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 0x14b02703a3ded7f9141661eff26a915925d8c5724b9a0f6777b8d3a5b5e2715d. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/037ec76d-f937-4d0c-8d5f-84ebccef8e72.json and https://artists.proofprofile.net/proofs/artist/037ec76d-f937-4d0c-8d5f-84ebccef8e72.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 0x112b4083cc5ce90add3aaa7e294415fac271b0600d1736d1013c8ae2803f9432. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:46Z), 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/ITJRU2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9539675f1c1a2845307e4157f5a9495895fcf077e6ffcc0560e813daa1fefb07. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DETQ72400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353026ef9c946edb5b1c4b7d4eb0f54ac7f3fba9c6a3711d9503195e7b666610. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:23Z), 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/DETQ72400352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9539675f1c1a2845307e4157f5a9495895fcf077e6ffcc0560e813daa1fefb07. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DETQ72400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4700e6128c97e77fe50bb22620f72d41eaaaebb11e030a3ae8ee04ec9310f1e3. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/DETQ72500389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dc0823505459386ac6d5d6820caf321259912d00eee9b3f66b2a57cd26bdbc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DETQ72500388.