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 0x8f6c46556109d2f7c77fd5226e1f1e0419a16744af2780f01ee87ea2f4e1a200. 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/4f1caa6f-00db-493d-91bc-f000655e0832.json and https://artists.proofprofile.net/proofs/artist/4f1caa6f-00db-493d-91bc-f000655e0832.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 0x1a3b3685fc09adb7074f0ae9f3956ddddca800dff15437d08857e3bfe122d4ca. 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/PLUM71900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b649edffdfc13705e62afebdf89f31d7f58f99507cfb0abb479f093669050e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLUM71900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618741a50bee5b949d3a6aad66fc0d7347ac66b5bdafc0066562be05d6386ce. 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/PLUM71900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bc5a5fe4ee516e1887fa3c06fa3e18dd52df1eaedea67a4e5af29e753c2d45. 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/PLUM71900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bd9586a7a287973cad4180caa901124584c4e29895ed68027283b383bc5f81. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/PLUM71900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c985cc043ded27c8131215df45a491c57d4f08ad7072576186c81f7b75c0ee. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/PLUM71900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77705b36d2613daa90238ffc23fa5eaa28a26aed41e2ec9dd47e726df22297da. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PLUM71900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0955a1fa4487c64e6fafa776a0c750f15e977035111c8cac38ccfaf5755c5df5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLUM71900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bce56703598a94f5abf64934ae9deee27a774fe569441dbb3832df564639756. 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/PLUM71900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa460f39da079a21d0936c389548a2e935f3e0b73be817832ea2f24069027e9d6. 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/PLUM71900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9624c444c06866f3ec01ddf1ee2f0ab29d03784f35004ac8e682ff2dc73fe9ed. 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/PLUM71900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7757627f31444ba64ba65b28159c9cbc8e11fe881c1fbc4bea93e6e80d3b5a6. 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/PLUM71900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e20c1a271fc79ac143b35b33ba0440b55aa85b5387ccfd516d5742122d6f6e. 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/PLUM71900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b4a49f4383d644b606ae0c4f5e979ff424ce97d000214afc63d485d60ed7b3. 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/PLUM71900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4419641dc3c2ae8ab06d5f61f7f02ae6e3b51be98e3f700c8ee5fc2f749a18ed. 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/PLUM71900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c171239019285957f95d083cd2371fc8bc978ca2b525394206f0d02ecefbfc. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/PLUM71900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe778aab0996e040d43e6f38fca585af017a898aa2a947b38c9f4296ebe5d9395. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLUM71900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7b987777ecc0aab8cc11c490dce7e8158dc4d59f9afa102ef84f1fbe475b58. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/PLUM71900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7896fd8c2ca1f96c39f4fa6dedcf99a910f2ff99303e7ab53e83eb21a4e9ff6e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PLUM71900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3016807dd8cd042685737a7f9dcd9c278b825689b085cbeac4876f1ed632c147. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/PLUM71900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8239658a45a287fc40e704fa9cd658fd8e9b5bb068da4ca7296c7e23130e0e60. 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/PLUM71900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bf118a3fb278f6dfe84715617b3848b72a20d9593a6828dc90b33321528b39. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/PLUM71900038.
preNatalka - Dla Maluszków Także w Brzuszku
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62315665f0197541a2ba95dce26e7627e3a3b084f3911dba116580917985589. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PLUM71900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6449130d3a3b299efc89b1fc4c639d5ea9750dd14c72bc22fab87e29a509ed22. 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/PLUM71900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc327ac865ecc393e7b8de24b7fd9e2f336e17caf2d04a57b50bfcf0854b3e7d6. 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/PLUM71900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe592c6f9c327d4a0d916d0ad176a6d35d1f5502e2121af9f6b989ff5ad9cca3. 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/PLUM71900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183ce4f05771864fc51d29dd2cd45b4f1c9cb2772dcd970d90678f91d2627a8c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLUM71900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37100f4f9eb787fb0d02fe7cab4384b12f5f59d39e5f295e4d1379e0f0fbbd91. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/PLUM71900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174d83cfa586e3c156e5d21617b608d87aaba3c9976f6f60827639afe6a56eb8. 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/PLUM71900075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfdbc6b0e122c9d1480fe7888a15ed3028597442c16704a8b3f445d48138cbb. 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/PLUM71900081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d3723091ef75525956d846952a0efdad25416d752e5f1d4d5aef305b2813d7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/PLUM71900083.