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 0x512a280c68df6f5e14473a0c4ee9688fa6b999e73640112f76a65878d93883fe. 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/70526f7a-e557-4eba-b4ba-9b89dc78ba04.json and https://artists.proofprofile.net/proofs/artist/70526f7a-e557-4eba-b4ba-9b89dc78ba04.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 0x49bfa9aa7a68983caa14ef82536d32562bdddccebb29d5b1892bb48bc2802dec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH742178761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4f8058f3b839a77bd712bbc9fd67f4d56246664525121194a40637113c85e7. 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/DEH742214907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cc70025a61afe51f5b3b9a13ab4699d080dee18603132378f11d7d2e121c1a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZTB32283958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869138b968d3e957f03aa286fc17837a3f8fd657ab887a9d69ee825227818ece. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWY2375364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2038d04afeec08c378c5b60b7c8ef4528e0dccd51ec212659ca478932634ad. 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/ES71G2410625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4012bab2877ffb7e701739bd7515eaa4476ce24f4a69e798fde9ae300366cfbf. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZWFJ2467485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0589b9170e8ca0d580abe7faefe5a48890eaef7ef9921b620bba274c9a8e7315. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:34Z), 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/QZK6Q2538272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409e86d7d2b3147ce55b4d74cb5610e318fa5a7d00a2dece31838a491414223f. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6Q2538273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679e1565f38b3261a49c47e65479830ca8d90b5cf977ef862f68aac42059a204. 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/QZK6Q2538274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc347b43ac54dce68211c8d7de07ff3d646ebf2af45094c50be1f79498fd02e6b. 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/QZK6Q2538275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a206e0034cc1c2cf50b2ef5c31137a278e77eb5735955d49b51f6241035bfda. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6Q2538277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7800abd7fc98cbb48f68a22ef3c4039acf07b41be6f4874c74b031ca99e854fd. 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/QZK6Q2538278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44de6f3fd71199c97c1f8d05b2df894c1f9e84fe400a16a54203ccd859ab7376. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:42:35Z), 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/QZNWW2559776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a4c87d15766e4ae1c8d31fb5e4dd488e07cf1eaf586c0f8bc62bc2521090bd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWQ2274196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147cbe38cc03f9bf247c2df5a2fd0a6a625075a2917f40b3e452f0db794531f5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH742101312.