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 0xbec3418d5a6fe35fd6755c0df26cf8c22650b97ea65e89dad9e85f661f2d23fb. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f9af06b-9807-4df8-8d5c-624eb2c6b7d5.json and https://artists.proofprofile.net/proofs/artist/9f9af06b-9807-4df8-8d5c-624eb2c6b7d5.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 0x3a5d2107fc05b4909d654d83cb6ee1de1db7c8e09283832b4b4be80107603101. 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/USCGJ2238226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea7a5edf650d6094726c91270ef19ac1bb0f69f959935b9755754399703c3e9. 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/USCGJ2238227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf11a84fdba502100cacfea7b57ac925d7690a280c5e995a23014ba7ecd4a5f3. 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/USCGJ2238228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b63fbb11af49555914b4873c10618eaac83e54f0096da71eb99fb50bd28aaa0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USCGJ2238229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b909d0fe44f96049bc1835dee1c00093e6b24b76c965bd1e1d49974233606b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:52:49Z), 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/USCGJ2238230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0473679ad8f92cef3388ae44db8a26a1fd058d15ae5ad549206d5810024e2cf1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USHM92286150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ff37c2904b7da9e148dd3b2c6e7f1024572b7003551ad60030e87ef272c12f. 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/USHM92286152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbf76ca6d471d6d380982ea8f5fe7eac620459e25c6048580e2063b8715daa5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM92286135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e11eb50864b476531143f8801bb59c68b9e8f9541579192a71adcec3fc4640c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:06:39Z), 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/USHM92286136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd61a6bad14007e3d95f988d93bd20894c23f62f10f9dc83c52055c9efc5fc3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:02Z), 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/USMH92365931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a34a1d7ca8b9289511ca39b8e43b21ae0d035b75e47f0627858c11eff5a0fc4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USMH92365932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c777b159407ef6943184412223e497b99b57c862f576b2a73949d15ed195b1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USMH92365933.