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 0x26c3fec63ce8a60757ae83e2a645bc78204bdce2629af17b539adde10b1e63d4. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c49ada0-8006-42c0-b6f4-c983b73ce6f0.json and https://artists.proofprofile.net/proofs/artist/3c49ada0-8006-42c0-b6f4-c983b73ce6f0.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 0xc58a3a1e9ff6be8fbd24efa86c763798e5b1111224da1dfa8af8f8a555e184e2. 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/QZK6N1975090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d993e154bf5241652ccd4f84c3c05a14c17e993cdaa8b40b9c711e3fcd038e3. 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/GBSMU9509002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d7e49bf77b4ee80fdc678b777fa6066b083e2c7e531927394ada3e479d2ae3. 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/GBSMU9509004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e357b44191c8450cc73317dab90109b2401498a94c0ded9494270da34d0aeb. 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/GBSMU9509005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae7d822b1717f422ada911a420c7c72d4d941873d81994977a455b7cb877c70. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU9509007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531d6a34e697c94bcf6f580a9ca88b631774b461a4d074d4598db2937fbb96d0. 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/GBSMU9509008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc9fcb9b788443b6243ddcdbfbf2062ced6df6a83e344e1e9a821bff4de117. 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/GBSMU9509001.
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 0xd912935e2e0e02e8cdf4d4ccd215248e9b120603497f7ecd1acbae4e476a4033. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/GBSMU9509003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eebd9bc17412b803c6f445798ed4d4b56b302fcccceb9c444bf0284f99303e. 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/GBSMU9509006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0568611998b4a65af33e1ed1377a3395ecab2ca662b45d855829b72312225f1. 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/QZHN72587757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8b0d04954b98915f5fdfd43c5e448495a3cedc4a64bec8d95b161d32ba795. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2464004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd68bf73758884901ec5a325e9cfa807f5899d59b21f6df9e5c2f323760bba6d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEZC62454927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117544e042979fd2a17eddc99bdaf2ae00f5d9a993c0b47051ffb6575bcede3d. 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/QZS672444953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0880c8b7357bd1ea99747ef90d39938b486ee2da8fd01c9280eeb28d515022. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZMHM2457176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404905e9b953541a4ea9930969011697dd22f0720ab111f0e3e2e25a21ad1f4b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6F2475311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e2a2f728baed2b065f4dc3bc37843aa6a155364ca4a9285d7b49b41d25d31d. 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/USA2P2427371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01e12038e361a4e3e6806f75d54f6f77610aadb32dccc324728f88c34975d98. 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/USA2P2354635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652aea300fc8363b0aaa432e8b822ff9722ff367b4bbd15879f20f5309c30e72. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA2P2354636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b14aaa69cdb2139046f6a726469f1651840c7598deade1dc367550c700450. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USA2P2354638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ffd2742667137c3903fee815bae3d855830c8b57b71218aee358fc368c2d5e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USA2P2354637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e08d020a584d2d57d46eee626345b8e12a17d149aeab556779e6ab7bca29f3. 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/QZTAX2335178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2043c0f8dde64cf04355ee68d1a4d3c2fa897269a15e47c653f8d0e3d9c901c9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6F2380267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9d9cd015a43b3a759b5d4cb31b4fa7d4cb613559e5ec760e77e472adbbb214. 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/QZK6F2380269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb017e3abe38e14a84c973716a359dca0b7dc617bd51a9a81e8408cec75a0219. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZK6F2380270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70607c14d3c8e884fac0cc356f4571d812545be27fdcc726baeaf99725c9623. 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/QZHN82360582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec5320ebfad4688a0e58511fb840b94d9490c51760bc57c2d78c3d819d77623. 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/QZNWR2241941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebe7df7a6d75154289e9b094268291085b335657adc0fb954f510c1b6288bc5. 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/GBKQU2217296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bec71ba215d02cd7b17a46316b576254469008ff150393ff4169a5918e27c0. 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/QZMEM2195301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bd3f3f7442739da2f2e65e796585c795b3ed419f2292ec9ca8dfb759af0edd. 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/QZPLS2010388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe385ea93e1b01db9e287e3a705b29a20b529ba90b55fe0a9e765d28bb86122e9. 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/USA2P2044784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b547864520e693e598d8da4bdb1129f0158cc22b2b6883ab9362723579faef. 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/QZNWY2097268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862dbcdc1f4da968fb7027e2dcc5020d0a29ad54fe06fcdc11e30bdff53806e8. 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/QZDA72092651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e2a2f728baed2b065f4dc3bc37843aa6a155364ca4a9285d7b49b41d25d31d. 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/USA2P2427371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf00b01f1fe067fba1923cf67ead76455e62fefa26b2c2eea106c67d82648b20. 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/US7VG2533443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2866fe956076d8a2c32797e60c6ad1ea0b522878319c72550cff790891d99c0e. 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/GBKQU2075497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32e1b0aedf725a6d45c5dc7f6c55ef4531603b804aacda9c8cf85830b5dd76. 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/JPS802355063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8b0d04954b98915f5fdfd43c5e448495a3cedc4a64bec8d95b161d32ba795. 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/USA2P2464004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2d7201ba21cdf00e7b532f48b3266bc58a4c1b8a5e80c2934e3c9aafee8c01. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBSMU0090679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b24cbaa526e4702d5716c8fd47b699db602dec8b9272dc35203ee755995632. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLV62107798.