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 0xd773a62ccda6d86896617246e89dd674e79f0dacc9fa5b53a5d189508c973c45. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36514470-037f-4047-9644-719fbcce5e12.json and https://artists.proofprofile.net/proofs/artist/36514470-037f-4047-9644-719fbcce5e12.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 0x41f21fab2d043fa2c786ef4f84c94298853087971b152aa7e2eff7e570b12248. 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/KRF502303035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cceb28f2ee64bf585ba993a7af24adaf4b27a2beea5cf733d353234c4224d8. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/KRF502303036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bd45cf6d95c15b37bf577a2f0d41252aaf9e890197dffde12041c4139d7b62. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/KRF502303037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea78152fbb15486a7c3ab2ee815126223b3bf81b06408bbf6bd30074139544ff. 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/KRF502303038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46247bc2ee6e7687a2e28690b04a240c834ec32a0cada0126f77a55364f07aa3. 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/KRF502303039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dfc01a251876a381254cdb161c7a2d6f09699c51cda92868050a1cf863fa41. 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/KRF502303040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46ab13f96ef5ddd1572fbdb4e7c1e869613a3c6997f587d0b052f5d62c05e8c. 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/KRF502303041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cd07eb081f756f152857f8d7c62edc8164cbc2bfff2302b2e8235e900f6227. 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/KRF502303042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60b13aee56946c6a713e3d1a61f5132d62e51c6453cbaf51d3a7ee9a15b096d. 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/KRF502303043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7896b6b15d33d6cfa8543947c3a4f77728fd1c8a393102a3c6de0c65d4d17d60. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/KRF502303044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53aac9bcda7a14c60d5634202086f850106c3ee63757eaa683a80a9c0e6bbf6. 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/KRF502303045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684fdc06e776aaa5ec66fa42e1f96b3c28106a42f79de85d046e623d91a20839. 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/KRF502300378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c64f54688d65b75c3b30867af6db17a640a56baf9affa540f0f90e3e4f6fe9. 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/KRF502300379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259e0ab509d63c1be2611070bd394bdab1b3dc836fa406968dc70a336915e6d. 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/KRF502300380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103a55958451682ecbe283d3d2b1008c91c48b6487ad8f4de0abeb9ef9cc9a8c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/KRF502300381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a2c353cb44b40c6bc1d7bae5c34858d5c81fbd6fefd8d2bb4d4acc3ca3c0ff. 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/KRF502300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28254f62649996654ebc683f3833d94b41f8d9144f202921c54cc1e46dbc063e. 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/KRF502300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066eb221a3a2a0f49f7547c40c37ca8a04b9c6a5317b115c3f69689d15aaba6c. 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/KRF502300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c8740f7756f86ea6dd70ed5ecea74038f80f500cf4ae9acc0856b8689bc45d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/KRF502300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9f530b8d9eab44cdbeb747d2766d36d4da4e22205cf92661ef6203f3d32617. 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/KRF502300386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9300f5af0a7f340eb0e6085f17d1492ef94cb8f55743d282f7fba0d15ac2693. 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/KRF502300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae2cac6c46346d3167385c72db0ed5cbd1dfc0663037e57e7678b9fc1605268. 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/KRF502300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0da1a6385f95927f0df8bad6770e9dae6d39ccd5f296d5dfaffe6d8512a6927. 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/KRC092300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7207ff37f3a4d56f72b3f9ca2a9610f3c447285d561b7c1cfe13fd10d6b1ee6. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/KRMIM2178223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fa7d2fc62a01c4d944b189c5f755f04afab79327e21bfca03148f30aea4dff. 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/KRMIM2178224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54b98d873eb67f66917bb1878a34b8dabdfe49d884d8ac80942a56fb5409f86. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/KRMIM2178225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2c32742cee8eb1d60bbd0bd8a8f7f1e19daaf22c00a486e5262645602ae9f0. 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/KRMIM2178226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30305181285694dda5c0e73c921ab8d66450e4b44a5aa483795a5aea2b149802. 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/KRMIM2178227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d59656bfce89891b481aaac0c40632e09f1daf3660ba115bcc00f58a03e817a. 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/KRMIM2178228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65feec9f698dfe2218aa6ad0d818a24101b2063908718304f1a413b344582751. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/KRMIM2178229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdccd8b9675fa9805a4efe0b6098323beea79b3ad2d6e81dd93a3ef301c78323. 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/KRMIM2178230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06f1a5a1260909457f52a846e9887821c3223f2de81224113109d84f83d4134. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/KRMIM2178231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ab5a98bafc725e2ab67094615bb57f06bbf449ffcba35238c7d9e96add61ee. 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/KRMIM2178233.