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 0x4bd4b1761cd58d21624dee8af01eff90416337ce707b0c3071a19e144d9a5809. 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/aef04278-d0d4-43bc-a250-329c6f20fed1.json and https://artists.proofprofile.net/proofs/artist/aef04278-d0d4-43bc-a250-329c6f20fed1.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 0xc45a58d461697cdceac645037e91461f1e896cb4de02c92daddf1c70a2681f8f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:53:46Z), 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/USCGH1394699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52596698a6c30c2d1893377d83eb1addab0f90348463e4f97ccb349f47ded9fe. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1394700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e266fae23bedc628d9dcf1be41456d8bd813ef2c95508d4ed814700db9d9ac. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCGH1394701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cef3f6a8a1b1106bb1d80a5517abb622d773007cbbc3835292d84f19a9dc02b. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCGH1394702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79f9eb9f868788a70950b3d935ef00cbde6dfa29df9f7876a9dd1cec89d4280. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USCGH1394703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382ccff2f5405fe96668c4e3f6bbce0ffd05f2b41250ab9b37d605d33ddae04b. 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/QM9AA1539514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7391d498eda4133c807089350eea1b622a4cfce16e704601b0e5c4b0415b337d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM9AA1539515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e476ff0f4329aa173ae47d52104acc85164307a6ab672bdd15cf5003ea5d60a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM9AA1539517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2fed1faa5115c7bf76d2f935f30ffc1333695ee6d3a8e9d1a4c25e1e28ec87. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USCGJ1941577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f05d8fce351d8e7c7ce9232f6c1f133aeb421007a81010e1e4ab6a588c2e59. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CAC9I1906019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36826b57d302e853fce86bccd72478f40cbb62a3ace54f6b3bb99cdac7043f90. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHM22011545.