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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34521a60106b19321a86e6e56fda1073bc860fe79fa7f3867a7b16b2a0c56c20. 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/7272b76f-fc99-4ae1-b07a-242a33be53de.json and https://artists.proofprofile.net/proofs/artist/7272b76f-fc99-4ae1-b07a-242a33be53de.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94633d723fae97c2e09bb2dba12a3612bb9dd0d31c917706d4b15442243bb94e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAEP2044799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f665fe384fd2c6bc014f9267cf939f45291eb3e00bab5d89a04942f449e740d. 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/DETM41610695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6428b9530aa961438b159565be87431b41651daaf417309a0ec2c33364ff29fa. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DETM41610708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f823284ca7f5737756dab5dc98a4472b34bf5221116796f33d58b565389f6a4. 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/DETM41610710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0045e43017143ceaae878faed35a876a8a8b2b9e1fcbc0bef08cb5f94f04b8eb. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DETM41610773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08b42ab515c79f1a08997c7d9c60c6df512cb4271e15f36f44781f23ec1eb5c. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAFR2121961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407d29e4ba30930eb00d7d3ae6cff6c64e7b7be4a2004b2d3dffde8ec68b02c2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAFR2180350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b805311c4cd6dd241aa6a8506ac0d59d617da5c5711ff7a97d2c5252067624. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAFS2111544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c07ef01345ac4d6bf4dd30101e9e869f1c5d431b030dd81cbfcc6d5d1b1092. 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/TCAGA2217375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b7e667ec49580e74bd6fed65e613ad2ad9a672beee99d7f55f47adfc94bd6d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCAGC2242622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514eb042ea2d6f50cdfe7625b967768c9a88e01eb78142067ccc4509310ed126. 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/TCAGE2268436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98383b799bf474602c46385915b0b7533073c8ce1ebb11d9d839592336307931. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/DEQ022291303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3cf2ec562cdfc5f5b599d79758e584690f736eefcac27d43d2f55ad0469452. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEQ022275582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22af1aea289f8b09e5ad0a20edc6d4532203e7e8c19e153a9e9ffc0d1af95f9. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DEQ022276086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf383a6ade0c9189135985e3dbef9bc746ed03ae9e1b96cc3f0140745a36b9a3. 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/DEQ022372052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d070b4f1dd44fcb11e7045d4d107978df524734b96141e51a20e0a37c533088. 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/DEQ022373176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5621b85cc42ad56bf1122d0485d40d989edb5420aece9d0959e9c071ab039. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/USZXT2351763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb649b6cc49483b7cbdc330155a782ed430a48fcfa6e3e4e4bf5392dac2900611. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR10S2422560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42939350ee40c5e5798fdc90ab6859f6e25c190404551a0216f5e5167d894b03. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR2X42442205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c503b76173405127e9d7b26af3604a239c240a2088dec079c3258b241c95d. 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/FR59R2456616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963080a1566e506aee6af5bdb23ffda821d934018f3252963b664a8f8cf13577. 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/FR59R2456617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b5f12b63148469598fe5f129ea017e1506f22c1dddc9d7db336e8088a68b9c. 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/FRX452409045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c5effef8b92e5ddeb3fb63667654481841a040e04ccee55d16a95be52c406. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRX872426551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb2300d8a92d4d3b43bb3d785ca25430508a588b4ec0b0638c9d531771ef003. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FR96X2553763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7640afb8104fc34d53adb4679262e9bf75710d0d665cc417f94fdf5a99edd64. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FR96X2553766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c65967c661d51f4183305c0d259b96a5a62e3b81aaa07667852859f8849635. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FR96X2553767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ad28d127a03ce3f227b3a7374d14b38ccf62c8fcce6a6679b1204197cce4e5. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DGA0R2443642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e45c1ec5adb3a9e1cac70cf9692fc5c37c8d1dc4a427c3dfa30c3ac3464b3e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DGA092495112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c5effef8b92e5ddeb3fb63667654481841a040e04ccee55d16a95be52c406. 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/FRX872426551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c503b76173405127e9d7b26af3604a239c240a2088dec079c3258b241c95d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FR59R2456616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb649b6cc49483b7cbdc330155a782ed430a48fcfa6e3e4e4bf5392dac2900611. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR10S2422560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c09a69837bbbbac25130719682d597ab22ef6c2f154a10e29aaf639ee1c56a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH7812407683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fc849b1879f52971023c2bd2d3e5e5da8fb49cf4c0fff8a1d9a16977cd7fc1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEYA12400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99595d6d856a949ea4d821e929edefebe7107dfde6802b91544d77821d949564. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM72117712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec96036ec1130847ccf21054eec02b3fc76300cf150818e3dea2e34f7399f336. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEUJ92000049.