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 0xaa1e1c52ce8e68660ed4bf6a7cbc07b4eb10712abe84a944e060957d49bfa9ea. 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/83db0bdb-0dc1-4654-a751-fe164b48c061.json and https://artists.proofprofile.net/proofs/artist/83db0bdb-0dc1-4654-a751-fe164b48c061.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 0x9fcfd032a0dcd5387198ac33e617b0d38610482218eb6035fc40affaba98fafb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:26:55Z), 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/QZFYZ2309350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd258e3df5c852c75cfa8d199f2c41e29e1a55e60130284631da1ce03f3a2c8e5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:11Z), 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/QZWFL2310575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb550167e43a056deccde83c49a4303b100335700345b49e4a57623ae688de41. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:23Z), 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/QZWFL2327465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3700288b3252e8a3a296f8baadb1e547ea0c7462b1384e977bb07e67d6e21b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:30Z), 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/QZMEM2445140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7f0061c73c860e14f5e05d97afc27a30bb50ee16c6ab2e385cb1669a1817ee. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZMEM2446651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38fd98fe186644c6772a24b820f59bfe4bd9ad37873e030384efe2cc5c978c7. 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/QZMEQ2422354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9e694813904222341f41eb34102320984f8be3753d7df6742aa77f924821e2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWT2443916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8ffd62fc81eaf42f6cb1064b15cc703c18248e5834ec8ca9a27f3354ee021b. 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/QZNWU2419970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a149c86f0878e0f60cb629fbfd07baa63c1bc3f1f30f609be011990265985. 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/QZRP42495485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e698f241f854a346878f915b09ad5ca2b238017eaf392fc842676d7d23ae99. 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/QZRP42492982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069890f70e200e08b7698561ece1d22230570070df987769954a27b4bd497ce7. 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/QZHNC2429555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8073c6a39a8f1990acb89eeb070a585783ab521655241854456da90ef1f679ef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:06Z), 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/QZTBC2452452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30befd0af15ff2f806f220b7e405b11fc90c88029c91834af41d689d9301c8d4. 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/QZWFR2404837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e2b8a4f4e52aaa6205b30177c292544c22326c5e688ea3e6f986f0cb36e07c. 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/QZWFR2483457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4311cbca4875b7578c80595f99e3933278f16c170cdcbb0407a78e9e16533bd6. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ792427450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1356b6ab8116ced00190bd97350ae85a57af6de0c56869b031dfdbd25d47e3e1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:44:47Z), 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/QZDA72527313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce263d9885bf94067617d8d3bb7346577ba248df97da587464c35a68fe5d085. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:00:42Z), 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/QZDA72532699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa547c919cc7bfe356092320597217bb90b756979426ec7fc1bcf79082723da. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:47:18Z), 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/QZDA72530924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6aae5d288ac6f0e374b8f941c0bdae693f5706e42e1d5f1584793c5420cf46. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:34:57Z), 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/QZDA72527499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc978a9b3b9cee6c4d807a35823f6ef1da80926a1146c603964f3f4b5228cd14. 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/QZZ7Q2460416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635b039594b01df5b346c892ff36cb97099440a51564801dba30f30f268c032d. 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/QZHN52513362.