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 0x7f27351742d2a4a1897c62f1dd487ef4e4f955434b612baa8bf6e4111deb3b53. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17cf8a83-2b52-49b2-a567-6bd7f9cf09e6.json and https://artists.proofprofile.net/proofs/artist/17cf8a83-2b52-49b2-a567-6bd7f9cf09e6.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 0x863816995b046b793ba4ed27a049085d181ca16bb55ee65c9c1d705e31de8c1a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA081801472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1cf9f8e8a1dd4f45676fcd6a73b44692b278e0e7a8397b82f9e3e8cab538b4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ESA081801473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c80dab03c365d5f01db1223e525c48159140dba10800434f6656aa4a094f2b. 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/ESA081801475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81207f98865de40131c7d5efedc97f3f60d4429e822a85f2c1387285db7f8005. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ESA081801481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372585978e8c6f41d2c9a45533cc8fd6dd53c6c57c3380d5f3bdfa31dfce655a. 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/ESA012178267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25436a81ab2d9491a7e4e0e2f03cffc7d753e78e2c892e3b1fb7e5e80149222d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:39Z), 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/QZDA42393410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd3d064f80ecc11cdbd21dfa873baade810696456dec4b92051525a771e3b43. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:59:14Z), 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/QZDA52338043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd621ce9dff5df36d4b74230f3403fd55798be23bc2005a67ac3f2d0859f7da9f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA52338048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d638f5e9d336f960daf483c5ce6f7d9f73c3aa175904da6103670df231da253. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZDA52338045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63806c15900895d2fe00ecd638667ec34feff6ad3e4545038c7588873deb2fe5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA52338047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67abfca8b02190d7cdbd12d74267ba3fde29bf5cdafcf1b1fd32af9bfbd893d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:50Z), 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/QZDA52305606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba38df45c8c2e8c4c240990e5f6f68c7a8eb2c033f257df4af0f6f2eb800be48. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA52339982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61df0d0e7a83fa4873ea1743fcb39d068d383a5335b61ad02a7221bd2157100. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA52368758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7f3af3615414d606f27a857025f8ef0bd868eb029ad0b6f322ded34fbe648e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA72387716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f3880776022f0298969a302c01aa2f425bf6fb2ca927351ac8b065da610ba. 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/QZES52307181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c1d1fbb58d28969a0338a34b5e8f7598ee18e0a3cd34de3ac7ecbce053071. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/QZNWS2310076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc1e25062153ed182238e88d36949e6a6b82008668511bb1933aa1fe87012fb. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTB22304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01688a303f73ee3491b0b313780e8c8326360a679087423055de56836806e7c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:20:16Z), 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/QZTBB2360713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b9aacd32bd5ea3fa76339e3fb335fedac59391f7c423d2259a8cc9789549cc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFK2313793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8919514fa47302c271347d975527763a2dadad4e84269ca03dc9356217c5b7. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZWFK2313765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd0feff9094184721af0f9f4e002fcb55ead72491488382c141bfc15c3934c5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN62435062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e29ef0326940e04b8e99808077bb047e716443211566442e5878561b5504f6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6G2454561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554ef26e58e3151d0a88fbccfd706fc353c3e26965f0483d4a2fd3eca5cecc7d. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZNWU2445754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c176157efab156daa958864e2671decd18d16d3c612ed85d4a593af3037ac79. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:10:36Z), 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/QZTB82429495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe772900712b694bb730406005d42f4b5fc74c62dde2fc0e107179148a3fe29e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFW2416652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7171a6b78c8e93774abdd0c40969d96496c380fa09202fe3683de2d4a9ede5c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:02:50Z), 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/QZZ7Q2441918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8654674f10b199bf20abe5156ff02b415b9870990c22b0a32363e9bc7fc0d4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:20:01Z), 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/QZZ7T2498841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40e9f1f1137a0e7bd6d567214495debde339244a95e712448cc680f658a5d41. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ42500136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8a62a1654519316daf0c7fbe4de9fb0bf07a2883d78ffae7a2ccb2aa79bdbf. 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/QZDA52584732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc956f9800103dca831e2e66a2f131b4048e11ac28da62d2fc60004627bf4ca06. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN72583685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d44821270b2aebaebb86f99d03377c5e86caec1a9e638e858accdb7b3486aa. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:39:00Z), 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/QZMEQ2508157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd931176baf6a92fdee126fa2468deaab0fa2ddf8bb4d931b555e0faf4cc02bda. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:25Z), 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/QZWFN2517548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6805bbf50601f7303c25c5c791cbf97a7a82219713c4c6a5532a88db67f96cde. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7Q2538721.