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 0xe838f14af7438f01c98c95ac91fc7caa179988319ed7eff9573a4cb9c1745ba4. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a85ed3f2-02ad-4dba-8552-31ebb7b39164.json and https://artists.proofprofile.net/proofs/artist/a85ed3f2-02ad-4dba-8552-31ebb7b39164.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 0x9a4852182d7571dec41c541190d94182196d7ba3de8d905b3af529d9634eb7e7. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA82511743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7cc7fb812fb3d4b9a7a76ea8ddfa44d87b902e9c19d234e7ff86e8b3a648fa. 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/QZHN52552129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa0972b1aa0aa1624338c7bae46e60b6e37dbca75f52b525e327a8f54e5a572. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZK6Q2517598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0424e230e48f4fa219159975fb415e30a8122e07cab4f81bd56bee57c6cc75. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEN2544275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28936b26cee6b038f36f6d913001b4f36d7377ebc5d1c1aeffa8aa00e71576e1. 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/QZTB92514779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487a33e9daf9ed7c60dde575a773cbd1684362865db4513ce05b28fb326e0d4e. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZTB92514780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ad3783a43f6e360dae2c824e67540fe53adfa83a76c555eb9a4be929f8170. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZTB92514781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf705552badedeb46af9a1a5476fa2146120c7a359d00f7b565f7290b82b8d856. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:46:19Z), 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/QZWFL2528034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765aa5ed76b879f02ada33e5f4ceddc8dd6bacb8c24571584c72a54a136d9538. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:24:39Z), 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/QZWFV2516335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d420a196d9089332d94ba313a2d782f284d5d0438741abe77c6b9e413a1cb23. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:23:41Z), 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/QZZ7M2514872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579354ff7d8d725386feb163a09ca47aceca756ba3cff7bc4cb8f40683138b2b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3EY2576957.