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 0x78435c97551cf9934b607aaefda53f8bf446502d70e4ab3f114ece404b70cac1. 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/51e6a72c-ff92-42f3-8104-e3aee9e2ebfa.json and https://artists.proofprofile.net/proofs/artist/51e6a72c-ff92-42f3-8104-e3aee9e2ebfa.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 0x53a23442f1c9bc6c923118ae91e573fa544c071b971c6ba19d7f0263f30ae582. 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/DELJ82011316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcf9863b6ec23aeb9185222444f9a341345984005a72dabc06e90a37073f43b. 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/DELJ82011317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926c3ee7089b5835b701be332df28d0fe1bbb2db8154a1f2d856372262a6e630. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DELJ82011318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3870451471cd3505a3568ddf5fab27ea3392ce5d7d40659755800013ed07d11b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DELJ82011320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfb786780c98896a452d3943100a61dd6244ccc8b9db168d32b9ade28060ecb. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DELJ82017060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8277f1cfa1d7dd557286ac31a4bab85c35277e9fad0d1b42129c5f735209c5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DELJ82017061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ceefa70014be90e9b5f41df1ad286acaae1c09dbe52e3f0aea89a0c2e94a24. 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/DELJ82017062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab42efc4b3fdc34ee15cf5d9d6988c5d25c2f62acd9f89a448cfab860db6255. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DELJ82017064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa49a191cd34d0d34cbc693ef2bb9037be5b461e75d78ec7ce48cd53215f07f. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/DELJ82017067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453061b1a4c934e457a9e3ffa8b06197fe6fb09f5af4ef830b8d0c06dd251f33. 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/DELJ82017068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdf17384e8ca46f917eb1860f2c1c814772ac57c05538621856610a5e57ec1a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DELJ82017071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f26f810621898d2ddb0bdc728a3a419f3854be324dc537d85eb2776ed302b8. 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/DELJ82017082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f4a95a8bce53276daee70490882d66334f2f3fb8a65a1a388cc324539f5c5. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/DELJ82033056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eac4e9b9be96aa4c658b565be50fd02ff23bbf58e3590e95879a4ddc7b17a1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DELJ82033057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd513c0dbb582f1885d080f419dc9331b1684780b79c728ba62020a4b2e3dd26f. 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/DELJ82033062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84fa0bf27f9c96c65b1cf7333af6af847778118feebfd990bf21b190d8a8252. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DELJ82033065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38fde38e1171befec671bbdd47abff3f7ac187e9e04d97570894d812b6aa985. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), 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/DELJ82033067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294d98475e689ff8febadcb5894ac9ee153f111aad95fff38f0406eb7b4089dd. 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/DEZC62029631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55745b048fb7a21b91ee050c065b29c024a38d5c3aa1661a6c9fed9440c666c1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62029633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cb083547f82d2fb0ecb8ef60d3e6b8fb719536c72a7824e7ba7dd7ed4732bf. 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/DEZC62197104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348e1207caadd36671ed1e43a36d4726e72cea6c07f1cae5f17155440864996c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEZC62197106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb859baeec2fd351fa743d89ecaaaf281ac7c070a3192f3c97e59ca7a454bd0. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEZC62105480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe8cae235a12a89cd54145d9bce452b67cee9300202f893a65d940f40b2f857. 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/DEZC62134788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb73b28301cfd25cab2fa820123dcbeff13724fe89026b42ddf7903972ef0dd6. 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/DEZC62258674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11313b1d5562c2760d16cc57ae25f834aaad6331a349139e4233bd2a6ee1eeb7. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/DEZC62262253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdf35a9ec3bb77be9db51a407e844371973260743c556b097821909eceacd8b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/DEZC62276480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5281d626cc1bffee0dfc513aee549ba4bbd3d5fb558cad5deb9f5e3671ed152. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/DEZC62342878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0491d265f9a79ca333ad4af50efef903002f34d595b4da563a87dc328184ff3. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/CH7812367972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff19a0cb26509e964da1de06b006c22228c1dc99220bb1a4939bc1a6425471a4. 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/CH7812402204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164468a14f633dece111852ea1fb0b2742412d428ef3f5f0f7022d9af9ec079d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CH7812412245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323ee813775ba76937a513fd6b7df34fde19a32f610b4e94344d6527a4f576d8. 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/CH7812423458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56956db165973d1850f9bf1bd4a0e5d55372c5f711dfe398408486decaaff04a. 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/CH7812528627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf90460658534eb633024474e8456fbfdd85589ed2d628477fada01d48ad1d30. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH7812412133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7413e50a97ccf07c1351bb04ffcb310cf0f28a0a1f0dcf23b4cb3711d036b043. 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/CH7812529663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8703df6a524ac5634e7b91c8075d02d98916a52846a4a318bfbcdc0330b74659. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH7812540084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557dd345bd71fbc67177b09e559f232a6c44f9bb3cd9a1a4f72bbfa490f89258. 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/CH7812546704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e719bf4746519551b43851087c91c4077e6a548e22f0b7c692c58fa7bf9d17b. 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/CH7812548499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68637e1292a904ac2998acbe0b5e5f3a58016d7715f87f70dd35d9fe9d4dd847. 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/QZAMM1909977.