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 0x98431f263175c212b1f26c03ff7737c874bb14b65a67eb56fdf99d9b7ccd2ebf. 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/02e66181-a23c-409d-a535-f21aa5f4db88.json and https://artists.proofprofile.net/proofs/artist/02e66181-a23c-409d-a535-f21aa5f4db88.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 0x5c678261524b8b27acd8ed68d65bc3209d7e6f997fd9d742d1af09f8181c1eea. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/UK4U61300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee3a0b1535388841ae38d79a0fdcbba4174f76142191d544c1cc6ce5d4f823a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UK4U61300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c07a31819710d924122ec7c4f10364301fc99d9b1cb498e56e25eb64ead821e. 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/UK4U61300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cf48210c36ab5a970b4f9d94d016ce542651697337d159f10a7af38d02228f. 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/GBTBS1200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f94d44dfa353937f40399d5ff4f50974e98c2e3e15914003f03d8d130da0d41. 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/UK4U61300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b3a6a72c227c35d53062c779d9b678f27f88992c4f5b3239f8611163724210. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:21:59Z), 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/UK4U61300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5096d863d9272db053e7361b698391d447afdfd32aadde3e7408394641e4021b. 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/UK4U61300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2902436d59d3ffcc68701521b9571e8e4dc3dc84839552a7d700795acd9b10ff. 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/UK4U61400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ccee465047d7af0dfa2d4b13c5a637e824ffc8273c82f7571ca502186a3eb2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/AUI441500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69e0f8e0044400d8190e2ef33b45468d6acb5b17662464b4d908decc994fd32. 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/AUI441500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbc7f3f4078692a993aa57ce95d2fde0dff4eeeb000f81082513cda6be79c15. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:27Z), 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/AUI441500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c574f125f63ad362c4f96d3bfdc574a96f32b4c0e29194507d0cfeb2734d43. 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/AUI441500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cabd62cd6e0c18a2fdcf2ea76fc8098c8db925ef9813e3959ae961569f594e9. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:39Z), 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/AUI441500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacb2451e0282100ed7ee5f305451a30c7ae2bf9354e395aaf30ff5210d333f5. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/AUI441500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59550e482868501283ac2c60614124ad98e237d71710ab56776f2b41825385df. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/AUI441500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d2f90247e8052ee3b70fe34edb3c4f7b05b3c7dcfe0db3793b4334c4890f3b. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:15Z), 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/AUI441600328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773ace407f885b0847019662f432624ed7c3493c5f7bb9b527c1fc47397e1688. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/AUI441900168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c6cba17a3df78379cd33477f3bf4dabd46edb23b06f347fdbefde77569309. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUI442000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6da89eaab9ce204bcae77156a71976f87088cf0b4bdf7ea89fbc957c87d020. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUI442000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0e75c5bb28ebcb7d6492c14e3075b789c2c3cf22b1f669cd67f655e71957c2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUI442000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d1fa5994c9c35bfc65e946a2fc38674fff54c3c181711d7df3dd9cd27f8869. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AUI442000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a49cd223cab2727a52cd562fc71410ae8c5fddeb9c9559f20f6513679f6f405. 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/AUI442000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbead629c5156b4c9bb2dced89e802e65d6a6253c15e705a35dd2238448ab2e7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/AUI442000131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9720cc947343de6c50ddb2eeff6fed22c5636bf6408422ec1295fc72cde4f9. 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/AUI442000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b8a9d35e01328d6dbf607bc115747169d4793fe00383d3e2e57a919cd34cef. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:43:16Z), 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/AUI442000134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744497ec04c78ef77d5f04fa668386af816e7a5e0fd4d6f1a387e52fe056280c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6Q2483433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f02a9b3a3fe06751f1d59239b51a946973987a9a9aab00d2b716b8e21666e62. 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/QZK6J2456154.