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 0xa06c0e88b7f2658020a94c87b723474d2c78b3192ca1d3eada8f49ca12b91bc9. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8df9c83f-a9f8-476d-9e4c-01b89d5533b8.json and https://artists.proofprofile.net/proofs/artist/8df9c83f-a9f8-476d-9e4c-01b89d5533b8.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 0x363ceefe6390e05e68f1625748a7eb18132e4d5084ccea1e3a7b62de9e407c61. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXDFR2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2db40131b108668e73fc73f2d2487ad8ccfbf9754cdaf5e824503a19cada73. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:02:22Z), 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/BXTFA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9863114f77e18949f4f0e434f022574ad5c09eaff9b96ca66e567afb09fce11f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXTFA2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3edde0df937f2f04e84bac7a2ec47c4358659bbbbd5b8e4e34f03cbbc02a38c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXTFA2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea915081aa5aa4d9ee65530a3574d21c48d9b412dcfb7ef067a3f40f743530e2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCIW72200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77b70d299a53f6fcef5a8af7b38b79c3247691ac8875d9e44336d66d4df72ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXTFA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2792680468c1243fd1cc25691e2f48e7b54fffb430c82a6b2015172e41c77af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXTFA2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea915081aa5aa4d9ee65530a3574d21c48d9b412dcfb7ef067a3f40f743530e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCIW72200001.