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 0x47174075bf7c776a7e65b1f62bc64170afc58a0c8de7f65205500b77041310e4. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3abe6629-dbe4-4432-87ff-a3746d4b9aaf.json and https://artists.proofprofile.net/proofs/artist/3abe6629-dbe4-4432-87ff-a3746d4b9aaf.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 0x72515ae16ab65a35614bbab61b93f889aa40dcecd5cb169b25f8b7373e3d52c8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:49:10Z), 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/TR0792100556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920fa21dfd081656276f62dca091318eb8b18a2a16f81d277229b83aa281675f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:58:26Z), 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/TR2610900498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a79274755d92bc33d43b56da88419b6769fed7f656bd99ba1a85679d5c9730. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TR2610600121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5787c6ef6e86ba3a0c2f6d1c4335d2f396a0f7757276a10250c98364317d3836. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TR2610800453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d346c105b4fc0ada7db8d296a0a5ce70e4e9d6584127bd95a7c8741f0b7b7b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:47Z), 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/TR2610900483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1588e7aa368197cc0dff9f5d2298f30f24704ee2e5c239bc8b8512533e40dee9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TR0490600177.