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 0x998b4ec1f78c3ccdae2383874a0c75f95d27008e629b80d62a2cac6d2b720094. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f288538-a332-413c-959f-6f1f8fff404a.json and https://artists.proofprofile.net/proofs/artist/2f288538-a332-413c-959f-6f1f8fff404a.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 0x97d425b289b165ca96a52ee2c6cdc8d0b4205530c59b447f5836c751fd676a6a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZAKB2008273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8743c3bffc3df39faf39af07af889ff8e791d4140973e799aa6b520824b99a1. 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/QZAKB2008275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf5e1d5658059d5803e4676a8d8153277ff1f7a03d1b4827b5e4009feb7bdb8. 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/QZAKB2008276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b4f0b3032f3aaa04c9aab615ff89f8966f84ff3abda59186a4954a1cbd8fed. 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/QZAKB2008277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217180126dfc6bb7c64917c8634c73e9d7c3741cbabe27a2e73f31fd19ee3472. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:01:52Z), 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/QZAKB2008278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844f44b2ef2331f794ea537dc8dab1a1e94242220ef05d4804c3dac85b6bf466. 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/QZAKB2008279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4579ff7e321e06f65e42d26402bb0c2dbf7fdf86cd07d24957bc257bb03e4230. 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/QZAKB2008280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7198e8e96e2fee34257ceeffd4183276c45e5a76de8453b13aa91071762c5f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:08:51Z), 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/QZAKB2008281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4e4dec54c87862022459d180d62deaf030b1fd5f0dd994e53fcb2df2a4f3e5. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZAKB2008282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba2e02f41d1e02e5b647f1db6e07f8f5d5e6c312f3d61f7e606e4e671befca2. 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/QZAKB2008283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca9d787dd5c0e843c468033346e503afd6e011e15b1ff0b78452f4a083be8d9. 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/QZAKB2008288.