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 0x034e453c0f18f8c9ff3e758b821ae48ce814e291fa2214ce91c8f3a6de0cd588. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0da7c1a4-8e43-453a-8cdd-a3ebdfb3d5c2.json and https://artists.proofprofile.net/proofs/artist/0da7c1a4-8e43-453a-8cdd-a3ebdfb3d5c2.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 0x3d19bc79b5bcaf2a2c167f86510a9def7b5045791e0e36ccefaae19903519e0a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:10Z), 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/AEA2L2387505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f4bccfa4fe2c6ae4b6b4ae33d8c5efc6e3d9e2b92466e31963e237eb1af12c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/AEA2L2387507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec1ec813cf7b48112593af5b498de45f9fa78842e933a0fcafc6103751b2ccd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:22:43Z), 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/AEA2L2387508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6790b906b5f493efe9da4126d02163dbe49710d8bdf7967e3869a956b1fb8127. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AEA2L2387510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cea388017df38f0131a273589219924385857377fa3f7fd2c02b31b9a53df2d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/AEA2L2387512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16ce5cfc087a903aac0a7890d5b13296c7811ac1213eb31c2715598c4efff57. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:30:23Z), 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/AEA2L2387513.