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 0x5d23876967aab9c89287ceacf2a77ad7343d2a7b076032618f8c4514d3202adb. 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/84461c42-0ef6-461e-985d-9db3274a6b1a.json and https://artists.proofprofile.net/proofs/artist/84461c42-0ef6-461e-985d-9db3274a6b1a.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 0xbafc8e1f6d2fbfad4f5e23ed53f6227ec14f562082fb128d2ae65db08ecda5eb. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/JPB601502294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa778103ffdad19c7829ad0a0e2f8f2e54cf98be95e21080c12a91a1faea75eb1. 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/JPB601502296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca4b6679d8aaf17cc254300ca8ce273f71ca8483e53cce93a90342a302f46b0. 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/JPB601502297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9e21c6fa204992b26cfcbf86d3fbc04a978f40ce6c907cbc256d2b61a2ec8e. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/JPB601502299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ae4312cda52508e5afa1fc136b73076c74aa018f7bc1498ab1fa460530b22. 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/KRA301900250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c52605a1a09aa55b99a0026061ab02be899bde231611790945a97f2bad5e73. 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/KRA301900252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b5adfe749b8b7c377af39a2eafd08aacb5384e99f735708ccc925624ec9c60. 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/KRA301900253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43244f75c00dc1c82d6ea1376ec560d7b79231177354ced33a5eb5751b668764. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/KRA301900254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b102ba28d6898dcb5a40c41f13865a6b362f2fb40106ab223d9f948dc35b3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/KRA302100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9da16c305dab5ed2e7c0742b31ede3c21fc5f98454c58d33463403b9d1e6be9. 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/KRA302100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ff66c900c3405aa4cd769c74e11ef16e17fbed446b080b73f37b56f29f2c88. 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/JPB602200554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf392b0d1e749f93bf3abd78944b94b74644fe1b052ffa495693d84e0263bd41. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPB602200556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8a8e424a075626d53858c0c108e7e94d8ce8be05e00fd760542a2428fed7c. 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/JPB602200557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f2f1bc103e9322f5d1635be711eb2dd95192bb0609dacf2ab701ea8d640f79. 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/JPB602200558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9540a4b1e6d22a94008cb64942f7f8f7fd2a1c9abede714c7fbfef9cd6cc424a. 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/JPB602200559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da52d5d960e48a05029d8eb485afa5fea37942782ffcd40f821055efb54cb08. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPB602200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913eae02e9afbe174c39f2979e7dff9d0a1decdd4bd2c7241433538e9ba2f219. 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/JPB602200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53f48c7613ba9abaefa1e9b3c3e492c695cdbb655ffa71fba8dcd324af729b2. 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/JPB602302465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536da55412ed269d99ee8152f75c8681d0ba7c2e6c936d67fa33dd3484c3eccf. 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/KRMIM2360941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2596b8cf8a7ab375aa999bb5dcafe6207c374dfa6e109c66296f34bfaca0b1e8. 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/KRA302300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12013330ece1c56549d2684e686242f8f7d7615113e3864c7506ac7578482793. 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/KRA302300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf538d0e36ffd7fd2126cecbc3be0c466b9d9e392f6598b00a95cda747a93ae4d. 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/KRA302300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288f8f0a5435302763546c5c9f471ce73949860e19065d0cfb171220b871d058. 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/KRA302300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa3d3c53d488f68cbbbb0ea034508fe74f1e32f2b82ac2252bfd030e9a49500. 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/KRA302200273.