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 0x9783a00b59c0e846a079cd8aa7a43ce0e105fe8c3b76cd380a9332d35dba2a4f. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb49dcad-db1d-4e4e-8b1c-723ed9a8301b.json and https://artists.proofprofile.net/proofs/artist/fb49dcad-db1d-4e4e-8b1c-723ed9a8301b.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 0x81609afaa9da9ce5aae1e25060d0be4dd9d0b6960069a4fdd19189cb7d4b5c51. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZHZ42179920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3fe874b963672e2059093eba8111d98ec9253e277daafaad3bf0a61eace054. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:24Z), 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/AEA0Q2189132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30d8dd3057fba8e1b12875f0ba9e4dac4a6df2ec5ab10254209c99d765e79d1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ5FN2416576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbf9605da32cff56bf70e52fcffce460bd32daffe8cb752b85c468dd597a172. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ5FN2416578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78f427dad609d36080821adf172bceb5c494730f38ec380c1d6cc33eb654e80. 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/QZ5FN2416580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9a1c1327e3375dd7b92b9ded0cc21f0a964c344a0b0349858cc0c2bf3e5931. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:27:02Z), 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/QZW9L2466785.