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 0x5f913f5ab5920976a8dcdd738954acc6ff5968ced89808abe9f1ccd36d118c6b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5725ef19-04a1-4463-b29c-8161a84dc422.json and https://artists.proofprofile.net/proofs/artist/5725ef19-04a1-4463-b29c-8161a84dc422.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 0xab582b17d2dee923bde81604e588eec05594490887418f8350066c142c3afd78. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPY252100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5cbbdaa08ba959afd108786c6456cbe1cbda622cc77ad8ff6d547797d4672d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/JPY252100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc56d5887b1a9e599977c578767bd1e546d9cbaf9b8441bdf62283dd6f58413. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:44Z), 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/JPY252300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabfc81490594b21e15db9d93e881b1686d0fa370c64c9017b692e239746d970. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPY252300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e012cb5647bc9078d151afbb1dd9995ba8cc0862029495ff280233c5d3c5cdb. 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/JPY252300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5371482b13daeac35b8bbccc9078df1cce87a3883d7b512dcefca25ae34e5787. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPY252300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de698118435ff3bb17cab06a0f68b7d74484fcc89565c85d57c6babb20f5df8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPY252300213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5cbbdaa08ba959afd108786c6456cbe1cbda622cc77ad8ff6d547797d4672d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPY252100073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc9e365ea00d05d3080e7fa6248b2e29f5aa2ccf41e79632c81632f4ddb9306. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPY252500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7d3ca438e87cad10a8443f6d0f6d8974ac081139687ba2471a5823dcf33e98. 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/JPY252500011.