Los Muñequitos de Matanzas is a Cuban rumba ensemble from the city of Matanzas.[ Allmusic] The group was established in 1952 as Conjunto Guaguancó Matancero and released their first LP in 1956 through
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 0x3d3dad60fc808a9046b4e2d5dc5747c7b0fe843880e5da51fa4b0243dd131948. 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/04e128e6-4e9c-4e42-a791-3250bdfbc614.json and https://artists.proofprofile.net/proofs/artist/04e128e6-4e9c-4e42-a791-3250bdfbc614.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guaguancó Matancero: Candela! Cuban Classics, Vol. IV
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 0x343ba63927731728c97b7496e6345b93e5dcdc5969332bc817bd694259faa074. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/US78T0504468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273ab52af754ca236e62a8a5c7594ae3f21ca0a08679b48b586c6655c83a1b3c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US78T0504469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e251b07278170308901c57d8464176636959dad7237cbce930fc60d9e9d4ec. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:31:26Z), 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/US78T0504471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a1555165bc2e51587451dc15df559b2f5509a876467036483bd69e29e31f1e. 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/US78T0504474.
Los Muñequitos de Matanzas (Remasterizado)
El Guaguancó de Matanzas (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96af7cbbbc6bcccb4386f835de9b0f42227d0eeac4f26a139d6e95dc5d9f2ded. 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/ES7630601674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450c679f1283451cfbf082ad8734819b81b5f3ca8ec7a5e68e42376b0b071835. 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/CUA021307907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c2facbd8381cff1720f5c8254838a8504db6f50b6a59db35cb0416afde8763. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:56:24Z), 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/CUA021307908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0269606286404e4bfe908d95deca12cb8ea1270a0386f3c6ad076e10a4bb7e10. 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/CUA021307911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144bd3ca84c9096a7b1ba3d033611f511ccc87d7bf719802b5fba0e18366943f. 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/CUA021307914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1280cc420015ca231ade324b8650e2ad8adc4ddc4caee8be26fcf39f710143f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CUA021307916.
Guaguancó Matancero - Candela! Cuban Classics Vol. IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671fdbeaebf3f51aa1d195b74ce7039cb1f248ade0070c6b739b99e1ffebc2cc. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ES6601402759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef23bd4aa8c5bc230700c73089e66cacb74f784538faac38457a6908be26c98. 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/ES6601402761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf457ddd5a76f3ae019f008c47ffd5b40faeb0541430eee227cfb4e97a0790d8. 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/CUA021812872.
Los Muñequitos de Matanzas: 70 años con el poder de la rumba.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fb9ff38520810719dac4e326be8da3452932b8d058b69ca7e90e90ad0aba26. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBBFT9500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d4ffa361063121c87744cef1b5b01edf6c95b78502e51ede25385bce03dedb. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USHM80679966.
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 0xdc7f91cf81483c9b30a692ba295c8a0123813750b867a6d022e972dab4294854. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES6601403890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6b7d98c7c18568b5e03485eb419d5b2c33f4256838a18a3787cc2d250bb45c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ES6601403893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3c44cd838e6b39d8f991e0799308fff2a305fa11b003a03f3983d0c6900b94. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CUA0B2200028.
La rumba soy yo / El All Stars de la Rumba Cubana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd81173991ee34640ad4060afbfd835ed56fe4b20088eb58deb15a61b9ce14a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ES6100670746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8decc4645f5d440403e9b44072d66e8d9fb71d7af3d28251a7509d5c41e1a7e6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES6100670753.