Mackan (Irish derived place name, Meacan meaning 'The Field of Carrots'.) is a townland in the civil parish of Kildallan, barony of Tullyhunco, County Cavan, Ireland.thumb|Road at Mackan (geograph 291
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 0x6b19f5da1f3094870d299dbcd7d51b87662e908377faf0a82cccc626a5b80850. 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/7b99e272-9473-41b7-9336-73c9f90a9ebe.json and https://artists.proofprofile.net/proofs/artist/7b99e272-9473-41b7-9336-73c9f90a9ebe.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 0xc1dbc12a90d8270b68517f398f79bee5d573a5683e415ce29e52599c1fed7ce4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE62M2143984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654d526513802d34b0305fe859cd94b3b2925c22c0c9febf1ef1379c982aeb97. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6I32189092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48709bf73e25d4dfb91a13ccb65686beb84ba5537724f4d576550a858c4c8839. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6A92146915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b27c90bc2e7709ab1549bcf59f9df1ed49a6347cfcb186b9fccddda1b3ce16e. 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/SE6TI2144145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959a4d257b50eead762194a35e8c0169b145b171545a7982d227d68baedcf119. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2153692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158776d82a0f3423cf09912f4eb0af362591751558f2e2c9db87a626a37b1306. 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/SE6TI2102463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa308f9e5dfe6e9e67ae0e51e085877168112dd6bb027f3f6739c1316b4551317. 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/SE2VK2200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dfcd9185b07d05cf927ff83791051ef89347e0b0bdf6e0c6f723dc21de61d7. 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/SE2VK2201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe1a5b2f1a3768f22ca14d3481560d91d68a1a97a4688b260c4b8a7ca2be21f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XW2236249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795ecc2098de254f4a31c81e00bc6a4bb88aa2400059c1e35340059701659863. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6XW2205898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c90f43bc83320cdf97f426ad52d9e346226203884d7ccf9f6d5e8785d68edc. 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/SE2VK2201201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c66446de789b2211a05a1deb9e6e31d43b145237da2b3f3fbf6edf8e2f9928. 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/SEUM72200948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6b5279e16f816d888bdd1b568439dfd7ef50f627e28a11840ae9daf0caa6a8. 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/SE2VK2201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343c8eaeb2f36a0081f3e849733379fdf0d3f535c4ccfe25b34d782b1fc2d949. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6I32236487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d85491867c1687c5a4d86d02062a8cba9b12f9dec0ee6d911cb1d9eba48ae8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE2VK2200401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d18af26c20a9b0443c7014e1c7faab634bc7a70092b9003af3ce6897c1a7ce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE5752246052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38579cfc718d62ce6c2eed888984cdbc8634cbd3d247b4505951608a48ff1f8f. 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/SE62M2197189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f9a0d3eccdc6f59dc4ebc17e65a348b93e6f7acf4d7f97c788c1eda15fa949. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6XY2117620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5d5fc1a658c1af0f7c06f9ad6902a9dae544b50eb22c271ea3fe90296e3d50. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2134552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23181a29b913fbaa8dc7116679102ee5ab00edbaa7b6490ac20bf179f50997d8. 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/SE6XX2145446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17e1131ee4ea4cc55e460cb1fa73038221ee02ef71582f62fdee5e2dfe9fe85. 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/SE6QE2143543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3940fcd10787ddbce33cd72294c9101315b4717e74b5297a72eeb3774b76d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6I32185407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe915e4b0a23de4f1744b6f308c1d15177e9422cf907d4e45f5b052b9803e9fe9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6HN2189120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092162a56f7b2af52fa56e13691f8292d09ac8f8b2439f2368e829b684cecb92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6HN2102538.