A Barca is an abandoned hamlet located in the municipality of Cortegada, Ourense, Galicia, Spain. It is located near the Minho River and the Portuguese border. It consists of twelve houses and measure
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 0x9391067c16a5d14de8a49d3f21777e56e1792b52728e76db6b94032fc3783d14. 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/0d4298e1-1060-485c-88fa-bdc3749f7ec8.json and https://artists.proofprofile.net/proofs/artist/0d4298e1-1060-485c-88fa-bdc3749f7ec8.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 0x6d8f12d6ef6eb7a13938858d45c79e5be1d8f92c16e4405abb76fb41f1ea61b0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BRR120500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5a8579a0540079fcc45285ba42e57b8d1794133169e06a371eb677b3b0eed3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRR120500152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52448043d6ea3811b75d6344dfebaa10cc1614f83a2c1376b43d2208847a211. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRR120500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5ef77b86bfb1f4b9718c6e5881e93cb6d30a2b943c65d4c1aee9c9d93ef4c4. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/BRR120500154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8ac6a84c25fa008e43f2c021e36f192fca074d77bf811cd6702182dc56d1a9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/BRR120500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff2a376d10cdfc3c82bc45697b8673743c514006cdee894f55e4961bf56549a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRR120500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8f12d6ef6eb7a13938858d45c79e5be1d8f92c16e4405abb76fb41f1ea61b0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/BRR120500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5ef77b86bfb1f4b9718c6e5881e93cb6d30a2b943c65d4c1aee9c9d93ef4c4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/BRR120500154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8ac6a84c25fa008e43f2c021e36f192fca074d77bf811cd6702182dc56d1a9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BRR120500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56d84792d52cac582aa17fdfc02116afb1bd7d67746a5be36637e81fc185038. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/BRUME0800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c5128d218488b55996d7f57b8cd167d762c184838e6ccd7d6f3d0018e384bc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRUME0800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45891976813904bc8147483befa0e7392cbf0791387f7b391136cf1b2399794b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRUME0800046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86afca997e77753ca63730f185b8730029ccc325d82a7a6011035b66078e2952. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BRUME0800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8420cc452762fac87c582ead95bb773c811e2f493d70b7d7c62dbc8cf92ae471. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRUME0800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4cddf58eebf0668bfd338fc5149ce6dce8668f70f97714a6b5808bc2ef7f4a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/BRUME0800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11791ee2040d9232af3f6ae4854de4a748a305ae01bf2ce3677393ac8b58e31. 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/BRUME0800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15978cb79ac594b3b9974da5d8231f7263115d881160219251056573f05975b7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/BRUME0800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a4c884ff0db6b56f86f8470e5873b5c014e91335ef940ff5af4555f3da31e9. 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/BRUME0800052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ed5fd8f9eceda0dbe728c82e6412416fbe678a22adb50226468d79e8d39d8d. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/BRUME0800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307deff3075482b870fe76d453eb3e50231566092f72efd50c3612012a69d91c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BRUME0800055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb541ac81080d32224eacdecaaf84990ca28ea4bf850a2cb5ed4d863eb26cd1c4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRUME0800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c6d929f1a3fa58aaafdfd857eb51518a94f9152fd32f8e58cf338981638f00. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BRUME0800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1f0ca5a63345dea35e74c301924b62fb5d3b00a335dda29e54d628a844e140. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/BRUME0800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0800c265adb20b4401625d969c9cc9345be4c96551d8e0eaa144d29c3bc6be09. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRUME0800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb14a6ec51a086c02ae1768679c7583b56d4738d7be691e6e5cca61d11bc63f. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/BRUME0800063.