Nancys Rubias (Blonde Nancys) is a Spanish rock band created in 2004 in Madrid. The group has released 5 albums. Members Current members Marta Vaquerizo "Nancy O" - Triangle Miguel "Nancy Reagan"
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 0x617e7e4510336ca2915991b8505f45a84766fc8fc97a0f74ed87499c6efe3e72. 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/233d0a53-c98f-477f-9606-abb211bafad0.json and https://artists.proofprofile.net/proofs/artist/233d0a53-c98f-477f-9606-abb211bafad0.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 0xfc6d3501fbe22684e18576547395af75cc873b76146008c75d403a6b86e42e79. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ES5010500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49fed4f60cd1020378a5dbe23a6c2ac6fd59f132b53231cf4654cd0f9688a67. 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/ES5010500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0020adef93a3a021f6b45e03a6975b8324329f276f910a414481f7949f13aca4. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ES5010500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409705e80c9929096b0e84b4e0754cdbb457cbf714738af8da6d9fe0d2732089. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ES5010700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7041a4c48a910fdddb7175ca704626045e8c85004644306800f7d071b7a658. 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/ES5150801341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0898b97136218423c15180f683ce21bfd2da3d1c6aef7d04ad8b4744de7ddc85. 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/ES5151102209.
El mejor regalo eres tú (All I want for christmas is you)
El mejor regalo eres tú - All I Want for Christmas Is You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b49ae344b72b042321747e9b6788fbe441a91e9a0e7c6196b22d0dd42734176. 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/ES5151201865.
Bailando conmigo mismo - Dancing with Myself
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9992c3e0c50238894d01cd27c05de58be9b0105f10a3823b88bb8c4674739a5. 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/ES5151201866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2abc28559e64734552541204a71da3bc32d3218a1c0fd4cd0dd6b5c00919b0c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ES5151201867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663fbec6b5cd00194184d1dc9e4a20f052ec74c9f6a6d3f397abac2bfab373e9. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/ES5010700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656ea6c64c934992f5cf519702b6bbc227576c9d717d25f509de7644a174b84d. 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/ES5151400998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda415dbcc07dd776f76d76aca53ff7695f92432289d0e880b312e63d26346747. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ES5151401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fec0313697390c16ebb4b810e282585e7ee55f46caaf924755b15d8acade00. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ES5151700801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40a54f8509855566f971f209dd6908bafffc9b79ac0536b10a3dfea20d3c777. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ES5151700802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a227c0ad470cb28e3e1c951090326fb5afda4ac28eb1be6337c3faeed2f775. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES5151700803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed75f401650d29072c9cfb1fe9e6ff43aa8fdf762d9b3966f4e5048afc448e5. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ES5151700807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8dc90ee604f3ac6ea13c91a5c2fb298b057de831c546aef1c57bc2ba542048. 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/ES5152300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6153d9f8bfcc0880646916d2d932e195ea9ffe93236ea4387b942ffde16752. 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/ES5152300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0329a731c8c5b1ba8efc768279207734ce52e1555d8f031a2c71e1bbb83f2c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES5152300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7798c0e23f370e3162fe0ec7edab5cd4d60c964b8d61b625626538e770188c4. 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/ES5152300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b07f82d2f70989fe572048be25cb7084e2c3f11f1c887a0b3c799bdc3a4f018. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/ES5152300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558b04e382e7f09741bf07df381827df01abc3fe574955a9f34ee6c7396c5ad9. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/ES5152300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a08c2ef323e92b7e59f9f5ad3e6b8eb34095aa48eef4a9f1e2050a17d37f44d. 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/ES5151300892.
Viaje Satélite Alrededor de Carlos Berlanga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4ff46ad5bd2977b5d6b84594742def6cde15fdff2d281b898923c76ee526d2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ES5151000744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad310fd770fca2a99f6f075fd7591c55b195b58f31f9a22aff22983abbb1b14. 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/ES5151900174.