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 0x0ae04ba21489b9d6ca352dddf77ed7afac2f27490cd40c921417bb1eff9f64a5. 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/cefc2ce8-00f5-456e-9f86-f07a53027b3d.json and https://artists.proofprofile.net/proofs/artist/cefc2ce8-00f5-456e-9f86-f07a53027b3d.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 0x64a822021a60536cd89adb1e989ccd38b6e746a141f678204a74af93a115a3b2. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:01:05Z), 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/SE4AF2000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404981e4f819a296f4b9a0b210c9e28bc50bb202b2d78a3f0cec1e68e85753bc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:31:36Z), 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/SE4AF1900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a163762fe443b9f1fae03ae3f9c1f4afff20f95d3308f65157f817e2d126fd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:39:22Z), 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/SE4AF2100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1e53f10e862d541b0be017d84b288d983496d279abd1d954a01c06cbd0ccea. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:09:53Z), 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/SE4AF2200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc8c34daa0484621b4fced3f5e0e2ca56b8d1206f82b5767dd7098656063c28. 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/SE4AF2200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebdc03d0772a2dc12a162ed9b9e51a822c04eeed7e162036b6e6a9d578b5217. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:45:56Z), 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/SE4AF2200303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fbcd2303d36d3ba6938e842f429d78bce2560efe1ab908405fae4cb68f9d47. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE4AF2200305.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbe58198aca8c9675d97497e063d7bb16094db670e7582397309b91b92fc92e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:57:30Z), 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/SE4AF2200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7006a9d4530b24eaeda612e70f57d235eb675326d20ea5b280b8546a431d17. 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/SE4AF2200309.