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 0x841ff9fac5e5a8ca502af84fab90ff453d9516686063891cf40a7a0bc85fc9fb. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ca5dc46-0b8b-4f84-8fd6-1817beff6015.json and https://artists.proofprofile.net/proofs/artist/3ca5dc46-0b8b-4f84-8fd6-1817beff6015.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 0x6e9435f247ae3e9ee7312bc8129939f162a217e408d145aa6fdc308ce639992c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:49Z), 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/QZNWT2099043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0328b99846e2754e45f13557b5ec3bac8058160fb6d8b35fe806af93f48c1f4a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:27:00Z), 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/QZFZ22106016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a268625cfabecf1d541e31137ae6cd2a6c4faea2d40289098c3dd0f73d2374. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ22106018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917332207a7a7b5296be38de93617caf3ea052ed7ffaa7eaa9f5b490973a95ad. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZFZ42376837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9266a82ee679e7a8a402487023a78d9e43f3222b9fd662775e6a3b6975e65d7b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWS2427162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5c67f60ea3437dda95288a06a8b4c470efe306d46f35ba6d16898881c3cd0e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLS2468117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5f347c6f28ee3a636c77f89b6df8ff67b8a27457e81254b53f0f185f8af4e5. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:29Z), 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/QZPLS2468119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c811afbf6e0cd36c45eb7e03521916634577f778015fac2a605c51c1ec2460. 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/QT3EX2440704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18591e045890da516c59bde4478ca8efaba0e004175b2242c0cd1042f846b9a. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZTAW2567433.