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 0x38f22a8752d0f7207b43f1d074926b1865caa11e9298d4d71163965e253c6482. 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/13f239ea-c463-40aa-8c94-27a40f076fc0.json and https://artists.proofprofile.net/proofs/artist/13f239ea-c463-40aa-8c94-27a40f076fc0.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 0x4f6eb019f4afd86b5e49ae72d544352825cf4ba2e2475e370b53011f4cafdb60. 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/QZTAZ2254652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa375a0f8f5d13a7ec5196563b700985d8f6577d53024d8f217407d7e3b903ae7. 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/USDXS2103097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3a7f6f8ee581a1ee70bfcb5c7ca08452f38ac940a2991aa24e1ce1aab70aec. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USDXS2103094.
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 0x85ccb9f499a76d6bcf9127f482b1f62c5ba9072f3afc10fbcd1d920e448411b1. 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/USDXS2103100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f183c0421ae77a4c3f0986fac1c3c8b4b112d6590ca805719c2e16fd56cf83. 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/USDXS2011661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07b4c3ff3101f04713e1272e965fece40dab4d5718721bd5fab662c32a002e6. 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/USDXS2011666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd55a5492ea9f01745f3a99ecb82d222550c0b10abfd48686aa129c32e55f9a. 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/USDXS2011662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa171b856cd885d185411daaf2017619f38786d7bc2e9d2b095447119ff298af6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDXS2011663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325c91311f9e42d416dc2ac4a04ae6baa47234516f90c8d4a944d4e295550805. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USDXS2011664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd80bef1b801f96ca345cee6c7f209ff2263214642ad1f81e469c9dd9925194c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USDXS2011665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd985020a17bc17bf5cb4944f20a0fda0e529479c77487da176e8bfa0afce6dea. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USDXS2011667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b30b70d4869b01d5e930ffa29df376638ccb28011fbfd728a6d34d68596120. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/USDXS2011669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3582b66250cd4c934f4c023184477742304f2c270ba6d0994a4781495fbfd1f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN31948779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ecc669b0f2b69e2515efdbc2c6e8017825b707aba3017c1a1ea858da5b6def. 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/QZES81914485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099fac4957643ad94b825e929686f3f15bd7b14216386d7aed8fe6ced3361ba8. 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/QZES71906927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc1f96c2cda73721c7388a8235bce97d68e69a3935041c57f9072f90e675e85. 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/QZHN31948786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222c3233c7deed269aea4dde1336b707f50a659a9ad36c0f4031a89612591ca4. 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/QZDA61963098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b81182cd79947b245d17db2df9e6288dfd562b9ecdaa6baccde698e1975d19. 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/QZDA61963699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385488ea05ac93ead0c379eeb9e8ae54a5bbeb4b409010f0d93b5bb2e9e85fc1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75697806a1743adba23147eb50569f677aa9b1c90171d15df8acdd4388fb0e25. 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/USDXS2009610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f79ff6776dd0b1984f10761c63481a78c4dbd9cb11976477f90290c3dbc725. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6365ad571faebe227008212e50cdad42cd71bb52494cbcf1f2859563fbd9eb16. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cbbf11c3dbb305c4467a69157bad3d35f1cdab7a7f15f4147716ab9370e6ea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ac5901257e7a6179aa92e6c382005e14c47244a279223a575edd6893fdf6b5. 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/USDXS2009614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931ffdc3cb7e3a53ea51b85e1953fbedaf3597361b0ac4099c1fa1c87fd39032. 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/USDXS2009615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56f2a7f5ac4e2526f4368c7f68a4c74513a5c452f594be44501d821b89305f1. 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/USDXS2009616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17999e89c08a70f5693f229958350874471429558d1b6ca0fd305ca0fa094bce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDXS2009617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760452773e868c66ca8229f01b1444a0df1e1f432b87c0091380b8d17123af4b. 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/USDXS2009618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a4679c0b86d51de005de89efa39ea7824b300eab99136c84485d64915a27cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f501443ad6bd48ea24078082da1f8b675df7aa5b26c9e78c488e17bca63211. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3174788c79381f618f25e8260c6c74d67b2b8cd9ffdf66a4ac3bade50a24bec5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3800126f42ea3f8b6be87ca417a771963544635c4a5a455a9577bd185d09e44. 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/USDXS2009622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3309117380d31aecec615c607191e7820fd719819990a985e911d5157c363006. 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/USDXS2009623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b1cf36c849d17c7ade82098e53a5e84848797ad74d76d93986feabc0afcc3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6505b96f0d89d0c3e00b028f0a57d17f18d0ff171e12032419940d7717cca1. 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/USDXS2009625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f81650dae4added08b01bf8c4c313be643c18dd09a82413abe273c1bdb05bc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98b41c1e46be27b780e2e7e158f2552b556ae5501344460a0ee838a452c2e28. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USDXS2009627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe617307492b9baf5bc6b25cc6b5472cb973d0a3b6870afb11a7bf6d635543853. 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/QZDQH2441952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7435c992190502d122f151bc3597f069244ac937666ff5aee655212c9fa898d4. 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/QZHNA2382159.