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 0xe0e1579777eeea8f0b74ba7f6dcec923fba274091eab739d628e98cd9f7f2580. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9021de34-dcd0-4700-a162-81ee31515383.json and https://artists.proofprofile.net/proofs/artist/9021de34-dcd0-4700-a162-81ee31515383.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 0x10ef3c8f9d9ffe81a5a7832256ee8a94d6fe7f05d45bf85b5f082e8e3321a81a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:30Z), 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/QM42K2590659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ffd227a1025a24418688a1194819a630b7d6fc8779639365a537563dd70d4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:48Z), 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/QZMHP2534282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679f9e8d79fdd359b757e9adb753c26ce1117ed8270ede27120e312fcf555198. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QM42K2505020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee891c381e40f5af87e6a5ef68f5c7cdbfb8d715e7a7514f33df50ce4c47c742. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZMHK2580357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae1be35ce4926251714903dd592c4821f15a443f709821ef9cf91d93d2e5b13. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:54Z), 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/QZMHK2580331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f3def240e98fdae700ac3b939a82eac2d606978bad01431c221391aa6749a0. 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/QZS632566684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9512c4f8cfbcaeb071b8f1def971f8b5fb7b1a08efc7cd89947e0a4dc073b8be. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QM42K2594688.