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 0x4fdd9cb634e8aaa3932f5c6a3279d16ec9c87913c955e9ba96200b6b7ca2fbd0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5c0e091-1cec-4fea-8f2a-3dda12f379fd.json and https://artists.proofprofile.net/proofs/artist/c5c0e091-1cec-4fea-8f2a-3dda12f379fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sones y Bailables del Estado de Chiapas, Vol. 2
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 0xf975167a3de09cce15469a1bae21bf4102e7cc74e000774e595c088573a7588d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:25Z), 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/QZNJW2039303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f140ef37bcb10df6021d0d1f9308fc43a2a7c3e8cae086833aaf5cc8496084. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNJW2039306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1348df166d8e37e4df0b27847618ecfe1d6f81904269e05d27ac4172a3e0aa58. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZNJW2039307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db38d042e132441e1c3cd83f5f8ac2e36849850a493133954002a0a3abc5e8c. 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/QZNJW2039308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7131feb2eab1219ae9f75fd5d02297323574de266f5e49e907ce2daa35866465. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:42:43Z), 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/QZNJW2039314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a98f111a24bec04191cd8f9b69028a6ad551679b4283fa67e082a3007e2140. 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/QZNJW2039315.