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 0x789fb0ddf4a80aa42a0c5cf5d0554393684c57e6b41fd819c9774a7821a6c6cb. 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/123e41d2-4e97-4106-84e2-515372e1efb9.json and https://artists.proofprofile.net/proofs/artist/123e41d2-4e97-4106-84e2-515372e1efb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mura Masa & Charli XCX - 1 Night (Broken Lip Re-Work)
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 0x6c09bd821af5fbcf7639eba4771dac43292358b8fc6ac1db59a4277d146ee597. 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/QZ5FN2224479.
Maribou State - Wallflower (Broken Lip Re-Work)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdf06d5cbdbb47c1b4d5535ec7fb68098e96315f1fc9d7d67cbe52374e2462e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5FN2224482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8c1ddda87e24923b5c30e939d3af2b4b5e92a6dce9f2b19583dcc5dfb5a71. 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/GBRKQ2334281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5032fd3407e81532f0fffaa0da06160df67be0cee594707e840cbd8e7a24eb7. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBWUL2371120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a54f22d5735c07f5eba6da602e175aae6c730ca8da903f6d2142ca030c9df. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZ5FN2417374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe893e9980e15f73f4dfe8c48d33501bdef4d9563ba72e7964b3c7ea77f9a3b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZWV32417449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c863cd8cf4ea2431b951fd627dadafdc64910ced4f23fdab1c68248e4f43a61. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZZ8B2498256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e08cc15bc35b35f6eddc2edb5f105af92f0a4ab4c310cae75a78726754d56a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZEB2400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54586d8800d5d6d94109dd28ad1136ae863c66fd2853ea9134bdf065c0b33696. 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/QZZEB2400624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68221045247c7c16318962efcc6f8cfc640b19a39030c95b0aec9c9be87e6f49. 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/QZZEC2452737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb530787803af5abda7a08685561e99961cf2bf73a643355b1f8b933a242f4bd5. 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/QZZEC2452744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15074e53885081155c27db97b922afff680fd1b158bd512979a6bfb79f2f5a51. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/USLZJ2558934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e588137235162c6c58f7ec9f71a80d051fbf456ba207178408940b8d1d0fb3. 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/QZZEB2400625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579f41ecf3bbd0743334eb69427de63f6d5aedd95147aed8559617278f1aa3c7. 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/QZWDE2427337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfb651ee7bbfcb09c7df5848a67eba501c59ccd0c1ec5f26281e54c9c7f5e8f. 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/QZZEB2479376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c863cd8cf4ea2431b951fd627dadafdc64910ced4f23fdab1c68248e4f43a61. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZZ8B2498256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21ab38b8fae405efb21a6a104e878b0bb4c4afb218bf87ac454e372ea3fddf0. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZWDE2427334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe074c93dc35d29953e1ab9313f08a162f6248911b80f74d92ac3081d911e3846. 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/GBRKQ2535808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184e4cfcca74ce0164e75cfc003dba24acbb6e9c770c3e92b493209ea1915d34. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBRKQ2535834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68221045247c7c16318962efcc6f8cfc640b19a39030c95b0aec9c9be87e6f49. 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/QZZEC2452737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e08cc15bc35b35f6eddc2edb5f105af92f0a4ab4c310cae75a78726754d56a. 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/QZZEB2400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e9fbfbee123c8d31a450130541f61765121b99b4bd65627da6b5fec943d422. 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/GBRKQ2535979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15074e53885081155c27db97b922afff680fd1b158bd512979a6bfb79f2f5a51. 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/USLZJ2558934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e35fc1711fe05ee62a8de834eb0b96c56951f833dd0bfaf6ec54060430ba8. 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/QZWDW2582517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9d3016ae252869c84035430224fe1369152721316e041496dfaf85abc30feb. 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/QZWDW2583434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1606318cca0fe1b3e82e210181f141e6874aba943f0f6c8a3611943e4f9f6c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWDW2583437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96177dd6f9b43e4c20cda9c1ac4f9003044e46d986dabbedd711e94cb4a831b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ8A2538263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d2bc205b3fda6c39cd10e4feba779c933bf1271d38ac8805e516ec60c0523f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ8A2569790.