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 0xdfe85e3d90715f3df992a8ef40e79d07a779a0f08e5f141ac2bc2103587d4c29. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2021f424-8c50-4b47-87fc-52b2cbf77eda.json and https://artists.proofprofile.net/proofs/artist/2021f424-8c50-4b47-87fc-52b2cbf77eda.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 0x54d5d9e9027cadb6aad11d992bd7f1556a4d10e13a6f40453aeee67d87ab123a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:04Z), 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/QZHNC2539000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde180298cc94a0aa20af6f7447bda557fc19280f4b1df03fc875589aafa1e5c8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:41:42Z), 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/QZHNC2541198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbd3b9dcccee804092e335910070d15c7f361af5c772b88664d870080a19327. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZHNC2541206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43563fb5dd25e73c3e6b34f3fa9d2f34faef35490cff4b37bc736dd8884185d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:00Z), 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/QZHNC2541207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6093454b9ace2f34f26369391f94172beccfdfbf7ded37d4539289d89f833b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:48:02Z), 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/QZHNC2541208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f5e3ee75d9272fbb70629fe12a84d8155c9b3b52f223d26ee30702fe523c2f. 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/QZHNC2541209.
Lane Sebastian Darlene Laughter Cheerful
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97de271a8cc5fb291ba624f9ca2e83cc80f12ab327ea7846469d288b409dae11. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:32Z), 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/QZHNC2541210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0022708ad1bf707d468f19fc83d869176dfd3c3f89b59b9aec39541b48aa93b2. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:32Z), 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/QZHNC2539044.