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 0x4839899842df67eecd541e5abca7d79180a4e27981d21bcb82bab2632994d893. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/521c00ef-876c-4e9d-8d7a-1d8109694fca.json and https://artists.proofprofile.net/proofs/artist/521c00ef-876c-4e9d-8d7a-1d8109694fca.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 0xc96a32617837065551affc1458a442cd72a6ee38c1a67e322a10ab217dfbd64d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBKQU1237004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8952dff004d86fa2ec0e1297edb87ca5c27a490d809162d64a35fcde0b3195d5. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/GBKQU1342416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85d02ded23df7d5644ea5f5c66e78ac3826fd69805300c10895abad7b984aa1. 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/GBKQU1342401.
Lift The Heaviest Weights - Original Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaa8782b0bc15c4f5a88e316e91df4695790da95140dcc3f0bfbb35d935f84c. 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/GBKQU1340708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e9f0e477bbcb07a4f577c7172e9d81ed3e01d9bc352e9176932b4a9aae94de. 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/GBKQU1360043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79690de82bdcb70a639626b30c1d9ff89c049e8fe43df2bd1e30cebdd9c6cb8. 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/GBKQU1358772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1428634fb69094eddf8166b967df1fc7a0e1ddf2cba72e61f5b80f97ec9744aa. 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/GBKQU1359023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede096d9a80b3f325c2257d90ccc29a6697d3c6183ca0a92422399aaaaa25605. 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/GBKQU1354103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74354aaeb2db140b3839e279447a9d59067f6c8e2ff0c401ff07d94b40435b1a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/GBKQU1354106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5caf6ef319f3a050b719e241598431c35d1431f6a3392f37fabddf6415af5a. 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/GBKQU1383002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc60307b4fa39af564f0964605831df35d18230421b60cc1e908000b3b786b0. 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/GBKQU1383003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a899b8f0c0f4d0b77f3b4cd7a0f9cdc515b6f82a69582e88526bc28956e2b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GBKQU1393789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bceb8b3527cc005858547b7248381b6b853e543df450bb466a5b3d30c63fcd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBKQU1393790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9482aba30ed8e8541adf5fc8054308fe857d5d9ef63dd22b8dd0d67d811f78. 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/GBKQU1311722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aab8be336c7a4da59c890324f4b4ee8e76366a8ccf83c23f19a55ce19a44f9. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/GBKQU1315977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb411e529d2e5f47a83c66a0691aa8d979e6060fe220ac228cdd19f6ddad30a7b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/GBKQU1467573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3267fa6c08dbd37955876f1c9d4adcee7535e551a0ebaac75ab7657ea5e883. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GBKQU1492774.