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 0xceb9d01e73cc45c69d3e26979ba66c6e3cf7f6ccec12054b10fbac8e598e73fd. 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/b81113b5-f0cb-4568-9368-6f121a15e779.json and https://artists.proofprofile.net/proofs/artist/b81113b5-f0cb-4568-9368-6f121a15e779.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 0xa7640701f706bb4f2275cfe981cf39a5ec12710e203f98b47d4b863c11ba14b5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMPKX1663023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a73d2866cf32ab97cc73e9779f7940c6b6238f44b47d556e0e344e7f881270. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:09Z), 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/QMPKX1663029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a6b1316528bd3b2cf93dd15ffb499fc9b839cd7df003f35b059b639e7ee56c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QMPKX1663031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20216ea5d0d20f82f8ea27ff0db31568bcfc6e78e15de118fc3bce31f64ef7a2. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMPKX1663034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb66c41f68d070f09b01a3cf978da682a081a16f15a94ed078e1632c51cd49f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:13:02Z), 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/QMPKX1663037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e935dc252779c02fd8e00fe8c7a26c17152966db2d38ac2c84c6d580cc5fdbb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM2PV1544715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8615ebd76309c55e78cb0a3f519054c3bed5390a492af4f65dfacbce148a6cb0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QM2PV1544718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7934275fb117118bc4030e88257b6b13b5461b01d39c866bd11de69aee6ccc0. 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/QZNWZ2000001.