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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42844d41b9e42d5c97814d85e127e72556eba5000c7ada0c6d12ff46370631b. 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/6724829f-684d-4eb8-af7f-5cf6c1ba2216.json and https://artists.proofprofile.net/proofs/artist/6724829f-684d-4eb8-af7f-5cf6c1ba2216.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32b9cc3a2b430877b7292df652cb089c4202c177d7837b59bdeee8878488906. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USV291477542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c92ac453460149637abb597dd622c612bc2da73ba08e3f909feace43f05ad9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF1435328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6376ed15dab637c69ba18b2102e77b059629e8d6244dfb61ef0655873d8abf86. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:41:49Z), 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/QM6DC1520262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904a5ed9de575cce8e9b82a6cdfc1626db0cfdb2793f9f5fb5a9ef0392183122. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6DC1520264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cf5a959d7388a92effa56130a7ea23c6ce78b37c336192e01cef92e9aad538. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM6DC1520811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe84ad78d36c689a537bf022975ed43c678bc791dacc843caf5c322753691e36. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF1435784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7502a3e30d8cd04bb32a753046ff397b0b0aa6184d99df94f83041c0fbae88ac. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US3DF1435323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3884e1f75186a27a2d13b626cd7a837efc542892d2b61086e645b6293f7efd. 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/US3DF1435778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bd8fc97daa777792eee01b0ee417f3b56b56193ce8a04eee7bc3538f8296ae. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6DC1520820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a35175c94b19921af6ff1fe6f56a51ac7af9938f5feada78c33e6543d3df50. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/US3DF1435334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba2de4de46a0ade8d9495ae23476ff9ddc4259a526ae64af54f869d6ee9fe7d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US3DF1435324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4eb7f514aba4b9dce5aa59c43c3764542005be062329ee01190a2b263af0fc. 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/QM6DC1520260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e95f2fc1983d85a9be29e4f9f012d273c937d9aaae80c7f97adc0a24a36b5cc. 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/US3DF1435329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdb1c9368bd44baa0b585402a847025bb03fac773d393d28643907b53d160e2. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:19:07Z), 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/QM6DC1520806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa00589bebf9403ab4794829d02cfa7645cb1841587107f75ad7b0edc32a744. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US3DF1435781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cb906bdbee7c2ef932bf37bdfc8f1b2a51755f3313686faa3bd77d681170f4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/US3DF1435330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3228bc2492aff275a69a46c7c2d8fe0cd612d4e8cb61b26b53266dbb972fb858. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QM6DC1520814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76d73d58188de32edafd9f043110a2ebe70689a4a67ec03a7e63e346e4ea088. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QM6DC1520809.