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 0xff2d5f1b485555e616284782b72dc92a13002f19420f0ad7c9440e58b2de801b. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2a73ac3-df45-4be0-9664-d6b13e0b810a.json and https://artists.proofprofile.net/proofs/artist/a2a73ac3-df45-4be0-9664-d6b13e0b810a.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 0x4bcffc67241090644f02c89dac07a0cf48d1bb57961e2c78f1e869ab8d8129c0. 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/QZMEN2538662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a8885892f39854e7bb43747a3c0130bb089780bfc180179bfb517dad47955c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZMEN2538663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267f3e7614839c00a35bf73c001a99b7ba3414852390b45dd3220921a3715cf2. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZMEN2538664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6befc96ae99de2118323b8c9dfe672ec469d7c16d7d4044f96c96720e523f48b. 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/QZMEN2538665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669859882b34acdfd230b629594832ff4714237166cb17fce93d5822510344ec. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:12:23Z), 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/QZMEN2538666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b50576c63087b93cfc3e15f0657209220bdd1cb2f62e791ac514d7199e5bd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:08Z), 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/QZMEN2538667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30395f4b369615cb71e766de4a6b7555c4054f720a1edf73114aa22e52c960b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZNWQ2565831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f25fbdf19d20c253cea6aca8e0d9f2d03d4f081d03d129bd44c0f58b5289a2. 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/QZNWQ2565833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01687911addc44a06603b6075b92ceb2004ef32ca5c35fc36b92c0d4d58366c5. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNWQ2565842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f2eb9fae1ec288c3c96b5629375a7dab002378507dff6c7e39a570afe4b4c5. 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/QZNWQ2565850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc007b507b9d59019bc8a317519653185949896cb7bfff546ff878e494343e. 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/QZNWR2560433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bf10ea2f191f63b691effec239910fc6d3ab9abfd41b27730a0e30f047f0ca. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:41:30Z), 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/QZNWR2560439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2963778b2b6393452f70c55bf3c2ed23f7fc7503144db6f40dd770344a78fd54. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWR2560437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d24269c9bbbdcb14a210fb2ea2d0da91abc25858e661bd8d4eb8d935d53f83. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWR2560435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248041a21dbbb2df174d5415d90d97f603e8ca6c82168c051515004571449bea. 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/QZNWR2558540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaee626e04dcdd1eb84078d322e36c59995f670851ad8f2bf240f8559ab25664. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:07Z), 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/QZNWU2538664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80b0386455d46694a9254c2c42acf27c380b83bd386ad4aacd30079e2f3fd1c. 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/QZNWV2518502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b6d14c0dd4aac05d1e74280f52617e429179174e6863d366e5d852525de9aa. 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/QZNWV2516316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c319dec29f891873e68ec08bfa7728e36cb48463418b2ba33f01fdfd3bbf5a7. 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/QZNWU2594685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252ddd98e7a6387f949ecac7f85fb43a0f6a512f78680915e61d9154172925e3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWU2596247.