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 0xc9e18fe1b9b4963dd29d8c109fe6d3cd60a50682eb75846446e11f59f49db9e1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06324519-f69c-42a4-8efd-a837cf511740.json and https://artists.proofprofile.net/proofs/artist/06324519-f69c-42a4-8efd-a837cf511740.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 0xe687b4106608b9f61211dca5963f76d41e4589556bb9422981cfbd1f8f1fc666. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2509835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872f28a73699e4d32a488f7972a5eda35348224991813c6ead8d2ba1cba0c1e6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX8LE2578997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bc04e1861d259e76a566dd4274995133649ba3629b317200e2a9b562e8f987. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8KD2570390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197cc6f0ed44f6a0a214ee8ee0c9147a02f69f20d7fae25d993618300cad6851. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ8B2471217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87b15be1424b6722a45b84e7d7f42598ce19f546a3dba7a0b28a0c680694a8b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH7812418785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a77908ea352ce371b180b9a5a7dd8425636c4391956e60bab3f9f32513427ef. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAW2460675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff44a570552dc27050f5a3a99cca624135f732afdd2a006d23e904969f3a1245. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:04:18Z), 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/GB8KE2414422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d1d1454a8227c5570f2e62d7e095f3bfd6f5e154ada32839d126c2b4e17e7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWX2474156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0ee90a2940025410ab1d9f60c5449ee880c52bfa20bc823a4004f0e082066b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6P42441327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689039596df91f3ec218705610391e65f5d048d6276aad5fd6d6235bca6de7a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US38Y2314594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397246b459382778a4e2e8dfce600fccae8eadda560f27f33365484ffca0f387. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2326328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7952f86e76aa876988b399ca12dd4479677c20afc7092660e7bb55ff6ce2f145. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2325375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf465087d4bddb0550686b73b8dfea4441349b147dda580f1776a6ac308a40e7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GB8KE2211828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dc2795482e88fc48349df4f22edfb49ad060aed0f5244ad53c040294e63afb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB8KE2303501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319a0533b77a82a02a8a54c32b08d8cf517ebe5b29f6572d16864afff4d14e96. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2303511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb470dae6fd1505dd525bda52ca7388faa0db39344e404244fc1ee0328b269. 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/GB8KE2303516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b5bce9e6b12e91e512ef46e647f3bd6e057abb438a2020ff0d41809b150924. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB8KE2303518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb986465bff9536fc0acd6a67a5fcc568475a872eecf2cedcdced11f6fb7c11. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3HH2594820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4d1d1454a8227c5570f2e62d7e095f3bfd6f5e154ada32839d126c2b4e17e7. 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/QZNWX2474156.