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 0x30c0656127c219035e4943276112ad2d49161c82316212f90264ab7453921e8c. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/302f7a51-0bdf-45c5-a24f-70415ca3f7c2.json and https://artists.proofprofile.net/proofs/artist/302f7a51-0bdf-45c5-a24f-70415ca3f7c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xa5b9fc844c4808501604eec838c6ec61f6eebe19b86cf32eaf4e42861aa62b62. 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/QZNWT2535873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f558b05763d57893bc70d62c5bdeecfabb91275c6fb9cb93d37867f57fe83a8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:10:57Z), 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/QZNWT2533891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe481b3dc8855d1230be2143631303574abb5f903e3bda454d8a46c163554d0ab. 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/QZNWT2533892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a6bee8742598a3f44a7da66055c1ffec8da463e08bf8d2f94cf47897e1077e. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNWT2533893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc89441c8f41ebbddde96e08d55aef5b7ed9659d8d756e824d611926d412526. 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/QZNWT2533894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5e2ae6abb3e4b6c029124397576dd3ce90f70479117b3dd2a1c44b8632314f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:59Z), 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/QZWFE2531089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b5224f8ba851fce6d65b6ea8329917b0499c286d7421c7bab09d44e86a33cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFE2531091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c79792b3e4c6fd7806bf7b1e40aab668100cb3d1a6889e00fab73f11d427fe. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFE2531092.