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 0x1a3e4a6992fdcbdab74bae99f11e427840dd79a9a2102dfdc53df0dc7ea224da. 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/993aa553-024e-4b26-9751-d46e84286af7.json and https://artists.proofprofile.net/proofs/artist/993aa553-024e-4b26-9751-d46e84286af7.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 0xeee9939b03b0a5e8af0804ebb7ebb789403ec166d83021bec626589de8db79c1. 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/RUA1H1769158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c17fc719dc471541c990abc98d8d534cf0a6df3fcf020b0f5f172b5f89c6da5. 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/RUA1H1769157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa912d1e9e6abf91a6dbe203e9562647f5bce8398123fe233ecadd0d7ab1ca935. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/RUA1H1769154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f15b80e353ed7e35ed2cf053d669563ad9a4b35386a3e3640da4e8b0bd8d2b. 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/RUA1H1769153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77931de4e8db1f4d669b8a0e572c5f33deee223107cdc3a40d32c43b9d0a170d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/RUA1H1769152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4bea65d1a328d62c430f87d305e0d02ffbbd7de94c436fbe27d27f4008732e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/RUA1H1769151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cc5def1c6991265e9e63ba122c00763b1511e1e79855de63eb8e14c9bb8102. 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/RUA1H1772457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af2ce94622818fb8d4ed9785b564bff0fa6cd892d2aaf02681e472228a8ce2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/RUA1H1768525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f4c4167917b6e6f3564e91a2d16aa15c66266a38eb392641de7d5762ab4b13. 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/RUA1H1768527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719eab1c0156cdf9b4fc4634c4033ba357a5c45d5efbfe145f9da12cfb87bfec. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/RUA1H1768524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9285914c9be3450e1dd26e9efc7922c6db718ae1af92f508360bd7ac7d5d65a. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/RUA1H1768523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600a455c46349cec8626cdf9dcdad1cfed7f8ca48daefe1164be29aa80670d53. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/RUA1H1768522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae7e2d57c5f4640a1690c7def6d2c333cae7cd60f2a7071f5eba6e3129e22e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/RUA1H1768517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b4b0db38415d5ac52ab63d9c8e0ce8ce10dade00c678674b22889cf2b3e76d. 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/RUA1H1768520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a68265ee2f9921dc981ea41ab3d35ad7d8daf98d954240ebe1336ceeaccf0b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AEA0Q2305441.
Cumbia y Ska Party: Mexico Libre, Tres Patines, Vatos Rudos, La Negra Caderona, Cumbia Sabrosa, Cumbia del Sol, La Cumbia Campanera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c65e17a33820390d1042666fea4ba869221270beaec2fcc854f8d8d884b08f. 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/QMFMF1399797.