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 0xf476444eea584a44488aeb0f7b9c65b08b4baf14e084a6c85dc5ea2d82b13fe2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c966ee87-0960-4d71-9283-7483988cefab.json and https://artists.proofprofile.net/proofs/artist/c966ee87-0960-4d71-9283-7483988cefab.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 0x8a32eaba5e9f5f46ebf16f800a9538089dad15725871ca4027e451d5600cffdd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US3DF2271021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41567103cc6e20cffb092317a2dda06b923b2433bf435570eaa14ec6a39ee984. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLSB72200927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3eec0e4dab1c7641cd7f704a638af08e527ab9e5951f2c9d2937421dc441a1a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USANG2281136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf577ad969dd9dad938357e9ef434a171d0c99b5ecf8b61a5140ce1a36a91f0f2. 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/USANG2281137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61913a2cb7e41046898591d24cd28ffa42f4d87a1fc53a60940cce2b5d53fa4d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM3DF2261851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8077daae3ef509b8302a809a24b7f32c1e2bdd4b2bd3e73e515a2ffe35f2d5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH7812363017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a11c46fb870c539fdeb14a5f30f321ff633db990f21c50b2e2b350cb8e7e5b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:01:45Z), 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/US3DF2455484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1a98d5735f149fe8567971638510f0575a272e40728b7ce309ca464b763e7e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEH742429006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2adde77765f47dcb79aada5675e4581e364b883223eec39b5a9f1aceb4bb57. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:58:02Z), 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/FRX762418061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c55649d140d652f6195d5ef00f843e33272d2f2b010925ecc8a6a05975fba55. 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/FRX762418060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835bf464fc5dc0e5ba351b95e01ba7b6710a4e9f58cefff08e91462db4f23e5a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0L2465405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a4759c84bb881affa48b21d385d2a7a9ceadb938362a66ffef83c7af3e296a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USANG2491809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7d629380d37b12b3e7d2ccc46ec16bcc46df9208513906e90b2efce1d6433d. 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/NLSB72500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7357599a1f00a122172fb2f7b360c2873113650180f60c96bfcb4ba757d1f10. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/US3DF2533985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dbc2169eebe026fa7a3fbc8721c6f9d7d0a7712d01f17e045b3e97fbf80eac. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US23A1598603.