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 0xfd63b956ef51487fcd09562e6329287af71fca042197ad2ef3928033303ef0df. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e7506a6-8a5b-4768-ae52-85229e3e9a6e.json and https://artists.proofprofile.net/proofs/artist/7e7506a6-8a5b-4768-ae52-85229e3e9a6e.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 0xe2f2d4237a6589a7c13e78d69fc6b96464561e2ed6e84422a1ceb33abd8f0451. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USD8D1315001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4671db0fdbddb57e2e588d3d287e14469e5eb927f0377022765dd5ca891981. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/USD8D1315003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1499358686aae4bf16f243dcef84d2ebf17abf332a113ed3de9ce40346ac51a3. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USD8D1315005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2823041344c979e45ccac98a96ffca180eee6c7926164b5868b83269ec5a5db. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USD8D1315006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a93faaae50ff6222c9eacc5cbb80961af170ce864212d839783b2bc8634cdc. 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/USD8D1315008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83132a35c3c042546c3ddf68412d2d08cb455c67e9a9f736064f263e9a84b24. 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/USD8D1315007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fc3b668d16fe09a37307df55a486e7ba3560f5bf7df64dc3ba673b4ead647c. 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/USD8D1315010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd305247e1494c20079068c1512c511dd9d46361188d147409f1a660c6dade64f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USD8D1479003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5add886cebc66a00b3b9e8b85f1ceffa5afe1ff965ba0542c9f69868200bd9e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USD8D1498002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2610e7db84bc44cc0d530a505ada7b81ce50e6043e1d51317fc0208cb533b5ea. 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/USD8D1529002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b21f1620560fa169426ac8016de1278e03818b11bca89c806398792c5cb8ba1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USD8D1529003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11f1678bebfccd998a4f0e97f35333f5ff29b93c9d1155f5bda10fe3f808ad5. 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/USD8D1529004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502129ed6e56ef8505438f07194842feca7a3a32ba80d404ace4893d15d43d82. 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/USD8D1529005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3ee313812f2f1742e468060f76685096f766b12b354b09411bb6b16de75d48. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USD8D1529008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c3eeef9c61a5ef7089e0c8351b965aecee82853391a09a8354f4373b6395de. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USD8D1529010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ff7311c3d4a3ff314afad564d31158b613b62ac2c1a78a2e7b328541740389. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:37Z), 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/USD8D1529011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf934332e67dfe8471ca2af5e06e3335e09876593feeeca7f4c80638c9abc1. 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/USP6L1480203.