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 0xe9ce0bd5b3740256e8c2a660c1aa9b8f6347d7a378e3066b709ee2aca31ae143. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea3889a5-a8ed-4687-9191-945a875e0194.json and https://artists.proofprofile.net/proofs/artist/ea3889a5-a8ed-4687-9191-945a875e0194.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 0xde4ef67180694e6faea0a755c531f3bec03e57a41b8a8bd9ace7fcef6667751e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBRKQ2416110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ebc9f2bff4fe1f53792cbb903530cbc336e676414bed5276bf235dabb3b1c1. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBWUL2422551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119341109cef027eef4867ba9f1b4fd80af7558970cc99852a586d305d80ccde. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GBWUL2486978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9b49f72698f0390c67c35add2c64f383c7b5f2b627abbc058b03d3d9851cb6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWDD2456785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1923608ac7a3915b0de6617e0cfc33e0a47a6beba5c6cf2d7bd60dc080fbcd. 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/QZWDD2456786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59aacf2df65dc9343938aa95bac311862e624f6834ea1f59a8066132b755c58. 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/QZWDD2456788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb34f7c1791481ed58f0d8d8184af7f1fab282cdeac3cccec7c6c270b71e6ddd. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWDD2456790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc6ce2470d43f27112fed91a2cf97ed7a2b38b52e12a1b26f09eeba6b3583e0. 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/QZWDD2456791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1d65ca999b3929492d49d360fcf01f0c88e3fc61875556fa5a8c3d6d5923a. 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/QZWDD2456794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9104678a37b073c2cd57bffb6c7f374c6343b51aaef1b82b3007393fe12841. 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/QZWDD2456795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb208fc2d8e11180f1d7d7d5bae5e1238262013bf472abfa9ab4dd092c0ef735b. 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/QZWDE2456621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768e847e22ac8e41e70313f0e16a34c3ea66836f5b496bf14aceaa13022965f6. 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/QZWDE2456622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3ce378b94fd893d94a2c23e13764c81a85bfdf2a62a70486e6b22cdc3f2480. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZWDE2456624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0350a0c958ad7e67d1d2fa6913fbe9d976e11b9bbdeeb0ca7836299a7bd57e5b. 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/QZWDE2456625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f8170e27349be7520ff67b6ede604cea623f8a82489bc0dc3b92534d866ec. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWDE2456627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85ad83d0b583e000ecc17422eb09a8d7a82cc65f31129d5ef4346f1426b0057. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:28:35Z), 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/QZWDE2456628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925d44f543e23a7a81d25d7020a0be6bfb4405d5ba60616149796ffab3e30ee9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWDE2456631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a44a56c56dfd22098bfd679f25fab0e439f4da2664f79ab770acfd4d837681. 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/QZWDE2456632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fa50961cbcf6f94149d402511820e8395596a2dfb523d756089fcc3e928174. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWDE2456633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe158e8aa25bf8a932d51bf67fe32650cf5add6aa209696c3b9e7f620697a7f60. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:38:02Z), 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/QZWV32479001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906e78767954e24950a6f396ad6e351c35d1e8d576e479d18b551d47bb887fc5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWV32479009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e79728cb4c850abe636cc83956fe5cbaed3ce0770945ad228eb629a751ea371. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWV32479035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ce56f92317289fd11ef51c623dc0a8b08c4a903fdd26f501110aba40054e10. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:16:55Z), 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/QZWV32479059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d72d3ff56fbadf438f7ce83df14e805265160b5389a7cb47e51556a1dc25d8. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZWV32479080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b00b8e90da02db9fafdaa695779a45168cc1dcbec034e00c54998206b0aab3f. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZWV32479087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bb090af0f3b39532ccbb95499b87310df2f7a83946ab630dee05f29647b720. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWV32479102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8f113c48f93c11d7c10b8e3beec06c3d3d2f2c57785cce250be4b39595f897. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZWV32479128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681d04a2836541aa4bffe23a3b9cf6e689b1f93f3c60d56493591725b941bbb3. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:22:16Z), 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/QZWV32479174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666b1f6a4f4788fc1c6074ac595d5884124ca0179276c6bd31c89dc2d50a2626. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWV32479208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67ad0ec7608ed209df14380fb741e5e676c2441d3a3c266870303a2b994eb9e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:04Z), 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/QZWV32479240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb7b073073b70b222be1f039e38d0b2da0489f0259a615f053e21fceb268211. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZWV32479256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3ddb474b9e5ad4725ccf88b1240280dc48e81c674a3e004afcde8576c1c739. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:04:01Z), 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/QZWV32479257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485fa1598cb8d08d293970954459b7c27d8cfcdf681f4407d63b1fbe7f04aa4f. 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/QZWV32479282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390c2938fa3aff4c041a11393c5b08855c44d955e897843205c6640ba504cc18. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZWV32479307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17da5b2e5a80023b3389e8225efff79ea1f8f1ef8f61ff42a4d4e986a597393d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:11:48Z), 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/QZZ8A2430087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ede2f13b04ab2ab7b2d4b80543ceb72631f22a0c119e57775ff7349d1b5dea. 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/QZZ8A2430088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef6a0f20ea4338fb40bb4a9bca4f911c941fef61b56677b70d3409c66e1c746. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ8A2430089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fca3d728844d60ce19174e0a979a9873ff491de7d446fe8b641d6fb67a6973. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ8A2430091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc8868c016bd037a131f5d2975ef3db75fdc1d464cebba9c22d75e6fa9b0979. 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/QZZ8A2430093.