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 0xd5ad5b0af6b92383b807b3b3ef4dc7c24dfcab651b281944988d0a6a566e9749. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/387224fd-5db1-4fcb-81a4-b8ae1f3a65d5.json and https://artists.proofprofile.net/proofs/artist/387224fd-5db1-4fcb-81a4-b8ae1f3a65d5.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 0x76357ba3dbeca4aede04919b1285a87344299bec867dfe600db371688deb2a3a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:44:32Z), 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/TCAFW2143019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9e51a1e9f2aac2f5e438e7337c5c3297371607848e100fc3dc7ac7da3d3590. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:08:56Z), 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/QZHN52467932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abc12042b396b2d22cafd138672ac2b6a28ba7fc09f0d1774eb02d2fc5398d9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:48:10Z), 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/QZHN62551594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5111990f9226257b80e3029a24ac07607694accaa0bb2037270a155f155df78e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:15Z), 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/QZHNC2545758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3527022897e7bb0044fff09f4c10ca0e844c5ad6b0941bb8949fee57260457ca. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:21:32Z), 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/QZTAU2583118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8187fb3c92e719d05ac2fd7ef1011f6d5094028b5bf7fd1e0540a21cf116e6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB22521154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf429ba5654aeb6c432690b8cab136c8e0a99b8f155a6f9b66294b2f11c94d40. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZWFG2593329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acf02a54ca94cbbdd5d5deb5527ec39c6f1e2170b8499e500f6e31ccbd09a08. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ782571577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0fefc4bc606a2a96d019e92339a8b2a38fe62a7c0dac7b8bef0553c4560ee3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QT3F32558748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4373ae880ebc090cbc7bedf2282ab13c8771ae47a8fe32412c34c1039bac4543. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F62577389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2e0dcf36fd60201e039293684af89b84260452769799ba18f3ca3fdfbbd999. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT6EU2554198.