Turlough O'Carolan ( ; 1670 – 25 March 1738) was a blind Celtic harper, composer and singer in Ireland whose great fame is due to his gift for melodic composition. Although not a composer in the clas
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 0xc5cf8257fd5023c677d9173ec43fda981b999ec29656c81e285f960dcc1c147b. 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/4fce7dc5-c469-4e33-815b-d1d845924eef.json and https://artists.proofprofile.net/proofs/artist/4fce7dc5-c469-4e33-815b-d1d845924eef.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 0x1f4823969849177c31eb2b903e0950aba9a8f42e8eff316bbac3fc59f992c3c4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEE479600214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673b38abd2e46715d3e965cb2b24e51d54fa1247cb1fab83e63b19737da29b4d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEE479600215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9449a533273919f35f64abc5f99a4c5d1c5111058e753132ed41867b8d840473. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/DEE479600216.
Carolan's Lamentation for Charles MacCabe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c34a1e5b920962a766b711d80d8fadd972eff6d5c12a5efbf9e8d64a8ffae3b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEE479600217.
Carolan's Receipt (John Stafford's Receipt for Whiskey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6f85349df4c964db41f7a65f6db7a0bbc08a5fed999ee5bd2a5e624ccdc611. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEE479600218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3576a3ec3e495c9ff6747f584ea134139979572164058b9ec5adbd2f9a7a3c6. 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/DEE479600219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777450f6ca6f2599a4edf6ba132ea687b84dbd08e1a2a94a2f0b94e8f0b7b52b. 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/DEE479600220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ffacd8ae98369145ab924ad1485cb8297250651231c7180f2ba7dd589e64c8. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEE479600221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed2ff743031bad260fc595103e5e3e6c49ede9add36cadd5c9ea880675b4e05. 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/DEE479600222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6c2720789f3527683ca48c2ae748fff153f6dce8dd761666d833dfa0bfc0fb. 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/DEE479600223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462f9fef1dfdaeec5a01f0764893d578ebd7c1818a4aa0fa4df120c584f5c7a3. 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/DEE479600224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70fd4cda130b7b3a4f737c50846cf4ea0e7b79d5900e66a45bf6d3ced333b44. 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/DEE479600225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa080cab2e3e9c5f18bb64aebf386f29ea43691d5343ea86cd0c6201cc7fef17d. 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/DEE479600226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc362fa4e833e523a77b05142a2327c787adee6a62d3ac1d0016e33dc9aec69b8. 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/DEE479600227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e98d7661959b4d768941c697f5c9ed34e512c370aa4bff8a3044f27b394f17. 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/DEE479600228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11d4d5748b5459ca5acc7c6f26067e8fd1bd81bf396d9c7134b965678e92dac. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEE479600229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822966b288eea864673f8574ee977c9ee1edbb613a6f05540bed785fddddb959. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEE479600231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3acf44eac87cb366538bedbd937599a185f5c5c24f1d567346e9c07bf3c643. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DEE479600232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70646a6d8a6a581b1b1f72e23673b7509be096adbde054cfa7f196a4410cb2af. 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/DEE479600233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecde30446b2cd142d9803d554dd0214ea2b09142db6d3f3efe7f27e69ced10b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEE479600234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aa470d2cad2071a5422ecdbc48a674c731d3ef3c3a83e5d7e9118b9dcea2bb. 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/DEE479600235.
Carolan's Farewell (Carolan's Farewell to Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d23af0fb268ca0984f838536d7340f573ce11684ec724fc6795552a1e90481. 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/DEE479600236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0f813c9f62945ec732fb10d323b8631708294daf0fea0b08138ed956ffe437. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEE479600237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec2ce2c4f28da6ca5d4c4b7103814e64b75003e8a4ffa79ef5cb30396bdaf43. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CZA160200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde796f53884eaad637d52a9621a6c7b859591ae314c4668041541ff326cad64a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZA160200047.
Michal Hromek Consort and Guests Play on Themes by Turlough O'Carolan
The Music of O'Carolan: O'Carolan's Dream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6572e7ce49ca9072b7c1edf428d55e55642c08f97a220608428d81c8ca8a45. 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/IEDWM1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9465cac173773623416f735a7d54d77817266b5101bdc936603cbd24af9c1d. 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/AUXN22190679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925c520d44c76ef578be9870553294e8c04292a6e4c8b25483f2775f4413526c. 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/IEAQY1000018.
The Lark in the Clear Air: Melodies of Ireland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8487233692692069ae5e70f5364c1facae06884c705a0b4aa8051654169befdf. 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/GBLLH1900337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8afefce82ac279a0fd0217610b2844e5adfa411eca40d375eda59ef75b49af8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IEAQY1000048.
Owen O'Rourke (Arr. J. Williams for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e93da464822c9c791af514ac83c31ae431c8376dd4e6500537563eaa198f62b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBYJB1800025.
Farewell to Music (Arr. J. Williams for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d6e0798248e8fa3e2f5c5a022267404c497b10fdb8c593f7a77a6dcb7652ef. 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/GBYJB1800026.
Carolan's Concerto (arr. J. Williams for guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5bc9dc89169ad21ff307121e4b2b2eb839c3ce72975c2566111089cedc7196. 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/GBYJB0800015.
The Little and Great Mountain (arr. J. Williams for guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dcd007a34581d2a428969f4d07027467f6dc1a6343127342cebf9040c4b74e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBYJB0800016.