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 0x79c63f02e7e54cf15963c1e23d65f954c037fed186a122609bb41a5528430732. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/881cc170-95c6-49ca-ab59-3e9abe09517c.json and https://artists.proofprofile.net/proofs/artist/881cc170-95c6-49ca-ab59-3e9abe09517c.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 0x2660dc66d79adee78433d6e0c31ed8dcb08bda1cc66858ee40fc0177b60a47f7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOI761307010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae58b6ecb52809d44d69a94c13af21cbb975d37d979fb9174433478d208fd1e5. 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/NOI761401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc696c409c94bc46d8a4370c8fdd73399e604225feb3288bbed5d398d56293ca3. 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/NOI761401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44882042f27dc0d9f9d1a940c26a65637629395b620d4bb3b4963324e91fc0d2. 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/NOI761401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d067633781ee7ecc1b8ea1c496d4ce7b49f0ba4741fc0fb92b07684735738d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOI761401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303dcc3df33119f4045046cb05044e57282065da9e5a367a47f184df4422eb67. 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/NOI761401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9da1b410e190586bb468e609a474bb3768ce1a1997f5f74062f83a98e789bcc. 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/NOI761401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d5f8cf4750fb2c6c76440a511ccc70bf2460354e2666f66f09948ba8837df8. 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/NOI761401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7ac0d2f7dbea1576e3e2b1e9e15b430b37746c3eae62569145137701f2ac10. 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/NOI761401130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81a59a36c4d232d11044d9ab75eedb7a954296f6378c64d9ae9c0e049f4dd56. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/NOI761401140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fae32281754feaec469bfc521fe631beff1a41df430b7bf8cf392c5ad26d705. 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/USCGH1223419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd2d9e0f826955012dc8998cd537474301e6718db3e5ac6e2ac5fa7826816f8. 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/USCGH1223423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104961bd66a903a094298f8cf34e215d93a8dde1506ce71e8478f57af5bd37a1. 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/USCGH1223426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bf2e3956bb831ace62bfe8df3825751da1edbf850dd74bba4968901fd50bf7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1223430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075e61dc749c5e0dc4319ae83730c9ef36496362629c31d124b863c70c33e700. 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/NOI761606010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8e2effb9e3ad03464b2b311838ea06c3864e55a5628435ada6cedb97caaad0. 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/NOI761606030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4dc908cb1ee3079426938b36c29a843686904131c2176c2fc21ac9b0b5166a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOI761606050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bb347f4116e0ed4cd2735d6669525bbc422b0a4693b85e8812b5c381af8fc8. 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/NOI761606060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c87b358d0d44f3583957c3a34fb2b4c1fa30a9825bc5eed68d55057813314f4. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NOI761606020.
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 0xf17653bb287babd44ae165d5f5ad5ebdecc78b769b1686f6013ae4ac6be8e996. 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/NOI761302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3024b0d58ef29d17fff8e40f1fb4cd4897640d779a4a3c84edb06a7d9fc426e. 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/NOI761302140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93510592397cd46d2d8e871fc477ee0b822d9802b42c943e383a765c89be1a6. 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/NOFFM1461010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d11449d6f7a221afd3ffbf35f66a7991185154c7cec56433d4ffb980de4687. 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/NOFFM1549010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbcdc962aa73258e87b9fa0a9ddd9dba723539701f586370489310f308b03e5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOFFM1605060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05fdeaea4fce2ff8121c445256b85dd92ee96782e302b30a64a36f3eec1408a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOI761307020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd9a40ba1361c70f2a9dfe5280e25f9a24401aa9a62deb92c95d5dd09e36682. 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/NOI761307050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2ec044bda606fef4f6a1fbace850e806a21e30d91e2885741c5c5abb9a95cd. 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/NOI761307060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e298fa47a1f47985bd6ce299946ab3314c56681e682589e5ab4fa2bf6b54726. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NOI761307040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1169f7d1c4b1876ef0db7fd5459844feede4ac7d199416c0dec36b08c5712a22. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOI761608080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08075e8f35ae13a60c5c4ee0dab83bf32d4590121acdc80039e18b06f4886fd6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NOI761608020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68eafc6bf83c77836a44d3b75a34248d5c61a4ae13c0578167ff4f8df6a2fd5. 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/NOI761308050.