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 0x4853f265c830ff535bf589587316183fcf47e9aa98967a3186668c3d5a335a0d. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79077916-51ac-4f73-b055-6fafd6fac4a7.json and https://artists.proofprofile.net/proofs/artist/79077916-51ac-4f73-b055-6fafd6fac4a7.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 0x78d5f77b97c2176d04af5190892dbdd5a9e3db53455123a0268531d7693e8b80. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZES52421366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138db5f2bcef491298e250e898f8539f5ebdb44e42bbc0e4ee30c04296518d21. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGH1936511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6b75ca20dca55703c7f51e7500026be2d3303778e2ef0d0e738cae8ef92f21. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH1936512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0a193a2a9c5c49e7daad52bd09592f27d0afa077d17761b6b8715055fac1fd. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USCGH1936513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efcdf04cf5eea9d59a588516ff721eb276c3b8a251a4d7f33357b15259d0001. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH1936514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770860d3463216a035dd281b5c09f716e559f4fc0c55eb8d666c539b4b117c41. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USCGH1936515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143248827721791535a84239c88d3d87f31611aac9b60be92c98f5995b5014f6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USCGH1936516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aabe23a435e88df0e78e20f282e4179609309a38a5f882e47eafa7c833640e. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BEHC62000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73074142202887fbcb133bb34281f186a0666ba1fa0a9d309aae1fb63782734. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEHC62000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c8252f4ac2019f9238d213131d01d80b221be467eaa4ee1ad4da2c4481a105. 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/USHM81926127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089d224072b9717cd2fc06db24917c0bb9bdb832d666b90b502a210f9b093527. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM81926128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4f04642f9882a3f71ee78cf63138f502de5b95716b345268f9c3402ddba767. 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/USHM81926129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfc7f35c7488a23378738535b7ef3c1e2cd050968e5934e3d76d7d375e399a1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USHM81926130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e12cfdfe64c4970175cfce3c9d4611042b750a7b71c1e1f806092de8eb304b. 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/USHM81926131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b695b90694c29dc46562524ca60834ab7cc7ac668d98adec0a1e29473c2fb9. 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/USHM81926132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa21bddaa1082b2e63d5df525d3c78cf66757878de47256acbf2070c3836fc8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81926133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a8936fdfaea0eb4beb425750ed20b5c4d1378170132db40d151c5b01240d77. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USHM81926134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5aecb3ce8e99a07494709e22332405765fb68bcc1cc90617dce42f6e7e4a98. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USHM81926135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0e8a1c0622afd5abcd4448aaf861f360975591dba602798419a7f84368e7ce. 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/USHM81926136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e3a4a6b655febe20bcf7c3916e671eb24636a1ecbd3397c6a0eae0f3f9370d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USHM81926137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0260ab2004cca37e3bfd7c0883bc1402bc67536cef652c781a6d20517b1b15de. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM81926138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954670f81b7643093039cb06ea2cc4911d031403b1e60cbeb204abc459d3bd03. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM81926139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f48b9ed29e8334620c1b993275a3a18dc82e10d57caf9ce7a416d4412a74fd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM81926140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d700fdaf25982954cee301942f9f8be0e6340b4346402ed49728b1e2bc6ccb2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US4360900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9003ee9d3c94d5707037736cc5ab6adcd17f896aa99c8535b4ff4710dce908a4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US4360900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0bef422f66a19ca9a647e04dcad7c1a72edc990589412b9d35c449e1d1cdda. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US4360900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d42d4a4edd304094dea00afdddfc55b71c59f4e03e383786c9dc9cb31ed7b2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US4360900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891f8b466884ad46b82c0b05137b8024998c0597efa342936512eb5abd5b3375. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US4360900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c046a573562a062848743d438d65b97f5174724f109de4cf2b903a25c8331c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/US4360900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e31af647f724be26363b33a16a5dfa702cd46f33e2f8b499d19c685f0a2a20. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US4360900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd721ae375619ee3cda55826faa63e61cdbe2520242d6a790482646972f81de83. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US4360900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb814525aa3d302e01f396cfb34da75dd4558fa1a9a95871f9e9f95c7d753039. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US4360900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ea8ac9b2b6a42dcedaf487e68f0807de640ebef5c51d58dbaf10a309563ad8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US4360900066.