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 0x1eb4d89a86cec0a47bee1515fc49ca0dfa37b628c65e7d681526a09875f5402b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e858a2b-1ff4-4d9c-b936-13211300c9d6.json and https://artists.proofprofile.net/proofs/artist/5e858a2b-1ff4-4d9c-b936-13211300c9d6.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 0xaa2cda6871bcb281aac2a98b6be35ca4def93f4e849684fd5ea4e696e0da5b1b. 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/GBLV62016573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffb90528df66a669479fe1ce4afca0086a084d561b5f6b6f09679fff4119422. 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/US83Z2106816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d67b4dfbc3b94c0fd69f2bd83b75b5d8cb9cd0a17b140347f8b4c7488e2662. 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/GBKQU2059896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ee701886f7ffb7c886803a0231107cbfc66526b89fe1bc5abeaea2bd0c09a4. 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/GBKQU2059897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89eb261564035afdf65b3dec47de8cf7f8e291f6fcc8a7449bb8dd8f489aa71. 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/GBKQU2059898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51e23a2aa1575cea0bcabe6ba2df37233f7816b442402e9fffd4d9f8946991f. 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/ITBGD1900074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8e04cb8e47f8f6b9bd1603b8297cb025c321a2d8b1fbcb24d9c95284ed0d3b. 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/GBKQU2055593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e41176a8d9905858f42f3fe946a61dceac01e1636a2c738db160ac4eb3b8420. 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/GBKQU2055601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea02987bf4ef138521ab75c7e73d1025f5b8a7994d61f916833c39203705b28. 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/GBKQU2055603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb843fe2ae1f77aefb211fb70d8f53ff6d1761de1d8539633d9286114663287. 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/US83Z2114300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf4a0e3b94a25034d6ba155ac5950e5a636d3c157e4dbab57c77202ebcbfcfe. 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/US83Z2112640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0696ef803e052ec300b2dd7c3998588a16b3c2f339d2dad1743531487e0c5ef9. 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/DEY472271137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34011e4dc4ada02ffeccfc606843e88308169e0cf176188a5b27d8bebad0bfa. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DEY472271139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5209856b35c6c06230d0473412439144a4e670d81e4964ad7286cdadb065cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEY472271142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472c930bf9aba1d930e2902ef601e001c33cb8ee0ada77876704eee05d548955. 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/US83Z2133323.