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 0x8144442a6def224044c1ba66480026c29bee4cee980d2de4d2e17ffd4ef33401. 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/653d2075-6c62-41aa-8339-4f067235a44c.json and https://artists.proofprofile.net/proofs/artist/653d2075-6c62-41aa-8339-4f067235a44c.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 0xf1ed967f1861a9b17dc168ca2d7c4f2a2050b4d87eb6b339ba139da947cb0137. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCABO1378740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b93fd05c97efbe3cc50916331b1f48eae8ef958733aa6e8a9509257d083886. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCABO1378745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4134c220d046a99ff3ab385520fddb5756af213896f64210257fea8f588908b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:54:58Z), 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/TCABO1378750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a18e5e1818169de9656016440990a25a5d965efcebc05a3d2cbdec264188d72. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCABO1378752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a13d4b75b136f1843cb6e4eb4584b668b0dcea618af344a3e1d23dfe51ce023. 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/TCACC1443032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef3f9a1103db0494311fb54c73530c7937cd076c6d295d534e0474c59b20803. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCACC1443036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b69c1342785494e96f5dbb975e3a992659239a9e4c6ac4a70f6643cdb84a7e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCACC1443037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c325eda005dd5bb41a17564912366da0ace63a41d2e4271bc82a4528e5a7147. 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/TCACC1443042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bc4deec541af56376f085f8ac5cebfb286a4014dad8b86bed728ec9018f972. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:43Z), 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/TCACC1443045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f5ec345c5b016aba20f718a81d52e36b6613ba215b81181dd23b6fa9403b0c. 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/TCADK1721988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77921bd7c9ce4bdfbed5cd5e0bc8bdb37485267d7187e9b1dcf27be0ecf6014. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:42Z), 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/TCADK1721991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf54dbe8479edd54ec41bf387e019d9f8849da2529fa24637c252cc0a77aa77b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCADK1721992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb847a38588c69078cbdad27d3167d7ad0aa0df3773dd4bdf05ced2772207e92. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCADK1721995.