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 0xf9e038565fdbc5207c3ab27c778b5f4a4c956af566af49820ba26c67d9fe58db. 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/e361f1b4-c670-46e9-af18-92b51ef745be.json and https://artists.proofprofile.net/proofs/artist/e361f1b4-c670-46e9-af18-92b51ef745be.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 0x0a705ddbc66605d251e37a8546365fcf7f810da79f09d0c7717b390213635b1f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/FRX762199260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2f4e93ab9ec8f4b0ff4186192d82c3519174fee1700fde1f8f592fed1416a1. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FR26V2070693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7960e35ea9dcdc6825ca92fd63ff6ee06b1ab6a501a76da6df885a037e70e43. 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/FR26V2070694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2485d4bd3090ddd8c19a9a3d3556270e490255e14fa6a4573752f35bd72a2e. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/FR26V2070696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ab23d517fa1ee52f7f2d3b08b1f4d013bbe6e94f47462a6999a7d312b5f43. 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/DGA052047248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2219af6d5e98fc08c741617a22839212525c911d23e472a1cf1ade61b18b40. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DGA052047250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade7c665ecb0899042bb441d59bf5c32b30e69a96642389943a16471dea1709. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/DGA052047251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7a2033e1108b97cc4e275df32aacc01d10caa785c53ac3b48ae996de290bad. 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/DGA052047252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125ac202280de7cfc9c9f548cf5339075a5fd59bf81b694c9b09d8440ae198ba. 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/DGA052047253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42708bbb1b14294b22e6f80fb1715b8ed467a2954676930c18e9e893fad9ab7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DGA052047255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d0281d39e671d16b463f3af1128f0b630d6ef5aa48d762ca17431c10d7514. 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/DGA052047256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20572d3f54c6945568dc78923f3c39b784e2c31a7570ea2a16767e5b2eec2a8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DGA052047257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f83cd01f1d17996be0a31ca262b64f0b88414a0d9144aa70bb812f1951f618. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FRX202121309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663a4f4983da513cd9fb10338172f2e9a0e43ea805b72c4708ef0562c7a805ae. 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/FRS182162840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efc01c1fa96bedac1c166723256493cd012bf30191f284135e669aad352de73. 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/FRS182149164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226c0cd4a7b749c0267b6ad05c3d5cc415b847bb2e1276bbc8ebfb62473202e8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZN882230938.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd128b01e7d13938d60ea4b88b7616e1be2de671a54266e4b0f80c17f5669bd1c. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/MYIS12200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ecf2917a6765f2f1846afde918bbc0658e62fb33971243579be307d5dff18. 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/MYIS12200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee883ab64e05116549cfb563bc5245967f0593a0be533d3b3989eabc688c389. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/MYIS12200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2ab2180848b622e3e5cde04a21b8db503ad7558debb9fe9ebe2f50c97e20db. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/MYIS12200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd15720efe3ca7d0ec14a38c890f670a1aa35f04effa69f873f0dbd56ca70257. 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/MYIS12200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e2d5d293ea29ce810ba30d43a8fc501c23689bf81a65f29cde6e5f3f571175. 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/MYIS12200152.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf095dc78bac88f341b16e3d40253b0344e2fd60003df179ffe0c931f35c6b86b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZN882336287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b677ccb7d370b487a3315915616cee9418885d7eca80a03b0dbda6fbd6e4335. 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/QZN882337121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30af08cc3bcf0dfb1ebd3e4db1dd11acbcedc0ae5161f2b3fa93e6866ec7aa. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZN882337161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa7d99eab8da71f83fadd7c7ff60eb03f3c8eb55250a6f05f89de0c7bbd5b12. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZYFZ2303366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c426b958192ac52a8e4523a8e81e46b3410d6a709ff663c8fdb2200bbe39e3. 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/FRX872457792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d10dd518983bd1ed5b5b37cdd08fa43f1825e10037ccfaaa4b21a04ca85b55b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA062482583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b5f1c9449387436690d6f315b146ce34a7d2f07b5eea76ee77b57d0d94ec2e. 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/DGA0T2456883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07233a218c0b3e621d4727c215bfb44a983c07b36c81805549df9caf03f8b97e. 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/FR2X42540956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c4cdbcfc18dea89c44232351e81507f39d754f63dd5050eacef438b2915ed4. 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/FR59R2592401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed942ddce042b2fcad8dc57e10a5528984d6b22d8e003613ae4f90c9d8462127. 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/FRX452546094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457e887736b785ec3f12cd166e0f55270e69982e8e3943a4f7a982abf484e582. 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/FRX762548938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b2939ba415df550d585629c0131dcf8039e78789d9c5afbcb68f00a71cb6ff. 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/FRX872505003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88374276e84602f4b3bb16c4fb480195fd01ff5a164ebaba24f5df7470738f4d. 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/DGA062526610.