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 0x46d46d13ec5f6784560a6d7f29adb16f27b8dbb1e12370912815d68ac906cf94. 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/e39e7901-33f7-41a6-b257-d3bd0506d53d.json and https://artists.proofprofile.net/proofs/artist/e39e7901-33f7-41a6-b257-d3bd0506d53d.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 0x72f569f54271af556907ed53e9722483196ad92ea94a1fa38489b94b0b334873. 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/SE5Q51700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea270d0267583aae32f0ae39f40184c8db2213c80bc252b01c376a0628eaf66. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/SE5Q51700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e257913d5b2b3bf551a1a1d69f7758f21d0fb9cbbedf508e919b7ed52ffc68. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/SE5Q51700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11318ad89c68c5ed7d3b73f3eb78cb403ceeb71592699d556641a95ea14d34c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:12:02Z), 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/SE5Q51700504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc7dd32ebedac23004193cf0cf4ad79312689125247b1e6bbed0d84c795603f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE5Q51800872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501bc7c86f5bd9b844cbcd4c709e6e40115f4ba7d4f5bb2ec73111ea37bd2ba6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:43:06Z), 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/SE5Q51800873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4471a018777197b347a6fce5abd7a4651ba3a4985162d987441835317a2b4077. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/SE5Q51827558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211ba26cfe32b6d4446bbd773709b86a10cdf25501c3d9ca55227b0dbedba963. 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/SE5Q52101231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3cc15fc590f2e04a20d7ef28403d764fc9e91fab00447114f236d6511328b4. 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/SE5Q51700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f569f54271af556907ed53e9722483196ad92ea94a1fa38489b94b0b334873. 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/SE5Q51700020.