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 0x984950218e3191cf425922f93dc5de5fc44cd2d30381bb840edb134be72c578e. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60d77d53-77a2-4450-bacb-a48748a8914e.json and https://artists.proofprofile.net/proofs/artist/60d77d53-77a2-4450-bacb-a48748a8914e.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 0xdd4d1505f8fc1057fff9710996d1097c6a21786f2fa1e26267005959752f6e1c. 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/USUYG1373377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b12a37137e3c7db5693eb1d3af1a49cb916204995be4ceed27fcedc3e82ea01. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USUYG1373378.
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 0x514a4e5d1d866e3dea6b41eb67c0f34578405622736936db8ef3c7d12af566c1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USUYG1373379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6662e5be153ae86102012c561e59e8db6e1314dfcb403e0a1114b9c1d93b3452. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USUYG1373380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243a255d80ff112916c7456c27e549a61664f0b8ddb47a70735fc801991f1404. 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/USUYG1373386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb16a66007977783a0108fd2df5cac3ccb226a40bba4081fa7b96f1d9936360. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USUYG1373387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9127c984571b4b2e2458466e280bcc66c4e383b1a755973c36e9f63c5582b8a5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USUYG1373389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc581c1b1de62ec2c128bbac3ad0e1a1efb6407c13ee35aaa14de7c3df649ce8c. 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/QZDA62185679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0275fb3f26341569d46815a9c51437e55a6b995fc85ff50b75286ef90d2b9db. 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/QZDA62185681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3806b09a6fef41a09b659da913a0d72d862a336909a5a9a225dca40ae82eca. 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/QZDA62185683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821267339bcfb188326d6376c1be04c7cdbbbca50d6d2b5113eff8d51bc06c98. 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/QZDA62185674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd623bf3725b901e622aeea365df73747887a7e208ad14f4f9389b0353d2dcd. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZDA62185676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce2d939bae721cb42123704743ab6eff3304acdb7b5e6e0cb201b26c3e4482d. 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/QZDA62185677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64eff69dcd40216c176b27c074fc336859706950badb4f256f7c28f6e7c0d3d0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZDA62185680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da385aad7e9377460cafae633e668118e149ba55ecbd19daba759599ca8697c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZDA62185682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bcc0d5435f48b86e343aae8b81f5dd04493805b8624e9833d213747a1b5062. 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/QZ4JJ1937402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3de9424dc954185645b2beedf3e6072e93cbfcd9062009c0e206df34bab0a56. 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/QZ4JJ1937394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb884a97f418151c9beaccb2e69aca2d5e9e7892042c977f3e2791b189b0113f6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ4JJ1937398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d1fdd2f547f06d0682634891f4de1207366240fc78027e114e8014a302bed8. 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/USUYG1522532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e008ea347f20ed4fababf67a5ab5b37e257ba388c404fb13b9ea3e15057425. 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/USUYG1521257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627a1a2ba6fc60217787358ee33a143eac485bd015a0ef70aad3db4d360dfb6f. 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/USUYG1519096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156182ecc5398ea8aac88112e372250c33a47d8b0bf9d6de7180ca2c07c13342. 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/USUYG1421805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed040ef3c13880a3ea0558a644806d2f04aa582e058bfa18edd0d9e919180e2b. 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/USUYG1421809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d7e1a824ade936bad6a9acf9d576b002f10760009c5aab91ce68815e7c41e4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUYG1421808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe880c8f3235dff5525e63442eefafe8500557ce3926c1d73bf8117a4ce1ae4f5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USUYG1421810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab9f5c8af852899345745a66f759dd5e7bb1216eba3dbe437103ac7f1422211. 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/USUYG1421811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817da499826c2fd2b122abaffec40b17875f635c2caabbe9215d2bf2bc6ca87f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USUYG1396404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde6d43528e43b47443bd05245bf62216de63c20f855c8308f9374536cdbadc. 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/QZK6H2073384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1bc68c1c59384a4d739400cdbbe265ca42c494ec6cf9ebe0adc26707533306. 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/QZFYX2070706.