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 0x9bdd48dbe293fc42b3b12c66e032a2412ec67e5168467eaca6a6d1536adc904c. 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/703246f9-4130-4c26-9db5-5c983024c0de.json and https://artists.proofprofile.net/proofs/artist/703246f9-4130-4c26-9db5-5c983024c0de.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 0x5fe410619dda0a92d642f046fe76eac695c1d3f9d68d8976dfed97065c49629b. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QM4TW2093136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194d08eda85b6b334e5809e5112bb25b3a8dd84c1ecfdfe080f9fc71b5eddccd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM4TW2093144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a210da2c8c727428f39662792c03491295e5366876636daeef4ac317c89f69f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM4TW2093153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48dd64db42701fa1f1cbdb32e47aac93184c676ba9c2c90a32c578352f569bc. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QM4TW2093164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc140f3e04cac240f60e0c655dbb20979ca183120857360eaba08aec6aaa1df. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/QM4TX2058641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa58b194dd5307e81cb958b4c2115aec76e42d3682815c96c40a40eb84a97407. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6N22087274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cfef7bc2d3472cb8e815aee081eae2c00fd887b125fb2640a06673deb15923. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QM7282021541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aef76c4ba212d3c3fbb25edb7c7d6f2a0241c98d3b8ee454338ad61c0f6705. 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/QMFME2006029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf38885f8a0732c5f8722b00e067bbdcd3750052417ef0589ca3333eeacb5710. 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/QMFME2078730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d3457c7e77cede79ccb9ac8a65985124eaa1dff5f938abd0a2920e4d8876a5. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QM6MZ2165219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48431eac2d30389113c44b59b06f5c4afbe6645d77b75ea53a75409f0fcc7ecf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QM6MZ2187637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce316a544a9d798d6bb32a498bd0e97d0dd8b8321780f762b2b074c2bae9e4d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMBZ92198334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff2eac5cd115bca1b39f394556d9a6ad565a386103973aee67f837d7ea19566. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QMDA62176901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f64d966400f546c040bbc111b1d5930108fd830024f87555b9ed326db64d6f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM4TW2240875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f51f86d6e57e38d79331db6c4c25afc7d3f52731003d4b5647833f838cb514c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QM6MZ2268649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c85a13d486f2acc512f4c49f0d0ac3a4220dcf78aa290129782f3aa13b730c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM6N22354130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4984a912ed5b3bd6fa5f7e905762b0cf09e6817bc4426104f2a9dd31ec3256. 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/QM4TW2407933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29c33af49ce19b6a7103b95ce1e7658cd297dfc9599901a975c9e6536e645de. 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/QMDA62450616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55083459b49a073ed2b86bfa867e519c1834d301dd757f3fe599ff199dee0a4d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMBZ92411542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c85a13d486f2acc512f4c49f0d0ac3a4220dcf78aa290129782f3aa13b730c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QM6N22354130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa58b194dd5307e81cb958b4c2115aec76e42d3682815c96c40a40eb84a97407. 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/QM6N22087274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e53d339e71ba34a72fd8231d14c41e9a104bab085d44c3bcb0aa58b853a2ddb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMFME2180142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf862d1f30a19059b7790e8403711eb5ecc4ba640aeafd13ab076a44c70839ff. 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/QM4TX2562139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3eaa5ec57aa68088883a26dbdd9a985779c011253ceffaf62684847afef1df. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QM6N22554375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8eeebc83a1e7ba6157b32ff9c4fc3a2ca7cc22c7651a9ea637b296b13c1786c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QMBZ92505024.