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 0xfc20a06e3908d46772132fd48b8af59ad3717d8cb9665a24bcf217ecacbde351. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83d81d20-cc66-4606-81ba-8a5ab1a80e19.json and https://artists.proofprofile.net/proofs/artist/83d81d20-cc66-4606-81ba-8a5ab1a80e19.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 0x011054dd10f7622d347939303818ef4cd9fa3524d168677b16e478a61430d90a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92339513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14207e15a80abab0ba8e22a702d58a03536aac09562603c7e992fc3bea7522. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92339515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6f42a2ea97be71a91a6193c455de83740f9040d76a819f4fbd6c5f4f8bf9ab. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92339516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5950e256676be71e8cd9a82a14ba1d73ab62b013d4711a5f0375bbe3e6eca6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB92339517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70e4fdc4f70ee83b3dd8ddb22744cd8f969af8ba6e24b6e8c36e3c7869cba03. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92339518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4472dc2b4ffc1500cafc605fa61ac8d7610e9c417fe87b7fa11e120f7271fb4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92339519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f826fc12c8071985af4259b6ea459834d39761b2ec789c4c49dfa03537adc3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB92339522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3bb4ed0e8bd844efe0ecfbcdb9fe368268fc5fb0cdf393265a4e538c61ef77. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB92339523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b6bd0e4f536e93689f3cd3b36bc73d58be3d15e45d6d6b3307f273f8cf7d5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92339524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a47815e8e3e99ec117892e90460add854dbeeecad840b8eef47c3978fd22194. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZTB92339512.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d00825f63b88bcddf444010afae213dc2d223f2360f7e7f4a08e5bbdbc75cc1. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZTB92339514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ac9e799bd93999f6f442a235e594194750cf534d74dd72bbcff42ce2000443. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTB92339520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf727c58e1c1f68ba9484345505dc1dfb46fa9974abd3f7eaee22cdda79bbddf9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTB92339521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179552c0cb47b3c36b05be6a60f53cbd07cf51aba7a7ad4de8f74b90fa500b6b. 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/QZTAS2324374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d748ff89e37ed570827383a551a5d9cf771fdd6d6f17f4fd5cbc1cd37bf27f8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAS2324375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb04e6be99a46c3390d8055cd22afcd7c1e5ae4e648d45389a79f688d4eecd1. 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/QZFZ32324262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f333dbbac0b66bc336f2a3c9bebd4715e58c593c58a704246de84b1c1bb531. 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/QZTB52296254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350aff3565480ea3b59f79acde7f1dad11b239ef54d0ddc1723c48700254ec49. 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/QZTB52296255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d6b1e4aae2a56d9983f4fde2cd9cc0b10b3dc0d8e3cf4ba55d62979eaa3c18. 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/QZTB52296256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85498b185dd8b9c0f4fb3c86473980ca4acb666d0ce4672d988080a62565498a. 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/QZTB52296257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bde0b55b4423fbe9c5fabdf47751e553f93d5f8db53304ff0c66f67dec77ea2. 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/QZTB52296258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad47c07f11740bfe4c73082a8c2a68a152d1ebc39a7f44e4cdc42cde5d7c490. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZTB52296253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91543997203b20d9a1f81402ebbddeb3ebc137558e50f34a8c6498390068e21. 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/QZRP52227592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c97d6737d8064e2340ea433056e91cbe3579355818d07d750e2e3b0af70186. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZES72222139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abfa533494c5a4f8a0d166f2e253e2d84f044be38a7ec9da7a089c2c8d16150. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA52256422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813a8f0546a60dacc1b13693a6322b39e0c9dc769ef504c016c1025cd5010d63. 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/QZFZ62240719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b36c1996bef098625fad78aeb62ddd4cd532d7c7cbfd6fe5dc10bfad566517c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWX2175422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d581c7ff18a67af3fe5742d17350d9686a8c1771ce7fabf93c6dc606262a81. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWV2116806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4516722affc4d915847128bf9fb95a2e657756feae6fdd4077aff8d4cdd87c82. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP52254916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3377df1ebe2edbcbbf89d27d6e82197dce461d841ebbb72fe22d493a8daf46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP52254917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c44bf917d753b96d1be73175692c62a537721b3ab23c0f4a82edcf1d6c6745. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZRP52254918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcbca7ef26046e61cbfe6da8a75d82faa86f706287a26d4566f2719e79f8362. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZRP52254919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575bd931562389c54b04cb984dac65c527831713fbdf8d2a15cab21564d805f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZRP52254920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1790d119b3a9ef30e6c5fd27c337afd8b8b63e81cbcf4ada21ac7f48d904548. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP52254921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975db1503afd2537eb246f050a4703718b47ec5d3c07fbaa004a44ed944ebbee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2448785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061317dffa6fb932fb706b8588a0238355733053c3465b8cc30c69635f46438d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES62279440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a3d5731b6cd7212e0d6c99834de35c93bedcfc1a8958792e2cb4667483bb8f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES72246470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a690a8642be5ddd5db271536bf4a29746eb3a449798cdfea32591fa637901. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN42291549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a783ebeb77362de6a60de3922c90bfe6760af6c49e0fff7cec4e654ca7f7a4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHN42291548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e36f733a2c8b60ac89970446540d8d0b14e87fa731fb0abbf79556c3db7b287. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6J2217923.