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 0x75b37ed3150d25e5aa4560a4910bea5ade8870aa8dda7898cf4abdf2038abffc. 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/a682f345-04bb-44cb-9954-6c9c4b094fe1.json and https://artists.proofprofile.net/proofs/artist/a682f345-04bb-44cb-9954-6c9c4b094fe1.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 0x6990745b2d58b130ac0e394bb09c6c2fc54ac064dae9bdde7f0b3692a1a04ab9. 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/ITDF41700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0eb6999b04ab20250f6f95fffba54dd1b0e6040e2a51f85fbeff54dab3e59a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ITDF41700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7801833a21c43110973bf82ed3972b815154614fb09503028883d366331666d. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/ITDF41700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3e2d331a3320b7aabf61eeef8f583322e91caf71861f08ef1a7c0fbef08198. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITDF41700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411f59ccc82f314a0e404dca42d5e8fd6f30c507601540b7ac12dc2223c7ab17. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/ITDF41700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4875441574b36e50d195fda3350551a594b0e8d133677995c3de11edd3f79baf. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ITDF41700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c861345e0269f5ed15626af38a396e5746a0486b331215eeaec14469bf531. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITDF41800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359b7e2463cb79468c44ede303e462146566364c836db0d27c4d622f3added7. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/ITDF41900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfebadbbbdda16e2fc434ab0f2b40a0f8f8cf214a6fd6462ddff439bb26ff23. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/ITDF41900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef6648c2c4e131dcd489ca173f8eeecea8fb633bbeef414c308c6965204057f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITDF41900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364db9a737352e43c0cfb784c39fc32f28446f40df87886210e1518d0c604893. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITDF41900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d2de5e37e02b7e302618b8aab586ba788804f2bf431c80df7437e728cc0de2. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITDF41900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cf5a3817f3b6c70a108d6833936a7d588174e9034cdab2b971d7991367945b. 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/ITDF41900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c861345e0269f5ed15626af38a396e5746a0486b331215eeaec14469bf531. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ITDF41800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcb2953e6bb615ead94bfe5095b05e577d33e2912e2ab85151af559836013f4. 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/ITDF41900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cab50a05bf73bf3553293f62dd5a760616e3656ce6fb1909e81950c9e0c8973. 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/ITDF41800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f991308a80aeaacfa95ba80d6b4d3624c4ed8e1eeb953b91a29be3d22a87e51. 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/ITDF41900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649fb85c553ca7e41a56c1c1cfb6612368a391d99575be8b4799071801d26c99. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ITDF42000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35aa00338a42591913d96555fc60354fb8a499b0ff7b27578ae1595a9b66889. 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/ITDF42000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45339ced0988da05112dd51296fc17f6460650b0d13dcba19d4923871f09985. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ITDF42000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc92e2a8fef7f52bdf79271989c9615b664765f5432785432eca3ae6ff397387. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITDF42000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7789a936702545facd9f3bae29688dd2440f3a5fe787edfb2908fd62f1f3bf3d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITDF42000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31de3c2b6a38b5423f604a052be6cd08d6716349a48bc26e76d269db411d3f2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITUM72200938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9100ab8288674539a00b4e4bc12007d560005ba900b9f227ae0f7198fed08189. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ITUM72300827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e2584ceb8bdf295bfc936fc2b0c5f2484dbecb9da06a1b17131395647d575c. 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/ITDF41500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b2326c017dbcb429bddbed4a2548956eefab85999d6800d002037c4fa98942. 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/ITDF41500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41e1ca02ff955008c9834bdb21a69781f18cf9d4706d1f9d6bc3961c329bd80. 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/ITDF41500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9b7d77e3f9d9eebb288d47ba5060f8de4431c57b3b96170c0fe9dd44237994. 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/ITM3U2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7158ccaa33b23b89fe3afc7c22aa6c42e1a701213a00e5f8b11f4ed042764ccc. 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/ITDF41900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb7ccbd7499f2ceb99c2f6a92cff68840d7e7ea15212c3054ae997ec7d47cad. 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/ITDF42000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0564d788787f31dedfed522ff788da975f2f652c4b21c25870e1a015481e2c8. 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/ITUM72000920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e0ad307c947a442359281b2f978669edec20c402071f5356dea78f24baa2aa. 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/ITUM72001190.