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 0xf102914f03c5b45473db51c03fea942145776ec3c90fa47cbfcb3022703bedbd. 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/dc64ed6b-d8ad-4d6e-b964-96f4b5a0738b.json and https://artists.proofprofile.net/proofs/artist/dc64ed6b-d8ad-4d6e-b964-96f4b5a0738b.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 0x22f14b00ecc2ed7c8ae2a0a6ee349d719ba88e65e322466be2161c6628030414. 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/QM42K1797639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3399d15a8eedca3eb4f5b54c4302ec033dc4fca81cfb1a8b012dffcf1dc6c9d7. 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/QM42K1758820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a4d950c56bf181687d9e30e15e8307a739d9047ec48037a762a6c92a50c53c. 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/QM42K1774215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f80b8c8403b626d6b960bac214043f8d41aa27bb78e969799a5c9b9d5023dd. 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/QM42K1742256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a4d950c56bf181687d9e30e15e8307a739d9047ec48037a762a6c92a50c53c. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QM42K1774215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d296054dd58c5501c5884c3bf08db5c7d037309f419756800c3470272f4edcd. 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/QM42K1781325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a04305a277b2eb9b31f77acf39a68af62b99ee4445ec88cd94dca3c5d54245f. 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/QM42K1753940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abf5a1a1e52cf3efcec43fc23cb1f8c98323e88175ce6a5dfe6b354c11dc6c1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM42K1782822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6142270dbd739e592ce99062252714e8c4f4ff2b792e98c9b84ffc62ada309. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM42K1772453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd58036f591b8a438421ed30ce94199e14c73395cf50df82cfa6a7d838621eb. 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/QM42K1745940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3ea27dc6239d9b1163e780c288dede3c41ab6065f2123e1ff0e1a4b16e6229. 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/QM42K1820881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e729c72cb1270a5f34106dd7ea6ec9bd63a81ef2fdabf3c96b2caa8c5cea02. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM42K1853783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd04d57c2b6aa3b4ead09148ea2a6b45fb29f7a1c45afa7c5e4dd3ce124a9da. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM42K1842391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0305902674e3a409ffe1622647fdeb6783dbac824ae53ed24871d2776dc78409. 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/QM42K1928484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189beac978bc1a930b5a95b052f5d975735195bd09ae01562ee1e8c86e55be96. 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/QM42K1900656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f48d5373ea1e6dc169b21159acd6dfae9e81b87a94bc419b056f67f8103d96d. 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/QM42K2091550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b13f40688f601dd6b204a0e478bff3107fcbd41b7c6306d8e42618a0b5d86. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QM42K2048924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba31128e33248d366c994571124376230d1f3e9dc562ab548f213b1eef6bb24. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QM42K2040923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175f8178f802f242f7c915a04461f9c862e88af7694c95c89d4c82f6dab854e8. 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/QM42K1801171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e108155cbf791f84c6639a0214e50a3a30b76cbcb48cd0c0c595f37bea2e513. 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/QM42K1863809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00185bc8288081a0357137873fdb0567a599de4a6021f026575766ab81e959a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZK6Q2199505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaed902b44079fddf7b61f06ea42534c30afcf2241fe074e501de20180ea107b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZK6Q2199507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87342ac6246899d70cefdabd194241ea4ae2cb1dd643f99bf13214ebc3d70163. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6Q2199508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa40c8b745f2a9c2da0078329f8e346bdaadfc13be6efe0b6b86af4908349206. 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/QZK6Q2199512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7f24d5ae737b7addc0ecf88abdc0788bf75b7b708b556077869444c3a8ecf4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6Q2199518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdb87e15ec2ef331ed2fb2ec7eb2596926c718dbf2d1731829cd74fb9107b47. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZDA72251461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e860259c6b6a1522bc70d866a92d18f7270f1888e44d8322dcb648ca494e46. 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/QZNWU2353225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec947f61636f0ce7d246707e1d71e8cef18cf4034a246325c8ed3033b436181. 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/QZNWU2353229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20e5a4210cd179946212286ae36c6dc293c7f357621a3e8ec6aab695a55dd4e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZNWU2353233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4defe944004ad8dd75bdb68ad74252e239d56c5f81d5d342428abe2a042a4880. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZNWU2353235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddf51afb76215c7df2b0fc290c3bc5ebd17e775534f57fe3bbba911e6be3507. 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/QZNWU2353238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e0d4795ad136d847700c37709bafb3322a15f988bc30ec74a404095c195f5. 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/US3DF2488837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b756e606633c961894dd164e485c51abe7c4f83be98c2209ad0772bb2e1bfc5. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/US3DF2515318.