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 0x67b9d3294ebbb0526877d7628ce1eb3fe8cbf65dc87950a7b6165a1466bafeed. 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/f173d6b3-ddc4-47d7-b985-a04da0ad4023.json and https://artists.proofprofile.net/proofs/artist/f173d6b3-ddc4-47d7-b985-a04da0ad4023.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 0x0cf9c5f9b6f13e9317ed9f7fd86be587e2ab4ccbc4d1389d1d8ea49c21129eda. 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/GBHLW1803307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04d51d4298dc72d287e772c03c0f8313549483f7407f393fdd3f564e7b11e3a. 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/GBHLW1803308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03408294e5e281ac3faa43085de1a84cd7203ac6fa2f76a5168e00dcd911a90. 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/GBHLW1803309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a71bc295047812b795df1ec190b7e472f0245b217624c059b6dab34ca95570b. 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/GBHLW1803310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce471ebdff7aa0ff007390c5cc1059d83aaa31292c01322f8960abb9cfae213f. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/GBHLW1803311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8250dfb4acee24998f865f19237454b84acd2c86d2a949402dd95d3b1674379. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBHLW1803312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cdfa0dcfd5c2ac15a3eba83c7576b2c86580c0a8ed814542a7e80eadb6e55b. 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/GBHLW1803313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323b9ee26e3b5b737510cf8bdaa2fc5c30b93dd63aa6648af130e2361068f510. 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/GBHLW1803314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee873981e2ef9a160e7caa2df01aa5741042fe4616d384950ecef7b7f7913656. 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/GBHLW1803315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe408e65ee3d71deb78a31313ce8d2c6749f246b4c8204291d922de82bf6e59b9. 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/GBHLW1803316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840cf02e3e0fe9338602e25ff52a68a8fc1cc3714e6a6085524af594309ac53b. 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/GBHLW1700398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b6e475a2c8ca348b71a9bfd3d7f7a47d7dbe80f06712099a1818d2edce87d7. 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/GBHLW1700399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0f466ea832fae1acedf01f87c7f29a4a210f3de42e9d0ae479a2fbf447c12. 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/GBHLW1700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e7bae87bf416162e00f65020f789fc435463a6e004433fda847eb7286da1c8. 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/GBHLW1700401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec4188d6e299d9e6be43639662ad60e6206732638f97ef1a244f0872321136b. 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/GBHLW1700402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b983e8c6e0569e1132ba9158a1213470fcdc12e005d2fa530cb37c58232ff8c. 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/GBHLW1700403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf54e94ab1eb539f891b41e8fbac5d921568d4baf867f2eb9a8fe9b835f9b5f. 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/GBHLW1700404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106aa4a6ac4bb156dea7a6ea0e0a6a2f20c11e1fcffcaa248b237762fbb359a0. 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/GBHLW1700405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2adae16157ed0c54cc7ab12d75e72f121f8b8dd3b3238650728b7514cd53e50. 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/GBHLW1700406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3701f34ee81a85ca801420b848a9c9df17d3fd15ceda18d5c4c4b8f74f072ff9. 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/GBHLW1700407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf7727d5a88ae7544987f81036a2049f836c2effc627c0d3eb9066a283bb88. 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/GBHLW1700408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926e366ce287d400b954aa5d5e2abed203f169e8fe3d5aa5aee1f31820016ad4. 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/GBHLW1700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d48fe8de8ee859d8780af317413cb7a28dd8ceb1604f8581463d328be2d283d. 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/GBHLW2300917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14d58210917a09f1dbff18809dbedda9aa47b35ae482bbb3b519a33e1d5a1fe. 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/GBHLW2300918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9a84a2c763dd7c97908b337718fe5a77f5e469987f4149fb2d4fe768863f36. 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/GBHLW1903097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2259b6b4d191367994675352437b76a613b92c7d0748abc85b63f5167f50c8e2. 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/GBHLW1903091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9a84a2c763dd7c97908b337718fe5a77f5e469987f4149fb2d4fe768863f36. 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/GBHLW1903097.