thumb|upright|Hansard and Markéta Irglová playing at Cool Discs record store, Derry, Northern Ireland, April 2006 Glen James Hansard (born 21 April 1970) is an Irish singer-songwriter and musician. S
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 0x72b60eb1e8d02fcf30cce906191fa38402f359ab4b65b5bed00fb3ca89260ee6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6acb30d5-f1bb-4cfb-a193-07e41c8d3c69.json and https://artists.proofprofile.net/proofs/artist/6acb30d5-f1bb-4cfb-a193-07e41c8d3c69.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 0x910f0581349f91d50688b9595e6490931855e9e94992bb1a1d23bfd0a2e53db5. 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/USLIC0700662.
Mavis Staples I'll Take You There: An All-Star Concert Celebration (Deluxe / Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ba325ebff7b00355129261a9bdaf5b6452ef2697ef655cd636933617832dfd. 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/QZ7KM1700020.
Cyrano (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890344016177f1dd0127324055ac93546d7bc075e9c34f4e7f50233bedebc915. 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/GBUM72105541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd18a3a72893669723134911d67ff775814e9c69cc99ac4c7b52995e375de35. 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/GBGRJ1030435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb825360730d0f5e546716ad85ee1aba65a9b5871b8af19350436353385d70426. 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/GBUM72105539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e0c9d6b757345148fe6695e76144d6d181e33d7db3a08d787acab8de54ef62. 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/QM6XS1574828.
Forever Young - Live At St. Patrick's Cathedral
The Busk (Live At St. Patrick's Cathedral)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec065b2af7f3b75cf926f35dfd49090bfff0eeaac37f3c7000678a79b7e6171. 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/IE2DY2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9256bfdc9ab4d998266bd969beecef71d58d48833472e70c11c9c65506191cd. 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/USV351327142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41cccee702c1f00b058a3b0028d29e62473019af6b7241fca007f8ff2e8ac1a. 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/GBHMU1300155.
When We Caught The Moon - Live At The Lobby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b161fe7548bf7e0d1a5e874a9c9e640eab8b18115aa9dcff8b47b6b6841dc13. 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/QZMEQ2161070.
You Ain't Goin' Nowhere - Live At The Lobby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacb2a43ec7d45442e1775467fa380ac5b6502b2f8e9317369ab9c7d99f7e656. 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/QZMEQ2161074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c197b25b44bb15535a06231032c988f76640bd451ba4a97d7e99c7ef88e841. 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/TCAAS1052742.
A Irmandade das Estrelas (25 Aniversario)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe47b333ff4d4bd2f6706db2a6d7e9b7d94cebc9f1e0e51664465b7336b30588. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/ES7012100008.
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 0xa8b8df4ab1907d9a674a28803ce87ef1c0b7683aec46c6e769f26e709d4a8daa. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZMEQ2161069.