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 0x225e5d0d1fa7902bedbb8c9e5889416207723fb59c841fddec45e56fdb484c22. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a77e7b4e-9670-4edc-9ac7-82e7ae642075.json and https://artists.proofprofile.net/proofs/artist/a77e7b4e-9670-4edc-9ac7-82e7ae642075.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 0xd87cdd1d702d8ab150ecb79b3a6194c329b1ef4692042af347ac0a864f463386. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:22:51Z), 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/TCAIG2402600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe625cfcc826b035ee2f7a4035d4d1cb612ac478721f56e1116b89ead7f9afcdd. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:42:41Z), 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/TCAIW2482342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae2fde9804f5a39115feab5a2adf52fea091fdf6d84079ec027bef2ac27f38b. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCAIX2470343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a3bb4e06ce209f3c4c7c4b54bcc2551cda11e27798a36d1b33419c9a04c1ae. 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/TCAJL2510752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f58bb8a1c1b55640ab782ff4984fd7959a1433794fc8a556af0b550fec6638. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJL2510765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcc9e2a8eb2018a2075a7867215fdb317b8312d00f99a1060fd931d3fdc952c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJM2510778.