José Vital Branco Malhoa, known simply as José Malhoa (28 April 1855 – 26 October 1933) was a Portuguese painter. Biography Malhoa was, with Columbano Bordalo Pinheiro, the leading name in Portuguese
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 0xe832c6ff6a1b18b0b9d01966dbf1ff16fbca847d7f99468014bb54350958d875. 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/e6992e46-cc09-4068-a478-576c40e59ed3.json and https://artists.proofprofile.net/proofs/artist/e6992e46-cc09-4068-a478-576c40e59ed3.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 0x3daf622a190a78345340cd03213d50bef71fb3ffe7718d3ef978e207a736570c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PTES19401509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5154db290a0f7c7abcfb23c83188de05b3a749792907c2b2b9dce06f67cfbf7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/PTES19500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25653906cfbf75f45d66bcb52eb25cfba9a919c8921ff4bfae0148310e586925. 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/PTES19701511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9535ae40c2c13991e6baacb766d14cbd9abc5ab31bce26f06686b786627cb0ac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PTES10100902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5c3897f912c904bcec05c7b957e6777ced503da4ab3c33b310c1ad0cfdb890. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PTES10201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d2a7667e142208e51ffebf97ed340d769ad1a1c794b02a63360594ce0d7bb7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PTES10201112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5656e8d8d5a61b186371b3f55011506f3eb388d5bd8125496c4e90086c530a6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PTES10201113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c48026e17787cb938546bd96cc3eb4c168c290ded04c5b0313c456ab87f142f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PTES10401102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861913aa958e32b0936e762d179a3e4f4a1a4e2517bd9ba8db1b416660c0e738. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PTES10401103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf8b38d45dd516666a0c68a2832e2d869260750793a6c16dcb8aae6a1ccc053. 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/PTES10401105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b721bfe0a691b8ab5aa706b2721cca56d24da0d20c95a4197f079ce7f6902d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PTES10500703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754fd3cd724d6e55c020f2cf3f57353485c11e1c66a1f1d8a10f7f75aca9bed4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PTES10905401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c68ba11e5c297847c040ceccaf6f83b34be5a0b391028345e76086dc9f56e52. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PTES11205201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe289db1b08da93a6d65e391f560f6c82eaf2f757d7c7c28c9124a5a1bec34e63. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/PTES11604101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5743ed7a7d0033faa3f9fc52a848987d91c1f57ad640320d74d1281c23eebf. 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/PTES11703608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe8205c89aeb8ca7e79a69cb6c41b603214e14f9e491626f604fae69f9b0d89. 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/PTES11801504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cff8261460145f2838630bca34194e5bb8d339a943e6988d29dce931e86daba. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/PTES11904101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15929d1d3e939d8854613e5e694bf143593e3389f53e0050551db1d63e6de3e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/PTES12002401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94c3bb68b4d9ff7b9ed7663114432f0f3aedfbb5757a2b2c5dfcd9b909601da. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PTES12104101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b0a8979808a7968f1a4d0d972edb4f7243a7bb15359d2447c399706085c5f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PTES10602101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad4326632d2a2885a9bfc6125eea43fe7d7db414e0116b2d48b117444d70ad5. 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/PTVI12200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47c96e85f21274a102796634f4460dd10c06b4dcca89275af7810647d910269. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/PTVI12200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36ad3eae963ef52623418b24a034f570da1d9c989a304ed70a6b5437b46dc3d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/PTVI12300282.
Tu És a Que Eu Quero (Tu Não Prendas o Cabelo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae58095e0803a04f283ed3d42e059f705dd1dde35e5a741d09db773d1d5df7. 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/PTVI12400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae58095e0803a04f283ed3d42e059f705dd1dde35e5a741d09db773d1d5df7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PTVI12400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9abf3cae4de8528718466aad5a405525e8aed2f4413ae828090164b8fd02bf. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/PTVI12400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c6ac0a6ad90be5c88bd9b935f3709cf3c1bc9520c5572fa36401d4f6775ab9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PTVI12400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e3d8a0813606cbbae6cdd360a6feb7da289b29f2fb5323a1d7c2db5c209d05. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PTVI12500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd80f7d51ab2ded49da6eeeaa87879ab5731bb6498988ac67e241cc452a2d1a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PTVI12500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03146673a3059bcc7c190387d25f44c6cefcc8decd394bb5236c6a1f983b62d8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PTVI12500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6262f066d40b9a369d99b50794a80e42ecc031cfe61ecc44ba25864bc09e2c6e. 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/PTVI12500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f75b0c020877bdd07c54247df3b0057e427ce328c164f6421f6a267f95e843. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/PTVI12500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1709bd88f71ce812ef455ac2acf406e5107e6687507093462947434accb1bc6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PTVI12500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4e3bdba2f6a89d4b827394c92b83f8a77a68a0a4735498c7ce600cd9198c26. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/PTVI12500148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8bc637b7f5faf41b706241f166cbbb4f1a272da5dad5fb4a056ac1f3bd4ba2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PTVI12500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539027aca69e489a24f1acd00ae8326c8b8af0befd49fa050ecba3cf5de1cb1d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/PTVI12500150.