Tony MacMahon (18 April 1939 – 8 October 2021) was an Irish button accordion player and radio and television broadcaster. thumb|MacMahon with his accordion MacMahon's chief early inspiration, accordi
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 0xd8ac2ffc6f020e57b46abe0aed359aa7bd4e70e49a6f14fddc93f569eab68f11. 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/6b498f16-3c1a-45af-8f3b-a710e094839f.json and https://artists.proofprofile.net/proofs/artist/6b498f16-3c1a-45af-8f3b-a710e094839f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Maids of Castlebar / The Collier's Reel - Live
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 0x194a17d11b7159305bbe3cb3ad7a0ed50ddd1da0ac1c3ab6f17bed7aa4dffead. 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/IEAOR1200045.
Lilies In The Field / The Limerick Lassies - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250ca7adfde0923ca9fdb6bb20a905bbbbb92bcc733194982ac0174c6cac3d4d. 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/IEAOR1200046.
Gol Na mBan San Ár / Cnocán An Teampaill - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3aa8e231b3200d7a91b479f63c4238be9bb7d80bb6b05c091e8d5155b7ff37. 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/IEAOR1200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9930abab8e00ce0a09c3ae567e863aeb61379d1944f006265b46e0f93cc69f26. 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/IEAOR1200050.
The Rainy Day / The Merry Blacksmith / The Silver Spear - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46d5e2367bc9a8f89dc51b6bfb8fe87ec05cb99d4ba22338b01efb150100bca. 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/IEAOR1200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70757865e1f0ed839ea13c702f4d744366ca5661c38972a59e02c865fc6e82f7. 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/IEAOR1200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3268ff9f6d5b8326cc0430ca1d0ab53544fdea68c96d64542096be5fb5df7769. 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/IEAOR1200048.
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 0xfa64d420b83cb0cc5d73ec03372341cd291ae711a87964db669877f1bc2cc0ee. 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/IEAOR1200053.
The Lark In The Morning / Joe Cooley's Jig - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e039609a5bec04b8b5f4a180cba6521d53179fb84966e512a57c0472cbabe1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/IEAOR1200055.
The Bag of Potatoes / The Bird On the Tree - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b99bf5b0e30d7428ff0a24dc5229544409d97ba5a7b1048ceacf0899997dce9. 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/IEAOR1200056.
The Fair Haired Boy / The High Reel - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876ec386a206c96b4ff1bfec98294d6584b2321e6faafab6448ed78a2f303604. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IEAOR1200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fff4d0501255fcb05aaaf7557a212b484989247344a0f3eb64e813e93fa35e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA560560956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098f0dafaa46c5dcc13f606ddfccf50f3165fd14afab3ed44866fd0c316c9fa5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/IEAQY0800027.
Jigs: Humours of Drinagh/Trip to Athlone - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cef6b11a58cb5647b947bbae918f77a3973a9e0af2e1cc8b201a7c11283928. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/IEAQY0800045.