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 0x1da10bdae75351bf8a266a591824970d240bd8dd5da9aca7f9d6408a93be74b2. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13285261-de19-4241-923f-7e500bf9c63a.json and https://artists.proofprofile.net/proofs/artist/13285261-de19-4241-923f-7e500bf9c63a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Choral Scholars of University College Dublin
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 0xced6c766261d509483c3e531df0b39e1addd3c8d21fb74c0b777584287df53bf. 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/GBLLH2486416.
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.
When the shy star goes forth in heaven - Arr. for Choir & Ensemble by Desmond Earley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc24010d41a8041233fe6408beb544bdf3295ad48849be819077e7b5debc04ae. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBLLH2486402.
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 0x3f1208277dade9b945e1646001de3acfbfb267ba7b01dd951bd5d5b0e2d9758c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBLLH2486403.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1d83bb8debcf314d97d0c07c6e45a7ea85c10d4d18bd4ca0d30a39d5e4a243. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/GBLLH2486406.
O, it was out by Donnycarney - Arr. for Choir & Ensemble by Owen Brady and Desmond Earley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ae917cc897d44ca2120501f13da8d3062b5c49fc9abe4f75f76e705f027a0f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBLLH2486408.
The twilight turns from amethyst - Arr. for Choir and Ensemble by Desmond Earley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e27be46169d4e50142618eba0b7921c063d794d4ee8455070b85d2a1d8f75c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBLLH2486409.
Sleep now, oh sleep now - Arr. for Choir and Ensemble by Desmond Earley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f1b6226e2dceb31a559e7d0113e9d3837627669f2ad48e8aff8fa3a5e29b10. 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/GBLLH2486410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f60fdcf235ff05f8feb717d4e9e27d78c3ce0a5b2a7eb2d67d43fb71f48339c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLLH2486411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6804b31f878ea69055d3b3da59d45cfb740546e0594e2c45d8b7385b5357b59f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBLLH2486413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c1eae4d3c76d1c32dcf3517744518be6f1a85453e7269d7563a4e1ea5566aa. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLLH2486414.
Now, O now, in this brown land - Arr. for Choir and Ensemble by Desmond Earley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d4abde9464eb16868d486a628ce4bb24fb8a1f17b6c329b1dd8f4602d89eca. 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/GBLLH2486415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cb2b2d94542ab6b9ae35335b52cfd3aba79fc415f2bab2b59f3b5aa0095814. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBLLH2486417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a51a233b25419b6fae55e1df2a02df8484a454bc222eb963f5e66990a196e4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBLLH2486418.