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 0x182a9195ab649b06c62432cea64f526f3bdf1af34792ec4ab84d80465127c39c. 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/d5ae8397-a8cd-41cc-98a8-a9d7193d073a.json and https://artists.proofprofile.net/proofs/artist/d5ae8397-a8cd-41cc-98a8-a9d7193d073a.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 0x93929da844ca9be93e5a53805b065c72dd6b6da3a4078b4fdb6c1ce4387166e7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZHN52056043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5838c0742dc579856033ea8f5619922ff0906f7dcc9a1a9da1e70efa7af4d3dd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNC2043731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef7c6dd53e3798c338c36b895bfe4abae8d750a059855fbba6c6044c78635e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:50:03Z), 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/QZNWQ2012695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9abdce6c1a2696038830aa3147542acae5b03c1591af684efa48358fa391d68. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ52176320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5004a3c322d20b405d05203a1bfa8d40e0e7d43848a593aa6f488ab7c2348f5f. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:08:03Z), 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/QZK6F2161971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9b49420ccca80e4e029f8d97e3df896d184de5cdba49084b7fb15cf358de81. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:10Z), 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/QZMEN2281439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c37df7d04d13ba3c70310c9c08a9d44373fb157a08fee35344cca4c16a07b6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMEN2281440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cf9234ed69426771a95be80b6b917d0efce2bc5ffa8c7d77c38a0efbf5d89f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEN2281442.