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 0x75437466f04f00708bb31c2b214ecabfdfe7160802e0247fd0c123578ebcbc23. 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/695255e2-83a7-4ff9-9a43-0c486573d685.json and https://artists.proofprofile.net/proofs/artist/695255e2-83a7-4ff9-9a43-0c486573d685.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 0x62a892ede8f4dbb5e3cd2b2bb247f6a981a37e5010bbdcdc2d53e662b73b8a43. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZFZ22446433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eec45bf950fa87b777a149b639822e10b43ad3416589da55e6465124187dab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZFZ22446434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c4aeee704e3815657ba0a108178a8009d7b7ac793fa8fe8d4afbf225473528. 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/QZFZ22446435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaa28cdbe603c48880a4e1e5bfb56297c64e26947ee928e8119becf44f2a0d1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ22446436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc377474fa750e55dab16e23bf3fb646d90fb4b3f8dc6c0846adcdf32f3022c52. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ22446441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73497b0da1de2198ad3b2a5d7a50670828f7092f8e1fba5489a52c7586890f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFZ62443425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f10b938fc1354bedb8777c1d3a68764800ddb02c52388e5038dbe8c6fd1a81. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTB62546099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d2d141f82008a7927909e61f4e17c5b94705c6f2af389d930c521cb9fd8fe8. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHN82476150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd210e8c49eba458c16c4cc67730543fe7dd740631f5a683cda5761d84293e1a0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN82476137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933f05bef9e3c000e55a2bedfb1465304d73fc1bb547698ddf2efbaa26e255cd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZK6Q2476895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedee575e044cf6c264adf8a4b0d2316fa1875f755234613d083ca17a9bd0007. 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/QZMEP2442466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc27d030775b58985935ae9a9232c8c096e0107498dad01badf31f8717d869f. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZNWR2408630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf413de9067df3c84a4dc943dd12f2d33d79017798b126f7b8066129fa13d026. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZNWW2414749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dc844ff61dea180bdc082641c924b94b517ddd4f2e6e4411481a98842b71cb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZPLR2445607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae68179e0fcf5dc3a09b42016e41732ed55bff24c76b9ed9b40255357d12ace9. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTAT2405052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d8187268ec34b05f3250a7754b553439415296e014f9c222d9c0dd0ed29786. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZTAZ2404965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eecc4e0d257fb74ba5b37ec1e8e5a72b2291158a91063da041d1584641cd149. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB52421680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0f8e4ee8c816780124ddd07ffd83f27362ee946975ea48bc5d6336b89bfbd4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTBA2443481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffc166328bc047b900b9fe5c0a4757666f5c49e6656faab9a8a8c7cdd24573b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTBE2448106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e66af2e6e4839016c53210a1e472534bbf79e45dfad31911096bd6c4f8c88. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZWFH2418520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6877cd646848f47c9619298b8121d4c9340dcfcbb496c8aa748ed7d598d47ba9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFN2437695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc3847df4bd7eee5688b667796b90a9fe9f28e8fe29a41e02effc50251a4fe5. 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/QZWFT2485880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0256b58b8cec5877ba6dd3b462cbcc4a696a7a9bfa7b41f81800c53ed0142acc. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFW2440437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47b161448ff94eaba53ece18ca965b9a0be066efc65083c56c9a4ad2710156b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7P2452912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754357957579cc9dca8073f69261a5783572566c680db718545a34218d26c6f6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7U2465946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbebe04bb6b437ba6e2ef16e751bb9dd606fa97947ef6f400adccfdebf8c7d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7U2467974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528602f9be3bd5d41343f05063103b6c2c58600f9aff46d0e1618bb0fb1082a0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3EZ2493036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1e1ff61eee899f63ba2f0220470735e852ce940157702cbce1eec15ef8dcdd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ42564964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ff7bc9978613145142a8d0845a139bd1485783bac5ebeffbdcf39321000498. 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/QZDA72513889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe180010f1cfe14823d8461c1f185173d90bfa771fb1d9d9817e983625f68c4f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN82558044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe155fae406c17c6f11e7a684ea08588d8bf0c0c3a32e750b765cd9c981142998. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZMER2595008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267db3c89116096c0a8f5e5dc6fbbd132d794467de3fae89d8da648bad341ef4. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZMER2595009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fedea7adc129bd516dd7a235a744a3322475c1f866c5dd9e0519b12de3bda0. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZMER2595010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760bd64002037f0eb39ce7584b99f49c30535d5600573d3e42fb58c0236ae9e6. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZMER2595011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb587005f3b0b390f6c07236582ae711f3557ae37afa420ce4da698e7d800278b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMER2595012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4447a802e7457e82b7ea2ca88d3f99bca8952eaf810df802faa72b135e175f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZWFE2538336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057a8e1a90841b51198e17020dc435683e7657001c0ff72a49e3b1e98770c576. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QT3F42545972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1022225a848377425f9636e4452f47034d2a263dd0f1e8be02a7c7015db7db9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FC2522128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f98b63ae4bc2f26cfd03a58448e93af10b02ea89066c427075357083277bf9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3FC2522129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904824897a7fa3cf788874423380cb7ba111bb473bda073f47d5c6d3336305ff. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QT3FC2522130.