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 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 0x8ec59843f7203aaa5c3905c3826cde4eae2e3afe6230e6b6f0032a464d44978f. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/275f7cb8-5731-4e61-a5e4-091cf2680004.json and https://artists.proofprofile.net/proofs/artist/275f7cb8-5731-4e61-a5e4-091cf2680004.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 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 0x6131601dba9540e7a550e36de4ef727653099734dbbb8ef984a6b5da9fc5bb36. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZWFP2401947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068bdae5c7c24ce900fa5770014442eb670d60777f9d8110e000966ca120aa24. 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/QZWFN2498496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4181c60d1245cfbe26c35026db9b4b9be523c8769c718607cfaa92c6ee3bac7d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZWFN2498497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0a8dacd4f94d22208f292d449015477c604e122af63ffddbb03e60de462484. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/QZWFN2498498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c950a85ac227226048f7b34cb17fa6a4bc8996cb308385e48c8e71ef251deab. 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/QZWFN2498499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00246da107f3a833b41d92fdf1de15b867ac1f8e8ad3c9ea24987c4ca831b6b. 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/QZWFN2498500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd207dd2b974e7f32dbe6f21994eb1d7004e33fcc20546ab589d8624a9edb29. 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/QZWFN2498501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02fe3e86b44b6d6ed0f2fa26e79a4faeac7d8c53189e19a2bf4332400fefe92. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYY2524796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6580fefa3022c16ae037c85f3cd0bc9210610860f7a4c305b19711460ec03b3a. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZDA82556268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd86fb389e2a626a3efb4fe7c4168d58509f6d4f01f385a23bee934649083b7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZHNC2550980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e71f6ed1231fab879d84ba0dd29758042c465133fa08be6a6617a35f16173b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMEN2501766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9a4857c9c6475e4bb33aa9b4255dbe8ff62a97d244f46c2d2885ebb5305321. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEN2501767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac814defb7db5890d74e0fe6660ca08a90861248a4e115ce2b4e0fb45d8a79ec. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZMEN2501768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216e8b79c21ddaa356deae9e23308b10790e7e88b267c51a7856bb82d73c6645. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEN2501769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece35ec1ea145b17ddb1914977338554de04f55c21ad5c00fc143e3649fc1cdc. 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/QZTAY2501481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2562a134f7d5c66e97dd5f8d1771d43b66754f25e2153179e4ad212b47375665. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAY2501484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8588ac2dbeb96d0820adbcfd0ad5f7be07a211e38121b93b309465f524cfbe99. 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/QZWFN2542011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b43ae5d73b59991e529eabbfe9839cfc9bff6da948211be1623031aebb1130. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZWFN2542012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9cdd20cfb8391cfb46b0a316306271cad5d3da87b1eed7a0d32a4fce9def6e. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZWFN2542013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a5c7f18dfc30b8aaf4ec7492c05456ea5024caedbaa73e2af715aa4864aa30. 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/QZWFN2542014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642e2413d2919f310a149e4793d0366e6e8ab9354fe781e543b6db674d87acf6. 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/QZWFN2542015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f52932ef032f203ff297ebeb4ccae1c33af318b5e8baaa8b71c297e461fa72. 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/QZWFN2542016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877607671bca74b2652c1bd542ec39feda225109181c341089f0f4eeb137a5f2. 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/QZWFN2542017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973f721b2b4d1b9e48fa3b25ed282e3b6fddb10c20f2978ae02a69be4b542e25. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZWFN2542018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2966334222de2eba65f1d1c63f78e2df706fe35c98ff5ce81b5d80d0ce241434. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZWFN2542019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c3ec32f602c48df55f3b6b9befa2d8960e6f35df09a5b95541fb5d14b6c8c5. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZWFN2542020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6593614a30b28deb07b08c5bfa737bb23d439b815095d2ff477e63a204e722a6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZWFN2542021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bb2318b905578c9f325843f5acec9d0772db0483ee69c4987d8c9e061a1577. 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/QZWFN2542022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03545f432d8fa83a3f04e90d0316e03ddd00826763e20703afcdbf54a2bee636. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWFN2542023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f0a9f098a27ad3c6c3d8fbecb2f469bef4347383a195e6abfbd18f9c53021b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZZ7T2581975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7856c9568a79ab00893209b0ef4d9bfed3e033dfe39e86e966b7f6fb2db7a544. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT3EY2592192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3310f40149ee6e9725806f2c6d957e67b198d9a09e54c68459ea07420f59142. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ZBUKK2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101a79b34c088d7e88a243dc3ae5a5123c12ad88584c5090b718c04594d52f48. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZN882432119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5728384e4d14d3382ad9979ac16dd94a1ebf41435c38208cc136288dd9c5946. 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/QZWFH2428812.