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 0x549d7829b2184e425956436d06c12856c0c0e462ffd7f1615333254214a8fa74. 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/14a891b1-017d-421a-b6a1-95c73d63bbf9.json and https://artists.proofprofile.net/proofs/artist/14a891b1-017d-421a-b6a1-95c73d63bbf9.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 0x631585ca49dd6785648e21d2b281205cdc8a8b757a68225f053be86633b56a1e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US83Z2466618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecbe29493580bb7f8c7730f1230fcf9811226197137b28910eda5d7f34cc3ea. 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/GBKQU2391897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2f214bec1358913e31970e56a09718103e7126dd8ddaac0226924a5ce1b161. 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/USLQ22180606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5336557af4bbbdc06a43aeb1c02e1a443149c1385b8888e35b594a720598f6fb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8LE2324825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff27865db7f8f316c7cd2462496294e4785d5c5a0481e6f153e6892b663a0d2e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKR6V2390217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441f5c936f94e1ac346f885378d77987b44d7be7bb8eb89a99a5759f94c2185a. 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/QZFZ72373132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa3cdc03c91fcb0b166da3ac9256746b2dcbb2a8121836bbc61f7ad04edfd9a. 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/QZWDD2271523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e09728af6c7c6d8ce64673ddb99123e525a8bd58b4335a964266b7035cb0a55. 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/GBKQU2278697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bf6efcf1051ef53439e3919a6c50bbab2fc14c69e90b4edbf986c88214e9fd. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBKQU2276952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455ba5dd48315127022af7f4c13989aa78293cdf0b70cf13595490c5a6fac296. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLQ22180445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f930d4eb8bcc11d76a84112bd5ec7b2fc46f5e039427a737c28ab78f0aed3af. 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/GBLV62119395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc449a074efdd0a3cdcd1ea3fb8a67278277a7554c70c7be623571c9b1de6ac. 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/GBLV62100187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04561b1a2a9f439df8cb40d0243f79410866b56a263ef8a2f59283dcbbe88754. 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/GBKQU2176007.