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 0x1379b18b4b4a509196342e94140686b7aa211696405e979470707b38738f2e12. 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/b99dcdf2-3697-484d-835e-f5534e102ae7.json and https://artists.proofprofile.net/proofs/artist/b99dcdf2-3697-484d-835e-f5534e102ae7.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 0x90b386f1db24525c47c8a4c6ceb04c0503756c4368151a31a2e469e3f4215176. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:26:10Z), 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/QMEU32115761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec07ed7d58c56f31e834ead9a71655aa8911846f8fad315f4f224fb0614d329. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/GX53U2001169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f19f097059b8febd0c7673ddc15f8f41c0fa93e9fcdcd8e23791a2fb0e960f9. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:10Z), 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/GX53U2053033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2b43c1b376779d9235c63f63f45642f930f8a1328df0e946e10e6243fc2ea2. 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/GX53U2053038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21529c0d08141ccdb7eefb3ce0128caaaa90c4733a8e50030a1e2ba496e1ca69. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCAGX2360532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde838ef111d8484150da2ede2fd7f6e2546822ecb3e5e5ed1314b3744fd9765d. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/TCAHR2326961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402b36dada053b10e7d754d957e880a3e90a1ce3252647d8bab9f7bb9b013931. 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/TCAHR2327347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e12264e798b24203aa64c2ab12ce278e23d12bf425267a354f9593a26edd93. 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/TCAIP2443074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83cf10303324800bfb62b46169b303d374516f5c9e3dab75875a4af46921b67. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:13:31Z), 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/TCAIR2467456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85904bed1072c08a4f07afad934ef5f9bc4e9d859d76926406338580a14c42cc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:54:19Z), 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/TCAIU2485806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017958101ca739d4d72374664bdbee177a7b127f87ccfd0e934bb53b4c86f611. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:59:51Z), 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/TCAIY2474693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355a8e3dbcee47a6d3d58529f994031e5edfadd34ebed3bf5d4b8eb61a0b1d03. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:43:50Z), 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/TCAJE2549959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d11d49ebe67e4554f9e2d10729f12a114cc4c8f6724e20b62ca8a9fbc608fb9. 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/QZS7J2388106.