Artur Mas i Gavarró (; born 31 January 1956) is a Catalan politician from Spain. He was president of the Government of Catalonia from 2010 to 2015 and acting president from September 2015 to 12 Januar
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 0xe97089841b23221d18679e8a367c00b606bbaa14d963c16f5da97f8a3234aa87. 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/7d63e1f2-ca99-4660-9643-96b895ea4971.json and https://artists.proofprofile.net/proofs/artist/7d63e1f2-ca99-4660-9643-96b895ea4971.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 0x90310a7ef088c2cfa086d5bfcd19f4e371884e630db4a66987453fa323c8d748. 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/ES7931800442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe16ddd950f9d75308d0d59ecba5fdf49641f2687499d1e64909e249032f1c0. 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/ES7931800444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05555f559469d1f39d7a633fc3757781d856a3d4bb8ad59a4a0e66015bfd028. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES7931800449.
Capítulo 13: Conocimiento, Campo y Conocedor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf043ea9a6355d6f88ac1be2a285ce09e2667be1f80d0e6abe13b1f70b1d48b. 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/ES7931800455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e0f3787b59de9079b635c8c58f49d80103399fb60ba1a01384043f1fa14bdf. 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/ES7931800457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f20ff40c7b4bf505ab2e56fe72ba48ed9adad6bf5c604007c14cce941baebf. 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/ES7931800443.
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 0xdf54f496277ec6f15a7a405518e5888c3d604a372d4ea60237636de9452c41e9. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/ES7931800445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1c32534008da16f2fb17c146b5cbba1e2300022fe1b7238bb449bedb081338. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ES7931800446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf8870db4d8d784c9edbfac6d7de47928cbafcd1e3007ffc64e215081b7fcdf. 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/ES7931800447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01f8fad948d2cfe830e17191adbe1974ffbf023b92686ebf8152273af954297. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ES7931800448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93c7e997da3f8b3cc8af6cb971ea737896f50dab5089e16ea30f3ac5c6c9e7f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ES7931800450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ec0f987ab6a9c6b2c750fdba133ef90a8add79a9287e7e01eb4115051c731e. 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/ES7931800451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e55d1fef6d4acb5b8d096c0374242e03e23f5df279ed7044fb1b3f716bed6d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES7931800452.
Capítulo 11: Revelación de la Visión Divina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083c3af9cba26d3ea59bc94c2ecc54fc97fc9c3a6af85aeb736cb7d393988846. 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/ES7931800453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fa1accace9b42cf7297d238c6496578b8ac9d59e0ac96bb1934bdeaf5ca93c. 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/ES7931800454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f58b778e4bd292b98f530db3ddd7f55594385fb21563728ac45e869918bfff. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES7931800456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0003cb651beea42f2489d503631ffe51938cf3b9b5dfba8c7d691f76314d0edb. 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/ES7931800458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb301d180a25b67e869f6100b6eed0d6a9bb994f8c3011af0503d0c52781a9678. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ES7931800459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26fcdfcf139881588084101ca4ae0884b7b199ee7fae940c0862ff8873ea66a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ES7931800460.