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 0x46d0106bb10a3fd87fca3035e186df7591acab8e9dd6eecc8508102657d7cca9. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8e7a43d-b7e0-4ce7-ace9-8ca90930f319.json and https://artists.proofprofile.net/proofs/artist/f8e7a43d-b7e0-4ce7-ace9-8ca90930f319.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 0x4accc869bb68f15bea66772af6a39a0ae7a03db33df9871b99846d771a316c41. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ62542234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c90e8d5ae79a42029b888092ab8f254c089f15c75e01689617afbe3a0cd089. 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/QZDA52515637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86e3dbe5ce85ef9d899609ac02c6e5434dafcb5a0448d1e0dd13391eeb217db. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:56:24Z), 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/QZDA82581123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7ab0bd6e0200f3e1a997067f4ba9c1e8ef7c3c2712586f239323aeba7909f7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:59:04Z), 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/QZHN32546400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566dd9d3bd02092e303d8fcf26a8c2ae4585cc62946df6ef8016355600fd67dd. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:59:51Z), 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/QZHN62589347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a689a9184b4a64219cb2d355c5ef3fd7b6cf3eb236070aee692b1986c91fcf9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZNWW2504559.