010.