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 0x244fd6d6d8f9c7ad1d825aa68d6adcdc0b2fbf3e7a53a2b06e3cc2411358ebe4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c87c9ec8-2efd-4490-b9e4-ceccb33d16a9.json and https://artists.proofprofile.net/proofs/artist/c87c9ec8-2efd-4490-b9e4-ceccb33d16a9.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 0x6bcb938538cd5365da502c3d973a2ef5ebf0efabe4f5726c9927fb448ca7cb24. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFM2126782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbe09cb2bf13543d090d1c49dbe47d9a523cfe61ba2f1cbe27484043a1be3b4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR9W12122630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cc2e07082316f2bf1b24d96d677e0b714bda02bb8f7e1ba65a17d0c1d99adc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR9W12030659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e20307693c1f7b98a1f1f7864a3fb26bf756ad78cfe26542bd180b7dbbc1de. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FR9W12139922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd203733c62a69d50510702343fc3a1009bafed967e0b2d23326210ad78cf601c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FR9W12201939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb32106bc0f6ee63863c8b535b50ddd3eae9663259c47a325d3f782d47189bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9W12207483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82d82a420bd983e403f82c2309e5d88db714a7a9aff559bf57042c08ef0f6f4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAGI2247805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbad22f51632c22691fcac5f6d09c61c0324bcff51f17734a518d8f5c576f3eb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR9W12239015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a2467d1511faad4fa591ab50f13756d355bebd9a13eec1e71a4fc6acbd2a92. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FR9W12337016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60446538aa4e09b2c22974eb5c7d90375f5126bb61c094916a555f3d3856e683. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:08:03Z), 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/FR9W12348593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c89feadfb68d2fccfd91c07a2be5f07f73a39693902a296f42179f99fec5f72. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12456981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805c7e247ad0aceebd4d763b50d4377b7afdb175ca3343f5551da36fd3d414e7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12456975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c2efc272265056a35e9ebe95bcbe35fcdc707131c314a0f6616575c24ed0a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9W12456980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053989d3a16ba15790849b26a230916a8d6913923ceb1e305fd9baeebdf1a81e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/FR9W12456977.