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 0xd4ff1095cb483bf6a3a562e205a40630c28e90d8976f34d5be64439e84e00cf0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/934a7da1-a27a-4af0-83ea-029419245508.json and https://artists.proofprofile.net/proofs/artist/934a7da1-a27a-4af0-83ea-029419245508.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 0xc0179b44740cc04687988e28fe951a13e11953fd4518032fb61a7b6300998d3d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/ES5531001212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13084c2a80c749337dc20f14002d6288807b15f1c28af48b62dd880d1d463076. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES5531001214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafcf0be58380b33e4c1de36a7d625ea81e3101847d303ab7908965876676d7a. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/ES5531001132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbb19ff95769fffe0ce2dc0a001fc32091408d4d7a73e639bd3c0ac03087894. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES5531001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee55553209dac483451c954336322db095cecf07ec57b1f8edf96e0883049b90. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:50:27Z), 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/ES5531001086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3ea3974792cbf391e3598064a7f0878fa40befd1cc58fa466dadd5c753ee74. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES5531001194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1a337b3250231cc0e9834cabbedcd8fab63c70aad0d3f729e301f15b5f2a14. 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/ES5531001202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba77356fb473d550ed4d677705d2afb273a3f6c456e597e7aa319f3bb91b6cfa. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:28Z), 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/ES5531001205.