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 0xd86f6178d92a712399275ff4ee23112352b0c3f54db9bd8ef5b4e260068161d7. 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/a2423a6d-6335-4012-b0e0-bad34ff09f81.json and https://artists.proofprofile.net/proofs/artist/a2423a6d-6335-4012-b0e0-bad34ff09f81.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 0x231a224f96379eea8a8a7512d47b0c6f384f5f1790812e92172c8964e9df234d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLPM11403252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff31bfc9b57707fd27663755abe76722b872771df580b72cbc8943ea9a4701a4. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/NLPM11403253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6909d1ddeb8bc1b2344d1490960d2706b57e54af53647d41a5d75bc02ecbc06. 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/NLPM11403256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcaa253934245f321f20d35946235ea1cdd24ed71b5aa20fe8bb324b7770c94. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLPM11403258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd941e0254ea91c137671dff22ac5acfc32e938bb2003f91473ec3d47b90ec3b6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLPM11722906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfece96d0d56c68e44fa39c397f81c48f0a29e917cec66de2596f3c18010b0357. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/NLPM11722907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e8f4f6bd5fa0d5953d7954a9b70240c29f618c0f140a9ea580edf15d0a78a0. 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/NLPM11722909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b611710b1d7923769ebb01686bf5c04fd3a951645ed52a34d454520afb5508. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:26:58Z), 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/NLPM11722911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75eb41a264625f6e8816f1e3961b2e0e9e00ad24b2c50b5479ca311f45e8cf1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NLPM11722912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5d619a125e790c1cff34d7d5e3cdfbe9a2b821f233a9ddd6891b409b2cd386. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLPM11722914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f735bd5f1a5054919fe1f65aae3a7b505cccd643ccb0eea91cef04dec16fb95. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLPM11722915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09af8901b8e864df2c0c3755898ce2afb3d9441210cb53daf5354c457519ceb. 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/NLPM11722916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87851ab0276627bb376179e5b9626a36117fb4f40717d3f187ab0ea441352fcc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542430370.