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 0x7db0a3e5667015d3caaac1e2b1f6c14f319ad675b7435b5a0bee63fd08225320. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3494309a-fdaf-43d0-a683-c030ba29e0d4.json and https://artists.proofprofile.net/proofs/artist/3494309a-fdaf-43d0-a683-c030ba29e0d4.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 0x6ddf2d3a402f30d66b826a4c7a241aa049d6b47e77781fcda52d4ba2ce302930. 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/QZHNB2390091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e91912e14eb68a82299931f63b032138d793376cc595be6dec1bf037475578. 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/QZHNB2390092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a893caf3fc72b2d2e47c1fdd8c66f71b4fa6c30e3108d0b68d186409d78d921. 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/QZHNB2390097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7c55831035cd4564f414476df003422195df3f9173701915e5d0cb35e3e310. 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/QZHNB2390100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcb9811e7b519e1d3f2b9836cc8d0bf156ea96b30e0560c5ecafdbd168f490e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHNB2390093.
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 0x55960639611491fd3acd74c8b9cf564bc603d8a705cb67d5735bcdbb0edf5dc4. 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/QZHNB2390095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2afa52cf4ac9c038feb18633b81ba445ed79ed59a55dd265b2dbd8d1822ec28. 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/QZHNB2390096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec2b213675299364a1d92d96595abef3202542af51047de49fc0daf075298aa. 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/MX2832256982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd70d0c3a57b2765f7fb1c4eb3598dcd610524f2c6c671a0d912bc70b3261496. 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/MX2832256986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743f07ee2365ca3fb6428cd024b362a0a7ff073272918203733d433d3e946569. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/MX2832256980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb994b2b8ee310cd0b0394b7e95dd9d39a93a9918376ab6d8a35a5c337fef26. 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/QM6DC2087060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75070a9aab0b53456cea7420433e76c5e36e480958941b83fa354970ff02fac1. 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/QM6DC2087061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c545b67168a0b33ffa6c5b5f2c71f7c1da5f475024256ae10aec5ebd433a09. 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/QM6DC2087063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bbb51bd5d770d7433a81d9ea013f27b9e53a68f566ea0f8b46b7535fc4e80f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6DC2087067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b679bf9215feb0c30150c95d7ce74ae53fd463c087526be327cb27bd4a027d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6DC2087068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a95babfafbeeb4e35095af4008b1f72ed1a441a240dca36441cb9f467cd265. 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/QM6DC1911110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b44ab8b01bfc7608024651318cee7c6669ee95d3489403d7fb46f459f69e8f1. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FR96X1948972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13274d1a34aca45f217fd1f5f07777857be262506292121f88e91eafcb897a9a. 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/FR96X1948973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1080b41cb646020fe06c541f13438ed0c7d3373621cd3b006feb017dd6902ca. 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/QZNFJ2302846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93752bda7c7a8ecbe2681bf0fb0ab085592ab22fc412e1bb8228b18ca6a6eb81. 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/QMBZ92395383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350808a6a947ebb4bab47a7b8dc4fe8363a1111dcd2211e878a52e19c1e33853. 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/QZNFJ2214529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7feca9da634a669e1ee096c9e63a06c04a9cf9593b3bb3b1b5dbbdc80f3a95. 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/QZES62364142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63a29f8ee5704ee5d2d68df92910d83a0af76243f83993114be2b4f90828de0. 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/QZNFJ2209365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec61f64dd6dde3109876d6695020e2abf2e7c9b483db67b6920023f664876df0. 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/QZDQH2269158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3732f280f08712fd6acdd9022603dc1b4d0ce80c013e8a715706c7e39db643. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QZDQH2269156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe758ab240f3633775d0da6e449d8083fe23cd1d9a086047fe622fec088c26b1c. 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/MX2832266769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af709d45b95e9419f5b749262b0c3296c4fdff2ed81ba37f5257ce680e6b615. 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/QZNFJ2203425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56533f7409658ee62a913ab23fa67f7113d3265e77578b594ff7b4e483ddb500. 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/QZNFJ2203175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1267f588703c95bc39cd32d6e72d130d40053fb8802485e07f9b9203272fc731. 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/QZNFJ2118509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fa15337656aedc210d6cd657af11efa0511be9aae31a8080611f1254dbc59a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZNFJ2115160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a5d211cc2bed40d5c9cb61b600a4ed71c2b10c354d285eb3ce645ab08990a4. 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/QZNFJ2102114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06e6baaa7cd35a992b52bcf0066a720d9accb5da02d83ac8638607910914ce3. 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/QM6DC2091422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186bef86a6c1503449fe2ba7ca4013e4f5947b565a4f57c2863154496b12ee77. 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/USA2P2354734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3313e0acd6680b5aebeaf5a769eb0e5cd9bd147d09c7289ee7332547b8a9d247. 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/QZNFJ2305812.