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 0x4f168b062950c0d0c16d4bf001e81911814aff88334c8f146de54dcdc4dbb2e7. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd086db8-3cb6-4571-add3-e7b527f9c583.json and https://artists.proofprofile.net/proofs/artist/cd086db8-3cb6-4571-add3-e7b527f9c583.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 0x98a33ca9fa409db47fbf376c0dcf7104294f67747d2f14fc34b869a236c44cbd. 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/GBEJP2219101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ccae3bfd64604c73715546435277f753a8dcad265292399d81a2d0e4b9caa. 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/GBEJP2219102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77d193f812e0d14d0090087940d5fe1e565a9031f330c041345f3afd7ed97bf. 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/GBEJP2219104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8f03f9079fdc5b92097f5b749f627357d72746f6e05aa8607f0756e68f3348. 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/GBEJP2219110.
The Choral Scholars of University College Dublin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb2436ea0967d14e23b4ede1768656a63e971574abd145a6d4108f12c3c2e45. 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/GBLLH1955801.
My Love is like a Red, Red Rose (Arr. Ēriks Ešenvalds)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185301b99324b6feee5ce118cd336a76bd4c2d8e8566e6cdcca0136e6de5c5b2. 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/GBLLH1955802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8090c7772f0210346ff21f6be120914dc8e0fb9da1031fcab177802261bbd1d. 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/GBLLH1955805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbee0fd3b0a2f817520beced4877d78f534538e92b6fe3516743a756b060d891. 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/GBLLH1955808.
Bó na Leathadhairce (Arr. Desmond Earley)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4ff94a22f8902ef86b6e469c8ed2f3f6814a6a44054751475b723c78df9e77. 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/GBLLH1955810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd05abf3ac064f74dd92e1d6e73c25599f55b6f8ef738a37b9f0b55263d0300e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBLLH1955811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5278233f47d95ce63cf439099caaaa98c729f11ba981c858e5d62d8156a8f21f. 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/GBLLH1955812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e952e691950f37fb81e0b5141dd9a249d48c23d50bab146b3ed3125f7f82246. 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/GBLLH1955813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446e21e464e91455aa265b6b8e3f0cd8cad1e5b76c256f59efced78087d2b1a6. 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/GBLLH1955814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023192c14a16a628af8a458d8e2ab5186678ef1cc2cbd39cedd69297689894f2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBLLH1955809.
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 0x462d2ca01e4eab76ca530600fc9d9d960f004547cc11240416d2e44c8902ec99. 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/IEPET1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4036c2880a9ddd9a17d12a5da60ac591f1ab627f36c99b130fd4812daafa3d7. 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/IEPET1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a43d5b224ea6a1e2f72f0117075fc76a5b33d491b6f30654d323ea2eed1ff4. 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/GBLLH2486401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b7b84a9bff2d395cb05abf47c2839b18d69ecaf45dd8e5bf1c1c9db8ffccf2. 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/GBLLH2486404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d9895dfda41d3a0934e647cb00a79fe0d30e6f02cd3f43fa9a7e241626654d. 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/GBLLH2486407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ce20110b167626c04ff7895a610a07ff97e0c45650be58b27eac640ad72726. 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/GBLLH2486412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced6c766261d509483c3e531df0b39e1addd3c8d21fb74c0b777584287df53bf. 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/GBLLH2486416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe768e4d5c605e357c7d5f937c99b85aa2e32eb00e5e22b40a11efce89048705e. 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/GBLLH2486405.