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 0x29dbf588281cbc36f5c134561a10e1887df790b4ddfdee0062fe626d8f5c79a5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ea3a50f-446e-4fe4-94ac-9e798a358314.json and https://artists.proofprofile.net/proofs/artist/8ea3a50f-446e-4fe4-94ac-9e798a358314.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 0xfcc49b0f7ca0e8cd379ace939510ef452506f7c8c963c51abe8d9bb06ae1c701. 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/RUA1H1753731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d489a7d0e033f8da835b02f8ce74f8fa2991526ca47ebd96b27831ab0d9ec1c. 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/RUA1H1753730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6100473cb86d73ef5f1c62f32f4328c3002bf4481c4b617f2cd4a1ba45c36e7. 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/ZZOPM2118135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441b97b0211edba92d6abc42d344039befd394263cbe51440deb9223a5b5b988. 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/RUA1H1753729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6329c746d8af45c0b273f7a2eef77e89788737812a585d2cf9ebe671510384c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/RUA1H1753737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0665e91a259285fb72bb0ce566de7410e1c35d9ccc2359bf2d35d7536e4fca4a. 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/RUA1H1753734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576ce99ca96e3e8a8d8c60948bbcfceea258bba8708f3683829dda8f3a241d55. 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/RUA1H1753735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb9b0d3d609054ebfd69848d6793ee2c64eef649720f11e33253ac3be120c6. 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/RUA1H1753736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8665b40ec4e22dbdc1aa0bf53e4a838afab10c9ec4ff7b429e6af95fe04b79. 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/RUA1H1753728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088f37b4ffaf7eebd1f491650f7ff69cc2017c2683b517f52c73edb013d71e63. 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/RUA1H1753727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132232dbbb2c1abf82633ba2ddad51c181998f5c125ca5b7b381556461b082a2. 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/ZZOPM2118137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc9f35dd1140d4f4d32c4f9ba07bb66a05d9848adc9fb6677bf4cfd4aa919a3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/RUA1H1753733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960ccc456d14f3111e2c43e8c6a548f930048f901360c5a7b2ee0de56d4b7262. 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/RUA1H1753726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c91b3ebe990d3f723b6eaef4b6a4af57258fe065d8082871b8b74e3da75a16. 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/RUA1H1753725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9eceeb3748291e11f7458c17193b817666797b4892bb2bdf209d9dd4a0db9fc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/RUA1H1753738.
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 0x971503d0ceb1a4dae125f45f2dd8a4e56733709e617014402fec53213656f190. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/RUA1H1753732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4378ce4a1026fc0acf082b8dda97502dfe99d14c0b51e65107f7185be6f2fd. 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/SE6XY2204092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fd6fc2c14f03e25dedce732dca5a7e774d8d40634c743960a4081522c9dedf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AEA0D1828526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e2bc9d6308c3cd90e8ecdf6adac04d287a52bba7e5586d9b3a416ea45b82a. 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/AEA0D1828531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e744627e1affdbc4950fce84051689e3f7e448cc53a8c5f35ad1f15e920d21. 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/AEA0D1828522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830affcde99383865d70d0221dba80228dcbadfde0c4434cafa27d81ae4006aa. 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/AEA0D1828521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927dc2bda3c8a43ce4f58151dc6198cfd86a35a0ca19667b9ae92debbacf1f01. 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/AEA0D1828527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0c5554a0d652f26597090d10b6843da6901e2a24f6208eb8534afd909a4e6e. 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/AEA0D1828524.