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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 0xb03b6b30fbc0509224048a270c0b1404bbdcf8ec0ec2d7891f4bdecfbfa0a68d. 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/60b40bf9-09ad-4832-94da-bfd9d7b04d63.json and https://artists.proofprofile.net/proofs/artist/60b40bf9-09ad-4832-94da-bfd9d7b04d63.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 0x081889fd8d4665cf94bb524fcc2cc75ecea0d831a08c07ba57e89162b2f72c63. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMRTJ1601045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8805dfb2bac1bdfdff6faa17294e2f16b55faaec9e66b410c41a61e229016eb2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMRTJ1700950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5bd55f5e59033021e6e2df3a8762391397c7ef23a3f8168d543373af8da834. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:25:42Z), 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/QZNJV2134355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda7dcd25040d25871f0df5c991c25ead0123a09cbd16c8970cd62ebc4e22b10. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZNJW2190406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93b8b12fc3ecc50d02dfb244ef5786ccd8ec4be313f80b5ee7b44df8a3aae7f. 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/QZGLS2288403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2639eda2266ce52045bad41a197aa37b767c56d12bdec4e18161e97f6c797366. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:38:05Z), 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/QZTVM2313021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb980de7652ba96910bded3f0a4073e2946c629a19f5ad4d4aa3d70711ed14613. 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/QZ5AB2406535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2115aa63328caa484173dca23ff8a4e72bc66d2f85a7219d867c86633dbd0683. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMRTJ2401175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ee9445784ac84cb907450c64d2a4af764ccce956ecf8ff4a960fa1b061549d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZEB2417761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5cd9a02958560a1ff0ce91f4623e998f7f57980179d7342df3a44726bd643c. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US7VG2549554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce0cc8a02e7d5b315921440ff6c0809903042d8833f39a0924ca173879969aa. 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/QZGLM2519706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fa12a877fe50537469d36034420199fbc99775a71f3a06c805a2203c6d8c74. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMZ92543756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4df8ef3e0eca4e8e575346633fc8f416b9e36e2304705a1986fe509d9dce365. 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/QZNJV2595086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3f24040d709ff1ce60231e295df78c92b7ce469105a76cd56cee759b85c3b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJX2545712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad8aba58c82a0855ebf368bbe914770177cb766c7cb267e8fb100fce3681d71. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNJX2519645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342decffe911b65b6626657adcdf930d9d1f1f7332fe9754a8a7abcb43ae9bbf. 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/QZNJZ2540797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491e29abdb0a8b5558252ccac6f111ee6ab852f008fdf72d4e933abd454ce8d5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMRTJ1601063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5827ead5c1b3d2d0909714c28715f67ae53a2fb55d7cc4c749d1f36d0697cecf. 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/QZNJV2482613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf532530c55ea94d025651d66e758f3152bb3f94060968d8f896d0b35c1b098b9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TRAPL1500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5fa7e015040c4be7e93a97535ee549992af91485dd9bc5ec1cc410b76e1ae8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:54:31Z), 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/QMRTJ1601064.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch