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 0x92d0803d617debeca03fe8b242dabf0f86d68ba296c71d97d1c8e3b839104dae. 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/97e95eb7-d182-4a04-8813-294f3eb1b5ec.json and https://artists.proofprofile.net/proofs/artist/97e95eb7-d182-4a04-8813-294f3eb1b5ec.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 0x15728d23a285c2ef5ed15d5a80aefcd802a6ba88dea804e79797cc71a120e7f2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USHM21557743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fe4816b9b82966617030f1894648988f36de097745408982f0f63a0428a73f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USHM21557744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406ca260326f2f4afd745567457439ae03ec137d83a2f40382086ba3aa9220be. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USHM21557745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf971d7785ffc5f104342eb50621d2ac85f86bba7bce003411f30d5388ed78503. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM21557747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb85af4366dcc9ffefd1f7404ab0c9423e997b1832ff15c299ee0ef7578c4afc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM21557748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f840e30e1a9f525778d1390bc3e9a846e4f1b2504fc1442caa6d72938bc5d8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM21557749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211731e0bf35f40c4c0885b3f8cf0d101efba359a5de19d09cfbe1d4f31a293f. 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/USHM21557750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f7b4b9d0730111359a96e2426a0905812b88113fd4c1803ad58478a93d2883. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM21557752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865a3d23ea190fdc09c998fa1fa1dbec24793aab34f8b10fa9c8b24866ab194b. 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/USHM21557753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c34c9216ee7709412b4eaf1d89dea2c078c76680ebafffee853be43be04ae1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM21557754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65665b2b1dc3039c89c9cb2fae618892dd0a4b2fecc5eb27e0d264ab9a6ade4b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM21558347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f800e4034534e096187f37a783d446236d46b5f7e8a56eecb77a86d1bf95d90. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM21558348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ee3df474ad5f137eaf7b345e033744ea1678f77f10bd382d35ad4e24c6abc5. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USHM21558349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1258630dd5dfbe57f65f9268e8e20d4ac080c1dc2f90a272f4533275c4f344c6. 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/USHM21558350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8f6a83c2a986ab4fa6cd248abf8978a70020f68609a72adff9893c7284d340. 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/USHM21558351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6648199a39b79155554ae30d14f98235d258f804b8cc71f5221d5fed569f62. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM21558352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f44c1bbfbea3ece221ba7b94766caee3bd687b1198f75fd4296d3039e19be. 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/USHM21558353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ac5c52fe1441636dad33a06beceabd14348a4c5466e1d8d587f7b7fd9dbcd7. 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/USHM21558354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921a4a1a400faf0f0434676f750b7873d7c51ea83cf99b5a3e6b599bcea70327. 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/USHM21558356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6776c93957d6742575d1ed39405cc33704cdb1501c825fdc0c740c81533862. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USL4Q1888915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba4b470eefcdacd79f000749f9f479d4d38ad4dfe4144dd3a979606b8cc7ff8. 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/USL4Q1888917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49b61f55b813d746aa10ba7350193a97cdbe738f4a5a73b40107a952d659542. 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/USL4Q1888918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad5002cf92fa214c43fbdbd484360ee3b1b4ee2dd8d31e343cac9b7e012c4f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4Q1888921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff24a2334b59fd7a90327025fb95e97efb41e4ecefdef8647f7e9d5704f85308. 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/USL4Q1888922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00337e5fe20a2b55c8e1a9f5063d1af7aacaace56d68d5b2a66f2e8d361c0f40. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USL4Q1888925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bccdd3ec58244f2ea824d18be57488ea24ccbf2e83fdd9b25d58b9046bf551e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USX9P2026453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f92813af8d7c4e31dda7eb69cdad244acfd9d5bf27ac50d57f5e21ecfa25d08. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USX9P2026454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe91b4b0d0a2038d5b0cdf0569f27988deb0ce3f6898154d9c41f63756713159. 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/USX9P2026455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6f84fc868bd1db5ee027024c4827e599d68fc1b3b7301fe3f55668ec3a0ddf. 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/USX9P2026456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632dbc34677540b7b4f79d3717c7d1428cb2c183ec17aca2c70d3556c6f575aa. 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/USX9P2026458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2810aa3dbfa75e028d0d16d97b00c5ffe67668ede2f447ac658e5adb2fef12. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USX9P2026459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2093d4ce5e11ae574b179f9ef7a192bc66713c46a4111c608a1f965574f61a79. 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/USX9P2026460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc9a812acbb00c22bcfdce0b3791e91ea863cd4d2cd170b92e65de843d2ebe4. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USX9P2026461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8974b03de3f566160cd4a5599ba76ad23db531e5f86a70c37f9c2b000143ba. 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/USX9P2026463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036c46256540fdc1a2bd9ffcafac6cd701762f5fbfebefdb30591e42fd279edd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMAAK2354122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e086094f09ef9a1e19078f0e183e3d2064b1f0b3f67d1d57e0cb0f0845484c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QMAAK2354123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e4f3b919970e33fdda5541607a05b34fb527c286d02076d5c2c55d68a3d56f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QMAAK2354125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80340c12848bc85c85f36f01cf9a50265e7eac998f33998c322a8ddcd53f2971. 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/QMAAK2354126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d73e449256647346d216b92290f948eb1104eb1b1bdf6e2f75cb1f5c8c60c8d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QMAAK2354127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f69f321b5f4f4524868637030b9b96d55b48073da11989efb6b017a8227291f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QMAAK2354128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f2ace8b65d891fe5de2df9136405d392a2c3b9019812bf128699779a6e8836. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USY242479372.