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 0xde21bfb7794687670f46628505fca96eb5bfaf2edd3ee5183e1ee6987a56e5c8. 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/eaff6fcb-cac7-44b0-b921-15b13a955f7e.json and https://artists.proofprofile.net/proofs/artist/eaff6fcb-cac7-44b0-b921-15b13a955f7e.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 0x5b0c237e643e6f053c65015632435d9cd0e2e89d1c1be4106fe4b8117ad194df. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6542035525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9a3ae463101a3dfb378db2ceb955bd512a7ba77020886db5b385558cfd732f. 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/CH6542035544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491cc459646ac2d6a4023943aca109b613999d1edb653ce22b05bef54428d573. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:26Z), 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/CH6542035542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3defdcec691064e33b2adcdace435823fa64a6b93d22ddb727bc8959b2b6e467. 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/CH6542035546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0c237e643e6f053c65015632435d9cd0e2e89d1c1be4106fe4b8117ad194df. 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/CH6542035525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9a3ae463101a3dfb378db2ceb955bd512a7ba77020886db5b385558cfd732f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/CH6542035544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885f0d5f71c41db8890fc83bc90afa8b1924f53d33280ebf1b9dd0722cf659d2. 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/CH6542035561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c848d9b0965486baa7badc69dc00c57ddd31cefb8a4557dfb518a7ab92ec21. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:48:25Z), 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/CH6542051458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d19a7328118c6e4399b3762655c389aa13c35cb689f1eccb1c3bb53d418f0f. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:07:35Z), 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/CH6542035532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d19a7328118c6e4399b3762655c389aa13c35cb689f1eccb1c3bb53d418f0f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:32:06Z), 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/CH6542035532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f478bdb0a1ef0a46c16fd3cfe625e016c006dbb6dffc7cc03d5e12e0ac3de1b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH6542035533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe543dd1fa9601854990071e6e639f627be134cb0e11db66a81e2212c27d5796c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:02:34Z), 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/CH6542035521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f478bdb0a1ef0a46c16fd3cfe625e016c006dbb6dffc7cc03d5e12e0ac3de1b. 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/CH6542035533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24315d1ce9e3c6834999042433dab6b3cd2814fdaf164317648893a98c1d0eaa. 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/CH6542035541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea2bb969572e5f577a372b036df0c78a3aa8b384e1d68beb5c2432569853c1e. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/CH6542035550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2511804d1e8f6f8bc3bb815a49688a41ab3a36798e5c65db091148da64286f9e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:26Z), 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/CH6542035559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7d63d1cdb0da60f532662b2050185b6d2b330b93f4c331ced020a18ea3162f. 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/CH6542035534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7d63d1cdb0da60f532662b2050185b6d2b330b93f4c331ced020a18ea3162f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CH6542035534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f88ef27ffdfa79a046238b32e84e7f403aea65821c0797482db023107e2ac98. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:45Z), 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/QZFZ32597169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bac8df21a287c6667e4fd6662a200f168e11d637a054f9a6abafe75e5ee6430. 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/CH6542051462.