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 0xfa123a3d82453cf18cfc77dfff327bbe33bf18065bf87f94435b85c1fbc43ea9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76925e69-a540-49ff-b983-d580f36e1c08.json and https://artists.proofprofile.net/proofs/artist/76925e69-a540-49ff-b983-d580f36e1c08.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 0x5a16ab479c0e04e04e491e4f20bee06963b820860055e6c4ba6f0f5b62187536. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6K2251477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f8ca2e82db225088c3479dd8b7bfb716661ff8e5bba9302cea4f0044ef09a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWV2259713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5390c505749b0036b730b7f93760c807682f25d24fee09dc1614f54f8f7ac4da. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA62389951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b48d13704fd90bab4077d0cae6d0677f543e5f2beb072fd06bad5ac033a1ac3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMDA62411667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5017801866c0ccf63afa3116e410f669146c50dbd7a6eb52faefd5ba7dd5e6da. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:09:45Z), 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/QMFME2449845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7043afba9db2e426a22630c25d3599407980ffba4b9f675a51ca373d79c1ab56. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM4TW2556182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4214454d5a1475b0ef734e0910d4db8a7416e3d129d27c5521da6b1436385d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:17:18Z), 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/QMDA62510065.