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 0x73ee3afc26d6ee8c4f1b0b12c70a88799fcbbb4aadeb1977f67051446eab5d4a. 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/d0fbab94-2805-4830-89b6-adf7879f1b1f.json and https://artists.proofprofile.net/proofs/artist/d0fbab94-2805-4830-89b6-adf7879f1b1f.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 0x34f07e1d8e3532e0733785b83aefb460f6a441138ce206660f4a1215e8c7a163. 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/FR9W12007146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cc56d50298a879bb96a29da20bd0b50f3ad4e459bdeb49e784e91316ab3f62. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FXQ692100269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67f15c0e6b38a785d3fd8f67fca1251ee3909a8f85e453997d685606216e23a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/TCAGI2245786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797ed0579cc0d8164b55093234293f9e31535173bab2635d1837b11f23383004. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAGL2298768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eef8bd1f0af03c49722e79b9939857511b61dbc687267295db650d906eea493. 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/QZTB92220590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8211b1b0357ee9d9a04859de8bea95662b94f362c4dab8f9672fe28ea9062a17. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB92220591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abe164f26993eecaacc03cf6813b259f236c9657ab77a0b54e2ce5baaa415bb. 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/QZTB92220592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fad33af0c988bb906b929dc7a0dff370bff47e8a1c80866f0d351ee83b9a8e. 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/QZTB92220593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16b8719311af8d4c750e9337ef70f129e0dd162a2e50b3dbcb4043a5eb247d8. 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/QZTB92220594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b42b339083fe70aa036879029fa8e3b6b100fbbf6893926e2117f03f512636. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZTB92220595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654c179c5fe9bcf809f90958b5744b1c7b3fb93659f4755120905b38a53156c0. 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/QZTB92220596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb2f774f4cb2c757745fd33bb75bc4ce23d3b44c231bc6721d4bcd012490f7f. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QZTB92220597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8de710b586516f0bc4a80d0d53a973d84e4f6412c16f2ffbaad89570d8bc91f. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZTB92220598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bcddfbd942d32f2f5c6a916b6750d4aeb1ab2b51cf0ed1fc3ff5f2bb58742e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTB92220599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c0578fc0121e0e7f1ec8d1d431667b24fad4183c894cee20e9ac89ba3e4948. 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/TCAGT2381190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61201008bd652ba0b320b99491f67006748ef940c1b71010d006e422f02610b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA72335757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c06a3d0235a85629d26c4832bc6c9c99e9fac245c603ee7a39a1a2f97acf9e3. 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/TCAHA2381313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e976898000145a31fcf96234465a4aef7bb7b0df7f5dfa7f703b91acd75025. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/TCAHF2340031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedae564b886c2d1c588e427a7859ce1fa34c3ce9f902c3d8664c31e0c6ce759b. 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/TCAHL2348785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0f55eb39f8bed3bfb5eb90c8b439a6175ed04a735bc58ca1a41e2c1e9ea209. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAHN2303653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d39bc98a209185bc5ef9e8a9cc1e1ce22b97051ad63dc3758d3635545ab26e5. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFJ2397300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955095c71fbc64f268611be86417a4a8f5a1ecc8b3baa9e47cb590cc68fa4084. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHN82410255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ed0454126bbb8fa5e6963e7bbeec7e886a9329975db65d2ccb9f95babe1b22. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TCAIP2424870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3aaccc08ecadca910a60b1edd375d53ad878e9d542e33abff182c5e2f0af52. 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/QZTB52425263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce1b9e24fc6b66de9a6723ec2c8fce8a1df8655da8d33ecef180730d85242aa. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/TCAIR2439788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab4af7c1574ee34e385cea31d2a4c731cebca8889ca5d8f8400a4a48f3c8be3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZWFJ2491509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1785b2da72ee6a7a8521f893ece2c9423aeb799b7a2653c075f8b1989f111d75. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZZ7S2462178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938ffc05fe6e6ac8408460deb28a7c6e92dbe75b020e12ac175998d1c51d40d3. 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/TCAJE2544145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6999e30daf83df145e42dffa2b60200a08f9af81a2903715c7b4e8816e2b819a. 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/QT3F22462700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f28d8960481a76d6042b8aa03cf324729d1f69918035e381ab1160c23b84b49. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QT3F22462701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00b0604cbc6643b219bfd9607a323aeb2fa8c2620311327d011cf30d47219c8. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QT3F22462702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6ac0debbb8044be6aad306b9df21ab357a51381ef4bc4d34cf78a043e9ad8c. 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/QT3F22462703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d02428aee2adf91458d004d457d7f48872c225c9c0c6687c87d39045960631. 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/QZES62530546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fd0e6bc700d0b859b1a6c25450cfbc78788a4206f93416dd098b728191b10d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNC2557961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2031587570c28b3f41d69362cb2d6ead6bd9626ef69cafbdcd423d3e304ff464. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFV2558260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e5d7907b23eedacb23ac74a62b27fde0615725cb4e899078efb9b337acb1c8. 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/GBKQU2378870.