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 0x89a2baa7db67a1b581e3779fd8a82dafafec2958d5a226545f4dcd0871e93c23. 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/af9eff27-57e0-493d-92cd-5fde338cabd9.json and https://artists.proofprofile.net/proofs/artist/af9eff27-57e0-493d-92cd-5fde338cabd9.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 0xfdc5571b7106f1cc7f9c220ee55a06dd0d4d1a3731f18222ff03314a4e882d54. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM81424948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c99c5b83f55701713d8df408f1d5feebc6f25cbcb38a7d7d253c19939f5cec. 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/USHM81424949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bab3a0df80a47d19b60c6aee8fbb322268749298e768a65fe34f7741d884b76. 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/USHM81424950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3f27d2fc384acb93bc25a42acc7127383a7b08668d1c62e8f63b80c6004c16. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM81424951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61f643788449d2f04cdab46526bb623ab2a707d1de328ed1a01c00e56ddd6b1. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:35:32Z), 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/USDY41953840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae729a2c6edb70215f69ab32140536848f3509107b5820146c12e863c0e95e9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USDY41953839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcf165ee1026366dcc13b2b0b0093165e630c6d5bb6e71f45eb8eead2e000ec. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P1929018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099c863d776d8d0cb85a8f713c8072ed8b8ed0ec9b7cb057ee728ead03ee711b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P1929019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b92523777d9f713e31437a11c35ac2bd7fb81eb646d904e889139257316a0d7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USA2P1929020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d1c13e90ee8b54015df0141a1c0ce43265adc3a161932f524da3e4bbec7788. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P2217551.