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 0x7ba039774890d4b604ecde75928c4ac7d184299220cdf93a0630a60bae30ca9c. 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/6b5c2c03-4da4-4d59-a1bd-f3ba4716843a.json and https://artists.proofprofile.net/proofs/artist/6b5c2c03-4da4-4d59-a1bd-f3ba4716843a.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 0x2ae1d750301a4aac84a8db9c0fe7b11f024e34c471f34dc09206d83659fc008a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:59:01Z), 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/QZDA52185960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559fbb9acfb27c60efff9ace128eff77fd344ebe5ad6f891e7cff91132a05de9. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWZ2172215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4741e253e4cf692fac0ddae407191f14dacea386a19379789f44cd440f6b6b95. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWZ2172216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26518bac3a9cb9a61b7288034153ec427bc9c344c47e080d524d4646239f1c9b. 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/QZNWZ2172220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaca5791da059e3e90949e19f2fb4b12e3ccf0b05eacc64d8321a26571af6742. 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/QZTAS2192141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a08bb08dea71a51c90fe09879872bd1f44e8e9fe618f905ef59a773126a44c. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:20Z), 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/QZES72244463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904111d23a07718de88b55d3945a0adc0d4e938eec1d7d18784a0c651c80b205. 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/QZHNC2223452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafed5299bfc9c0dcf5f2b9b83cdd6ac07eb0d046b33ac57d2988d0c1649c24d5. 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/QZK6M2231822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd83f6a041536b427dfd75bc9bef531f2596dc1dd63dd1c6fc0cd3babf3166d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEN2298288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0054dce551be2bb5b0be9def6758ccb2c7043221e0e921c0ad3cc61f54dd6d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWQ2213831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31ac1c6b1b78d2c2eaf2cb27543827ec06d34fbcd7bb6b97fc7d3930bae097c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZRP52225917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b124d2401d5e79ad080e11ea6520149a63e2dbbc445feef2e210dd050f3482. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTAW2239785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce54d75c269c9730a8a69aea28bd57c094f71275ed3ff305e0136dbc507a6a6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:33:04Z), 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/QZHN92322307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b27a37b553f4413ce19f739c41676ce1ef3accb8125626267ee79382d5f53f6. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6J2316453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd77dba26550a9ded77032edb67ebeff3ebcf18cd0f56e67e6f8a5dbb7adb20f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB72306232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d7e6a45ff2d6c44f0be05930bd865888c45d9feadae549adb65c51cdf95191. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFZ32488361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1e42c7f7976edde63a3b6b8c26bb80d9d14f78e4b9e8ae9404c53922fd7cb9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:59:43Z), 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/QZES72427541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eb6f3b6c4936c50928a7a41af76f9f55e863b76d702683a1317735f17052a6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES92436117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6a3edd8f55ed2af47151f4cc4f230b36ab331df98b6e5291f5e8f456bd168a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6J2475566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fa78e47c53e99609cf3190313dcba68e98daca89c4c2cd181c1f18981997d8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2568720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1d2c92313e049dc052d54b069249c5a2acc9c80c64d4b73d1a2d5f43b9b8b1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2568721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6b3d4b66aa7f7b9a8cb2414d95b9da113f893b0b40ebca434f37566f548321. 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/QZMEQ2568722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f11a328eb25e6ecbc57f3e1808e2aab194dfb1b560182d5f9f6b87147717e16. 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/QZMEQ2568723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7769f8d6230f8684ece9df5f338604fc0aa0f191958ef2e7b6debd767b9ae1f8. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZES82598455.