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 0x7b2206d759595fa67476ef0162afe2678f3475fae668c5b9021eb448f11afbfc. 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/acfd28c7-b6ec-439f-8ec0-806881c8ef13.json and https://artists.proofprofile.net/proofs/artist/acfd28c7-b6ec-439f-8ec0-806881c8ef13.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 0xeae5f09512a1c9d34adbaa2e664a46fbf5ff7a4b13cf59dd7cf08c4e4f573f6c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:02:19Z), 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/CH6542508592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a4ec8ed5c9309eaf8bb768fb1d0011aad0fc00f84bde0dafb2f0c116316897. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CH6542508594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9972045f0b845da3e06c9bf0b24ebd67480fadabbcd6c0dcb9bfa36816a3766. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:50:12Z), 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/CH6542508595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf840770ced56c8dc0dc0b0fd302454a24c4105aac7796e5221a4fdf8121e77ca. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/CH6542508596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819c3d3b7ff8328fd50ca3f35d54530310aefed56c289c3cf58e6f513f3bd449. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:53:33Z), 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/CH6542522438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9ed47e44f69b627b4565804689fb4f78b14501eb00774f28c3331fc661e154. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542522439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4a1223815b877c7d4d2a3bf6d134b0bdb1ec1b868c098006c105d45bfb9707. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH6542522440.