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 0xceeaabf96ee0acc1745bbbd537a76018beef03abeb236521fbd4ff1db64de982. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a95a50f1-99fa-412a-a8e5-9a2726a9fa89.json and https://artists.proofprofile.net/proofs/artist/a95a50f1-99fa-412a-a8e5-9a2726a9fa89.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 0xd1f2cf13a3a85fda9e806952166d53f00f953f8bfd2ae98d7a0e2206ede54ffe. 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/MX2832432043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5c3054492659461e435100b54c6b5fcc247ff4356ec7b10f5e03789d815d1. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:08Z), 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/MX2832432046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb6e7ccf00c200a94687e41874d011beaf918930cdb89bc5562dc0755bd25f7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/MX2832432054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7a24d7ab896709f8839f9bc28a0a60a71e10e1472915abaa50bd5e1e1f60f7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MX2832432040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dff159e4e565ed2a50d5f2515aae1654595ccd24f5098c151fa79ce46f3573. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MX2832432042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660291bf440057c2de8bb2603d6cb73596026e0b1d098446a547af3887fc186. 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/MX2832432036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916d10528ccf283c05f2941c18cb658d74a69fa992f1bf939afb079b71fdc4da. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:03:43Z), 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/MX2832432044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c97f6d234e5b1dcad49cc2f5ee0ddebe522a4d4e86fe04f627a822f48ff084. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:05Z), 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/MX2832432037.