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 0x67f8c21ad086a3e4d6cfef2346196553414a184a2c94b859f7e0fce9004e8f18. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/239296cc-aecf-4956-854c-cce462df62ac.json and https://artists.proofprofile.net/proofs/artist/239296cc-aecf-4956-854c-cce462df62ac.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 0x174ef052469ecb2836365220fb6be45bbf4c4cc598acf2e1f85b26ec7d6225ce. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:47Z), 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/QZDFP1928307.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd625a691232d4ecd43bf0eb514598821d81da542e8bd4fbff18aba9683963a7e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDFP1922998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3412352f06aa43bc96aa6343680e9d869d5b4b822abe618ecff94deb3dcac203. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:54:27Z), 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/QZDFP2146686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8147e9796a8930f7b9a76a4a54438b7c03a1f04ec90dd56c98c9905c2950b5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:30:37Z), 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/QZDA72505959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0bef1b9f4041b3b73adc34a022ccb8417b16025db88c91332f39484e2425fb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN92556090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6dc8e3f682c0957b85bf303568395d49b5850cc5387dfc3d1723d62d14404d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN92556093.