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 0xcb2d60f5a93bf4d2d6a4a30b44b2964a98ce9b72764e49a19661342405ad6e77. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a51ce27-62a0-4ece-acdc-c7f2121571ee.json and https://artists.proofprofile.net/proofs/artist/8a51ce27-62a0-4ece-acdc-c7f2121571ee.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 0x62e1b8c9cd759eba7d2ea5e3b931949ed7cee7ab04cfeba36da40d2ba9cb62fd. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNWT2406996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369b0d9fa363812a9e41ba99ae506bfe2f13dae5080a1aa66686d19b7c823cb2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWT2476760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe97b5c8232fa09e5a00f419a7d2f495886d73d3af1f56d5687734b8d327b975. 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/QZNWW2444874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12507187cf9e31fc6268c17f50893ba5553fb0c717d91ea18c9b7134a1a0fc4b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:39:44Z), 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/QZTAZ2498535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d980c709545994feeab2f5be28ee1ddf055058f2a48584e4b7ba0594d155325. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:37:49Z), 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/QZWFM2492983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76625d6804a90abc99bd178752281382c9412265ec88cf978825b0783b8b2942. 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/QZZ7P2479130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab96660df6df93c0480ba3fbd291aa29f94620655cf4608321e6aa81982f6ab. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:54:47Z), 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/QZFZ22544038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0025923eab889085b46b8283c6e34cc2528b739258ed57e363a7d0147e72c61d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZDA42559585.