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 0x81db9d72133e4ab512f7ac92c30dc3d79eab2ce7a159308d04c49d83aeac86eb. 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/bd832b56-6717-452a-969e-f623d3e093df.json and https://artists.proofprofile.net/proofs/artist/bd832b56-6717-452a-969e-f623d3e093df.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 0xa0b440765989a42aaf7227d25d737394a1c37f42471a4c4f2337912809eae26d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZGLS1913564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53831636ebd5efd93ab41b95f5bce68c7dd381c4dd71ef76fdb242288f28492e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JMA271905482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698eb7352c52410b7cc71f74c752a50d0f426248d4fd8ba0834fe8d818b05746. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHZ41920963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb6cae8e0995239666bf8cb7b0a456f7392b66ef05fa0281cb89b818cc97d21. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/US7VG2017411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a3df87fe3e7ac90e9863297749ef36d1cc4f7d5019e40f88a5c805c2a4431e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAEZ2030735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eddd592256036a6fd98abb9edc9810a303918b6572f37b0d8535e8079f75c13. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QMPAQ2013002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d57fe1e01656c579a2f60d10211800aafab04b1da153a90d57be36529fc91. 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/QM6MZ2100540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d57fe1e01656c579a2f60d10211800aafab04b1da153a90d57be36529fc91. 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/QM6MZ2100540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a92a6db337b7fcd2e7b022921c8adcc7241de491a146064ecbf313ad25a056. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNJW2172649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efd8ce2b523ab57e57aaa8ceca69cbfd3c0892ec949d742732fa5bc916c9c81. 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/USA2P2143370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5598f1113ac0807f136dff210431eb86c8269bbf96356baf2095727eb4611c4d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZHZ62251905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5da6b214db1061f404d296385b8c632f93cc1d2d5aef5f61773de6389396414. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNJW2264581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be253d294b3197161771d031bcef86a95f3f1eb98c9636c4b4e319b4dc8ece. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJY2244273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6009eb505f8b0f35f23294e92b0c8a9746f4483e6a1d0486178c9e4a4c7b7b29. 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/QZTVM2240051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8678bd04306b51d8e344d063b24d49eedb1407a8f1bcb5077dc53f17ec1811ae. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZNJW2349340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd288dd15ba6c60d3cf34afccd9b041f94a10fb1c21abf7b298bd397cbeaf01e7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USYBL2301300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286dbcbd7bc4888f6a5862e5df43436506dc5088133cdb1eea946c47788829f1. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZNJX2342569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f03eca19d03fbb290bf418b22fea67bb185af7e09f8bb79af07973bf34709cd. 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/QZNJZ2347187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d220aaaa9dc01a3dbf7a74f940d66906895c8afb8ace1efb8be030b9c2cfba. 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/QZNJY2382308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94e49cb8a9315aba8b4ea944eef44d6817df13f3ae59ef320b87986bbd4024b. 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/QZGLS2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7bca6c75bae756dfc9fffc32ee1b1ff2deee615112318646aa8e9f019fd1cc. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZUWH2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0f9a83bc5ff6caf28d207bb2d3b88c4bee32915845718edb9f2fd895aee69b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMBZ92440112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636385481c42698c60850d16781a71bcb9b2b32ce7f0ee55a508329ff22f4870. 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/QZNJV2578814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5afad09a45a16efe1f147bd9613b35e43f9d76d0cda59bd4ea5a774f4f458ef. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMFME2521165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04512b398e3f748edbcc694cb64e5fb1cc0de7d939b99bc28d45d8b028a2f571. 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/QZTPX2552190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33f8d33f57d5e4cbdc43dcb8a06c51ea7462de559b33f9bdf51e047e4f8ee9. 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/USAT22404327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33f8d33f57d5e4cbdc43dcb8a06c51ea7462de559b33f9bdf51e047e4f8ee9. 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/USAT22404327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2c84e912afc713743bb495ab2389bc39c6104e0145f4923c69e7a44a7b1127. 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/US7VG2372271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec08a98e13c227d0eaa9c869145ae53515983413fed638926239b75065f40ea1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US7VG2372270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0355a1e995ba1696f73185d9a977cd6a6ceb57a39fbb19223031aac70a42e. 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/GBRKQ2498411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7d9b76ba3b2199e063e7e0f3693643c13c32c3e728eb86f3f8b374f3b55c3. 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/QMFMF2360314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d6c26fb87aa238c49c2095f3697c20f2b61ce491e110bef2a394fa5557df65. 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/QM4TW2015065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c39f224331ddb4202dd4f64f198746799c84b333fdf274433e3bcf09a080308. 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/QT47T2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cda85019bceb7283d8bdfe1cc59ac0fc2fca18683f098ac95b29464cf4314af. 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/QT47T2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2be6da85515a4714041d5c203035d2fdc0c12c933aa08ef4b35297d58b203c4. 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/QZWH32400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2be6da85515a4714041d5c203035d2fdc0c12c933aa08ef4b35297d58b203c4. 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/QZWH32400361.