Celina González Zamora (16 March 1929 – 4 February 2015) was a Cuban singer-songwriter, who specialized in "música campesina", traditional music of the Cuban countryside. She is best known for co-auth
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 0xed68fa454a6652c9e1a2a97a3407886593112b5bf115c44b6c48b0f3231277f5. 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/6a9fae6f-6dc7-4e0e-ad17-79cd9ed61d08.json and https://artists.proofprofile.net/proofs/artist/6a9fae6f-6dc7-4e0e-ad17-79cd9ed61d08.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 0x36241ed1a8e1afa0b380605ce37cfeb6db215e0873ffcad93cfb14df113be34b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBMEZ0935376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e3f6620c6e96845ec3eba1158985e31303e6b29745a6552d92b2b704597f01. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA011306324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f79423f3f34dcb318a1b088753bb4cdc899b4e0e2cd04b4a40b8fd0fc512e59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA011306333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3417bf6aafdbe5a2837d2cec76e80559ee384a477666151f656db32cb3a7f08c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USWJV1000333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49b807a1281c09fa4772b9a3ef87c88316ac822fd2d2bd9ef0b709f8ca047cb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBFT9500074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce113cc8b950373e5cdbcc845d28e27c5262b5f0e1412a658a514c2c1349ada5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5021609395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee79a4ebe9d10e1b22b6d2ebba145fb16e72eb86cb392dec5f9e6fa5ec9fa325. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5021601024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4d48cb8c67d9838c5444c074ee2de6ff347fe841379e438b5a9760dc52a926. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA371023318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2684ca20e8c9071a3168cfa70d2ef8b4a23e56b238b60fb964e7be88be13e56. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MXF171100879.
Cuba (feat. Silvio Rodríguez, Celina González)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa063bd95411515280dccb0ec009082cd718e6f29222e7dd4402f22032e06132d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ESA031422213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43d768962b67018925a7028660b41b24c10844e2c505793226be0c56b722898. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA031422214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1167e63bd827f457865063e0dc3ea51afa6e7e85bdb827fc1459b3c5d6cc74ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ESA031422215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd956c56993c2cdbac81cd0337a613744efe5cb18db7ee3b1ec249e62e0496f08. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA031422216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43ccf1b14133e4e98e372a2a223188ad20a61ab7154a1b2af8b50cb76e383cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ESA031422217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8360a5f61d9304f33e7ec27ac025250fee0070a06289cf5d01bee03e2dc704f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ESA031422218.