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 0x7e618919c0f6ddab11aa14666df392406326cb722ab517f6f61bf670cbbacfb8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a072e78-2f26-4661-8799-5f68db1a82fc.json and https://artists.proofprofile.net/proofs/artist/2a072e78-2f26-4661-8799-5f68db1a82fc.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 0x0b0d165967823451ab9b98911a099494a9710f7016a8778b8a8b27332fe62b8b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM42K1965664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df19e7bcd4c972d30748a53521bfaa4603a54493ad9a1795160715c197347d5. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QM42K2043563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f845a99a3ce116c72c1d28f5ee0aa30423720e780416d69fb67babee7505d7a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNB1986435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a315a629ce5004ffd5f7b60bd9f45077252deab8c796df8eddf9a2b2a624895. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB1986659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ee2cc4911cda15265dae0016fbda9bd9d63eb1fa66f51580804f3154cec840. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:05Z), 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/QZES72060326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278b472323cc77c5f9d050d5d897964567e5a533889bf58c84995b92a52afa5c. 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/QZAKB2150117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65817aca2a365935bd66cee3c9704ddc8197663a47941ad58d4c4b4c5bba537. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QMEU32401547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc7730438327e79f855b9e758a618baa2b8812a3ad40d51e897bf82789a4b9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:35:35Z), 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/FR9W12406161.