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 0x6ffeb039fe98bc7f39f82c022d3ccd9f8355913c684cd872e93e8326eaae8eda. 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/4d5bf1c6-f653-451e-8499-a61b7388d587.json and https://artists.proofprofile.net/proofs/artist/4d5bf1c6-f653-451e-8499-a61b7388d587.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 0x2f8dd0cd4b8017eb0f50e8a7a5b52d44f0049de222d819ea292315918cddc732. 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/QZFYZ1932347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfca1910de9f84c70e31232944fcfa0f0b6bdb68bd47308a2c24977e79a4a6a. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZFYZ1932348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35caede8f143f3470e7cf28c8424c5fdfae046dc1c8611a32ca6982b51186201. 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/QZFYZ1932349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe790e1f70f50004d0d5fd09ef09b9ed936de327905cd410c46f3619daab569. 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/QZFYZ1932351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbafa43c46f6ff168ed39eb69558b845a505c7533540bbd4c493f8e4773f995f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QM24S1926965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133e02210190ea8306a81a29542f9c1d897a9d64148afcca97050e10a5a38a5f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMR6U2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd2834e1703c1a1e4d293b5a0e3ea9e5487282bcd25ccd212f0968e3639dad6. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QMR6U2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef159adabbcd133314c0c141c0c8e66def0a648132997c320962ccbad62c494. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QMR6U2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20574a19a39e3fbb5b47a984265303ca21c11106367f3bba1dac0f825b2d6448. 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/QMR6U2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c3c8ffbb18a075b0eb6f09526880a4440062115238bffb0abb1b32d567d3c2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMR6U2100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56a7cb8617ed44ffe6c3b0828c9803c21c024c98af7776767189ff06ddd4949. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMR6U2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a87ae9b962ffde2ec6d04391b3a76e312dba236943fd4cf691889cccbda34f1. 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/QMR6U2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a87ae9b962ffde2ec6d04391b3a76e312dba236943fd4cf691889cccbda34f1. 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/QMR6U2100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c3c8ffbb18a075b0eb6f09526880a4440062115238bffb0abb1b32d567d3c2. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMR6U2100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb707f04e757a9c20e88151543de2465bd28e9b8af4f81e0540c07baf0ff54b72. 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/QMR6U2100082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191ef76100da5ef98abc309bc559aabcb7fa39384be7e1c6144cc79d38d3989b. 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/QMR6U2100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa096b38dabfc2f29ee4da273bbcc88243c33318fab799d959e22b783ab8cecff. 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/QMR6U2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed384d8d408434b14e31e206d05059ad3b514f3daadefd5c0b3c39e6d210132. 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/QMR6U2100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed70e56d195f0fa590f2b43683655a63863b97f5fea5df4007cb6aa375571902. 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/QMR6U2100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8270308dbdcbab8aff45928f2796db5af84e7ccc5207b1bfcec27b9b71bff2ac. 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/QMR6U2100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7411ae68072230f1870ee3cf912887b14cd525e3f3655bbc2c627b236b57dd. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QMR6U2100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56a7cb8617ed44ffe6c3b0828c9803c21c024c98af7776767189ff06ddd4949. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QMR6U2100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098faa4c88ff213ae1cd5d13a4e62b790c593216e6406c9ce1a947a89967934. 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/QMR6U2100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801fb9b716b4827cc8123f90c3391dbe470082c170c8cf082ec2c0c674376fa3. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QMR6U2100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad74a4803c871f3bb64a517c5e4c6d518a90cdd48bf7f05f4885cfc2bb59a91. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NL1LE2102467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5358f034c5985f75f81b5e3435bf44750654cecec6f0d825e00450e655c00221. 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/QMR6U2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a291ebfc33e25ea3557699a5b141323086fccb8d0631a6e12ec8afa522684fe. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QMR6U2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee923f92f8718ad20bf31638e0014a4ab64cbc6270d2f531d42f82d67d3fabb. 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/QMR6U2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca84f5431cc325480f78dbac56c9caea9fba86b4783398b61d26ee09573f934. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QMR6U2200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a291ebfc33e25ea3557699a5b141323086fccb8d0631a6e12ec8afa522684fe. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QMR6U2200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46f752a3911618cce93c24404b400872924d0a6b17f80c790335ad5ecb296d0. 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/QMR6U2200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cbf94052facba03eb020b6f5b290fa1a870fa4c8a56b3cef5ef505a2ca797f. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QMR6U2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee923f92f8718ad20bf31638e0014a4ab64cbc6270d2f531d42f82d67d3fabb. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QMR6U2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342be136225c035bb2ed9170b752fd1a730bab0d975c8bf9f9d7a47bb77f83b0. 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/QMR6U2200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cbf94052facba03eb020b6f5b290fa1a870fa4c8a56b3cef5ef505a2ca797f. 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/QMR6U2200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee923f92f8718ad20bf31638e0014a4ab64cbc6270d2f531d42f82d67d3fabb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QMR6U2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abd7bb0e082d6c00382f14980728401fd7ba1766a1dac1975e09b6ebcf93b19. 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/QMR6U2500048.