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 0xce988e75e58ad6af226b831d532acb053d7fff13980fa2a58f5bc15fb0b2149a. 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/6428a750-931d-4042-b4f7-824b0c021341.json and https://artists.proofprofile.net/proofs/artist/6428a750-931d-4042-b4f7-824b0c021341.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 0x0963623f90955c06e2d979aeaa24919bbbe04333198e3d5a39c8a9929076bcdf. 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/NOKAR2202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae033140caa71ba5ad099466aa2607a43e1aec94fece1c04f2b84c09a96dd2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR2202020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb60b7ab375725c32eee5226f064a058098f64240c15c9df35d1f83c633694cf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR2202030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0598ed12b7494d4e100419cfbf84fcdc7dae5e2392341eaaad4e35d07ba95ab3. 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/NOKAR2202040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6ef1e546eb6569840b0c80ed4e79f5243c0899fd35ce0fb8a661eafaeb6a16. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR2202050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf465b389e38b4a6639a822319ee50d88f81a83ba8fc90676653ec0a6aef72c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR2202060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634878d5c1ed06125eb0fca66f5c3f3e2798b36fe09d89e609be6c0016d3c6fd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NOKAR1903010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf139b5976c6633666e152c4eba453b51c0475eabf797c426f4e54aebb03ef91a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR1903020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abb4bdde9ef916843e2d2e1bfeb05c43a02f7dd49edd03566608f796bba6038. 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/NOKAR1903040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c94dba9ec2dbe6d43cdeef9c4cb277e5337dc4b8171c28d9752a0f8fb4a4f9e. 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/NOKAR1903050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13ef5520588e5b00554bb3c18d0c9513c6eda096da158101c01d16a250eb5c7. 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/NOKAR1705010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1db493f547f133644efa112b35af08249f53e3d9127171f711e620cb347562. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR1705020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32f5ff9e66c5b0f0b2294e2df0ddfa744bafd6d87edd3b8966b0aa3927b2e04. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOKAR1705030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053ec742fc32b7606917600d68e93f0bca2c5fd54cf77ee5dd26d477cc69371a. 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/NOKAR1705040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee91c1d0f1fd90eafaf4bcffd9729d8656e73ce8c71bd183972a9ea75c1f64. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR1705050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6233b9e1c50548c7a09c89835d658fd6531cbdaa79bf9adf5a99f5d8ff34f9f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR1705060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf130e25eba5ee2ad57fed3f439bb29487b8a45d4d2931d7322a49a9e61b85bbe. 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/NOKAR1705070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c58eece01ee0ae9791fce6920ba82d76ee426c263682777045b0c4011eae9f4. 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/NOKAR1403010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d2fa03b1225c9fc4d0df32ba8f43810d47ac162e8de9ca50804694c22196e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR1403020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa766f221a7bc0b72671230e5a79296309eaa697ef18628dae28fa322cc474007. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR1403030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345bf2515d9d08c184e9277868ee2eed2bbbc122b56df4cc3c368999316087d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR1403040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b99f6a2b578d0b91b4e2734a3df7335f0b56c2f0d0a4b675a5a0f9f8c7d964. 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/NOKAR1403050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8945c57bbbb26db87674362cb2b4200daca5a45a44ca3829a9610fd1f130b5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR1403060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f358f6add5d96d8726b5fc34cf5075b05f277756ee43a2220cfedb5375c652. 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/NOKAR2212010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abb5d9fd615f62e709828ba4d30ebfff99bced1c2c70aafbfaed234ad7a5b54. 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/NOKAR2212020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0bc45350e9ae054ecd5502daa72de55eaf9783516f6a8c17b50a2c5ed011ec. 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/NOKAR2212030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73278c2b71dbcfec864fc67fb1b60f68746746cfca5d912aa3c9c3a636eed4fc. 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/NOKAR2212040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f358f6add5d96d8726b5fc34cf5075b05f277756ee43a2220cfedb5375c652. 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/NOKAR2212010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd1e032774140d1ac595847fd0c6b2cc7a4a3092036442750fae247a39c3935. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOKAR2009010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0950024047df6e105ab2608ee66ba4b9ba03e9001f2d6db82cfa098a16990d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NOKAR1802010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961b6c0f127090fa352d88b651ab501acae14efbb03a2a024350adaf3e491bb0. 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/NOKAR1802020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780ffb3d588bc27769a6187162af056630596d2f9b26946fe2071cf6dbb8760f. 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/NOKAR1802030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc931b6d0e0ccba737125650f161b14469f7299729ba06fec182b8b8aa1c2b446. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/NOKAR1802040.
Lullabies in a Car Crash - Alternate Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeb40efd283dea12d1edf091d7a5b32f57ffb32d4b2ea06eb383e5ae995aa7f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NOKAR1802050.