thumb 3Cat is a Catalan language video on demand and streaming service. The service was launched by the Corporació Catalana de Mitjans Audiovisuals (CCMA) on 30 October 2023. History In December 2022
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 0xe3a0c01fa537e087e1affe6bf2f2773b720940ca97ea620715749969971e4866. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfb0583c-f025-4787-a636-c7603291446d.json and https://artists.proofprofile.net/proofs/artist/dfb0583c-f025-4787-a636-c7603291446d.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 0xd920ac7f58401979b189ceaede3bddcd83f19535f8d49151f9b78a44bd54df29. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:10Z), 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/ES5301458662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc93c934c1933a4002b01807cb171e8a37d1faf9b8bee662b21ac493448b0326. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES6091900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d71a03c58376c31dd9324f466ada274f0dbeb588ac9e71c11946985b977fde0. 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/ES6091900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2ca4784bfc63109b90fe6a20c80fc3fe7668ee62c0240bfe9de4cc1f45d5b4. 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/ES6091900122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9015367e2ee7244092e9bb3f478b6652f9b382ad75abd99fefa65acd411885f. 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/ES6091900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41ec83d080bd74db600309cf0901a3360221e4d50b53d06a0d3b7384dc69c18. 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/ES6091900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc442f63b7dbd1856971323cb3c4972b0ee6ab71133dbe713e8702d23059b66. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES5021901612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffd1053ff484f27a4dd45ece80f2bc6a333015440c1d2037b0f87b4bab26432. 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/ES5952006467.
Aquest eclipsi del cor (Total Eclipse of the heart)
Tu ets tot el que tinc (You're the first, the last, my everything)
Jo mai mai - Petar-ho - La Imèn, Berta Rabascall, Aleix Otem, Joel Cojal, Zoé Arnao, Biel Rosell Pelfort, Maria Morera Colomer, Jan Buxaderas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b141bdb57b9d25c765b3a1cb1fd03589da64a29baa75503e0d402e47d57b4c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:59:47Z), 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/ES6092400485.
Jo mai mai - Vine a la festa (Maria Morera Colomer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04733c338b003cfafeb24ffb319c5a3f8198d6b236ef6268cf8e6d83ee66fb42. 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/ES6092400509.
Jo mai mai - No vull baixar (Maria Morera Colomer)
Jo mai mai - No vull baixar - Maria Morera Colomer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9e08f3e76e4a312caa5f77e94c7a8572b1475061878d3c4aab3224073e84fa. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES6092400508.
Jo mai mai - Bailoteo - Zoé Arnao, Joel Cojal, Biel Rosell Pelfort
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aa6ca1d5dcc04d8cb7ddfdbf4d6bfbc36741f1fdf0ddad2cad799d81582c9e. 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/ES6092400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea7c159931ef06cfe6fd7a6edcbb52fd15e71391dcb489249f3b01ba6394fed. 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/ES6092400511.
Jo mai mai - Compta amb mi - Zoé Arnao, Joel Cojal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc097125dc8770af3fa3837019adcbf399f7d2e473bce8affbe4b24c568c8a08. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES6092400512.
Jo mai mai (Quina Calitja Jan Buxaderas)
Jo mai mai - Quina Calitja Jan Buxaderas, Biel Rosell Pelfort
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69360296a97b1df84f16af60cda279481f5a7c136757d064e3793840dfdee401. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES6092400513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cadd6a44d4fc7f4bb0784dae23b354a41b188aea2952010183f10013a87d15. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES6092400527.
Jo mai mai - Viure sense tu (Maria Morera Colomer)
Jo mai mai - Miquel a l'accés 14 (Aleix Otem)
Jo mai mai - Miquel a l'accés 14 - Aleix Otem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb831799471821217173381bbdefd08e7a59254585c6c397dae9f3e7dc1c6a653. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:34Z), 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/ES6092400528.
Jo mai mai - Tu ho esperes tot de mi (Joel Cojal)
Jo mai mai - Tu ho esperes tot de mi - Joel Cojal, Zoé Arnao
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8e5f7d607583a68bfe3d06953ce14373ff3d8c20737353870af680bab36b59. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ES6092400531.
Jo mai mai - Indapanden - Aleix Otem, La Imèn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4beda97c26d5d474b9fffc155fb1c9966a572f5b690d04fb152d5a0729181f04. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/ES6092400530.
Jo mai mai Fosc - Jo mai mai (Claudia Riera)
Jo mai mai Fosc - Jo mai mai - Claudia Riera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79e7557d21076012fd40d753795697f38f079ac0b258f761b58b2d9f5c4a0eb. 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/ES6092400550.
Jo mai mai - Si tanque els ulls (Berta Rabascall)
Catalunya Ràdio: Totes les nostres Sintonies 3
Jo mai mai - Fil de llum (Berta Rabascall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d13a46a42aac5026d385fc4e93883a2122f8f2dc2576064490fe341d0af078. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ES6092400714.
Jo mai mai - Que no s'acabi (Berta Rabascall, Aleix Otem, Adrià Salazar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1997caadee42f1268988379bbb89d9fe4a8d6a7000bf2bc578283d5f2e3b9a13. 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/ES6092400715.
Jo mai mai - Tant de bo (Maria Morera Colomer, Biel Rosell Pelfort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cc1b048ca9a169ad64c2e40ab77281f5ada43850255d76f0f804f5c8386d16. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/ES6092400718.
Jo mai mai - La força de la Mai (Berta Rabascalll, Aleix Otem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb20ac491586b128334d2b0425fee3e34765e1c5f71b156e678ad1128c336992. 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/ES6092400719.
Jo mai mai - El meu cos (Júlia Padonou, Biel Rosell Pellfort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f548d89c24a1845a4be45646e44bb01bd200bbb2fc0f584656de4205551561. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/ES6092400712.
Jo mai mai - Quan tot s'enlaira (Maria Morera Colomer)
Jo mai mai - Bevent Passat (Berta Rabascall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11bdc87daef6c2a8f1a3136c61fa2e1f0a53a1ba5f2f61f888377298132221c. 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/ES6092400711.
Jo mai mai - Gossejar (La Imèn, Maria Morera Colomer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974710f8979e5a9db4ced6ba79742e18d5828f8c870a7ed2c4b2361905864128. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES6092400716.
Jo mai mai - Mai més (Júlia Westermeyer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d63db5894defdc431629da48a7d1fc5e7c8b699de249490206187eccb4439. 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/ES6092400717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58109f4972984c3293b827b81e3c1740b60ef6cd874bc7dd34da5e680c1e3c33. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES6092400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d13a46a42aac5026d385fc4e93883a2122f8f2dc2576064490fe341d0af078. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ES6092400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1997caadee42f1268988379bbb89d9fe4a8d6a7000bf2bc578283d5f2e3b9a13. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES6092400715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974710f8979e5a9db4ced6ba79742e18d5828f8c870a7ed2c4b2361905864128. 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/ES6092400716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d63db5894defdc431629da48a7d1fc5e7c8b699de249490206187eccb4439. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES6092400717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cc1b048ca9a169ad64c2e40ab77281f5ada43850255d76f0f804f5c8386d16. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/ES6092400718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb20ac491586b128334d2b0425fee3e34765e1c5f71b156e678ad1128c336992. 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/ES6092400719.