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 0xf25ed0d8863e2af3db36879069b9b539cb5fc7fd1779976027077658a9d740f9. 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/f777ce29-70f0-42f2-9890-6ee367fdfe73.json and https://artists.proofprofile.net/proofs/artist/f777ce29-70f0-42f2-9890-6ee367fdfe73.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 0x71cfaa047ac68ed16070905b2e692d31ecc81fc095c906919cb5a9232e80d1a8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6P42456184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07111c5d4c2507e96f69b29a1e8a413473dbb9700cd46570c527bf7250d826d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QM6P42456188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c4d97330df5d574ce06866b01a67b36af358689e2e8c6422ff0fcdf5d08567. 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/QM6P42456189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160e462dd3377f5ee5a44070e2fd8c0a1cb76fe04b5db005faf1390e6254d47c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:36:46Z), 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/QM6P42456193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9672687281ab26af07b98dd1ab1daa2d12ce285c2c1cbcb488e8decc0fec1b11. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:33:39Z), 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/QM6P42456207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1861be27325b5e8f1c4235280aa13f1a9bd390b4b96f88741d82b9bbea1a372d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6P42456243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca54fade5afa012de885b274e0087aa0456259b88ccdb9c14e673c323d60c7c. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QM6P42456244.