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 0xa1e03f07ad69e516a2f992e227ed9d9f212753ed8980a7cae03e60de066bb8cc. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5575eff6-5504-4460-b8cb-c1536ad6d272.json and https://artists.proofprofile.net/proofs/artist/5575eff6-5504-4460-b8cb-c1536ad6d272.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 0x44314db592719e4c53c320a8e039d36c4e852bc82c9aea34e2d8570c58fba0b5. 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/UK6821890214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900180505909fd9ea44280a72d6e4afa3c78479e03718aca7aacc0dd9de3f1d1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UK6821890218.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5e50925ada0d824ef3f3e0736e4bfc4b6f69330127f89cc4d5ccd1553f952a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:11Z), 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/UK6821890219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e1e9e2b6139323201aa9eb36c3a67d25a5ae50f23d5b74757b0a16432eb79b. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:41Z), 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/UK6821890220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d8953dd758ca7da52bd94583ecce8d25d3deb58b6224de3515a3a797448c0e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/UK6821890224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3e78d92f5c60ee0d1a91a1b99b99d5af84e6a59f593114bb91c4ed9ac7cd05. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:49:16Z), 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/UK6821890234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd85d581699f630e0fb64685de8c2195d0e15c7333f28cd09dc32727a9dbb629. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UK6821890201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a314b747345c9a760e74f7ebe880d545d3f7725baa96c4fca17f9aa612f885. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/UK6821890202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa83a7409b639283d5e276bb4515bdbd82a7aa1af57aca3b457e8008ffe6a665. 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/UK6821890207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb356b716cbce81ce933527f9e130fb1aa407400b9d1343bceb35fa2d83df9e18. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UK6822125702.