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 0xe941f37ef4cc8d2045d2d985fc618cb14a586e59648322bc9e453f8ea0531b72. 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/4912c2c7-2535-4b5a-848f-52ee2820453d.json and https://artists.proofprofile.net/proofs/artist/4912c2c7-2535-4b5a-848f-52ee2820453d.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 0xbe9f34be1a8e2559a0b21fce82fe84474966642373f3d3d710ebe982bfd447e6. 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/QZN882130660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6db350e0094cc513e948b3fb31cd54ed660c57c6e32cf64c9f715c70698ffb. 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/ESA011739606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6db350e0094cc513e948b3fb31cd54ed660c57c6e32cf64c9f715c70698ffb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ESA011739606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8092980b899d3b1e3825025588a80970abfbc490ed63e105dd9e09003962b5e8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ESA011741309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7aa17450ab8d8e50552c4cab0cccf373824fbac8fe936a6f9e7bded71067c6. 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/ESA011739817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe082ed3546565faca39098b19dab6b70efc816b9b28e7e8178969677745f4eaf. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/ESA011741311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7aa17450ab8d8e50552c4cab0cccf373824fbac8fe936a6f9e7bded71067c6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:48:02Z), 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/ESA011739817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0192701117d48420f747060d8e029283472b27f8bb2ac9f2b4ce1a9f9ae77647. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:37:32Z), 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/ESA011739818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb2fe0bc9686d337874ff97ac35b27ec71ce0818f60de13f1e623bc46e87a0e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ESA011741306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672b151edf56f4426eba53b164d60954890d6641137af4f807ed2dcf3ef373cc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ESA011781774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672b151edf56f4426eba53b164d60954890d6641137af4f807ed2dcf3ef373cc. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:47:17Z), 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/ESA011781774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d5d9856157da9091aac1c2bf1a1ecf4d0c2248cd05f84474fb32cf614be5d9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ESA012152526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a3b79a5b319169319308bef4dbd04004a4f5b07c90a67f8f1fda6708eea7bb. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/ESA012179433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48200568e949808501fe763eb1c2e198dc37309f76d5acbede7be0663490f08. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ESA012183784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48200568e949808501fe763eb1c2e198dc37309f76d5acbede7be0663490f08. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ESA012183784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87287b841c47a6ad51a7e16a787c9a3037974fa10447a94bb6d06d87a46181b7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARIXB2106704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c09ae15dfc54a5b872b14aced2b106fe2f4e0c5a8ec5e43f434b0a3508df858. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZN882215828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e81325f03b174e0d2b4394c9863844751c60d04da899a9f00ebcfd959f82805. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/ARIXB2204325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde77fbf629a902310ee9457b3c9f3a4cc8908a47f09e3f34c9fecdbbbb1d63e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ARIXB2205679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde77fbf629a902310ee9457b3c9f3a4cc8908a47f09e3f34c9fecdbbbb1d63e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARIXB2205679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69550a440b7f38ae0f2451435a3c3999b43c7b12fda50b91ce5d167001c7a570. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:01Z), 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/ARIXB2300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69550a440b7f38ae0f2451435a3c3999b43c7b12fda50b91ce5d167001c7a570. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:08:54Z), 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/ARIXB2300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389d8a2e6433e9aae22144c6df8ec2957a44c8b9e5c20a17ba96727620c4bc60. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL8RL2313357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49853c04cbb9746c8e0863ae49464c7c379e8e4d9e552a79e9cd24cd8e6f5dd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:39Z), 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/NL8RL2325145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a237f05a615fbd5e3b1fb0de9e5ac95d0027afa9d74f84b8b9c77627387a031. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARIXB2402150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c1096e4c0d55d56e5bbec8863d9fe68f616522da356e7e3e1cca6be4524a17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARIXB2500168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d5c345de5cba13b5077c8b32b90685701cf65c848e26dd1688864d0b7d05b9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ARIXB2501279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62418b938f3ae87e6a7ca4b6854a4a5b47f84ba9bfb13b2576c9ad0681d048c6. 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/ARIXB2501936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703351d95b8f606cb7ab3ebe5bed8239f2f7432cfcf72a67e0ebe1b89056d96b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ARIXB2502108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e18446a4fcd005691d60bc39b0a8d1e3b0c86929ca6e36e9f195ec11bbb1a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA082376064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bf58f25ecd8e4df9820759921342e1f8a59bca0c4f286c9c774d8a69224138. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/COAF42390407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf19b7e95fa22ee2cf3b1e57188eaa9a41e18a86f073a36fb14f4ca3e3a68dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDHM1719532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fffbed868c467c81a39b132a29a8c08a240c6f17aad5be14e680ec092f14460. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHZ62288186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c760ad9b6752634b9dd5eec0855987c29a890645861dac6bacb5fb0b00364aa. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZNJW2398773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b43337805132051657fb2fb400d6c9358a4385ea083022ea7d0492e748f80. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ42043233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c760ad9b6752634b9dd5eec0855987c29a890645861dac6bacb5fb0b00364aa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJW2398773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70f823be764fa0b58c9fb45194719cae0b47df74817b318a19618971340a05d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/COAF42290242.
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