7 Notas 7 Colores is a Spanish hip-hop group of the 90's hailing from Barcelona. Biography 7 Notas 7 Colores emerged in Barcelona in 1993, when there were few rap groups in Spain. Its members were fr
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 0x25e855117d301bc78c6e1337dffc729b0618c001812d1e3148980e3d6988d7b7. 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/aba57ac5-70be-431c-8849-f3e9bd2bdab8.json and https://artists.proofprofile.net/proofs/artist/aba57ac5-70be-431c-8849-f3e9bd2bdab8.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 0x45ce0479510b09677aed787a1b35fb624d29ed2f63e2804640595ab52ea6a8b1. 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/ES6081740701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0301db5dc09975f645770a8301fbe9226a49350ee11578468c6022c753f96a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6081740702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9ab4e0a32448832c198cbdea138a97ebb47958ceb4b1c4ae23399525af40d. 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/ES6081740703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05969e1f928a28483f91d0aa2bc54b8058104aa87f68f0989050614762efb13e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6081740704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017c3f7ee8bbbcd53a67e07c5ea528196d476ca36d069b5e9ee8003aef8ac412. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6081740705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e0ddeb66a6d27f6e5bc348c0aec2c88af6361dbb41fa612ac9c8daec2c89a1. 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/ES6081740706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13781b729508bdb51acc99deb720657814c615243c24f25117e717a88102594d. 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/ES6081740707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704206945fae5d5b24c4f6c78c471ae8de10ebeb7abd3f0550173705650a6ed4. 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/ES6081740710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d7cfef39ca77b9035dd577a35cd476da177e6260a503dc9da5d77a6da01b19. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES6081740711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a805990a77092afb80f1710e2be4eb4fa9bfd6f509b42e9331edda6a41586c7. 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/ES6081740712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ece61f9ff73b5bef338883653b53260d502ed5950720717d0d78b337737949b. 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/QZHZ62118768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88860789f01529a97793a4b78000a1fa3c145f1010ead32bc1d7cf964497eb9d. 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/QZHZ62118758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7863be9e963959aad8e7049abccda37250ca9a30d2244ef9b3cb52dad7d568bd. 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/QZHZ62118763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcced5acce876b3518491b2b83661b9ec0fb714606a5e33dd56cd720c6bfbbce5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ62118764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a63210429e9421c673de96bb5e2875545b762a40565a5da701802ee148c00. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ62118766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de6c46745de6778ca94bb7a9afc4085a1e035d44f596e94051a7550b3bd20cc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHZ62118767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2136a10d103236bd8bfabf0ca333bc9dd5ede4210c7ece07ee0ac928946a030f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6080041101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae686399f9b937cbfb020c8136d902349abae5af594037b82a634b86274ae3f. 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/ES6080041102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab04a4db85797145e6947e7d327040303a60d9c15c55d4d632bd9128ab83a629. 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/ES6080041103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9c31d6d509fb3edb3a0e6bd2b8d1e381579214efacc73a0206ef69b03a1cd4. 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/ES6080041104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820581bec1b120b83ae136d587cf99c9c4ccc20491a5b7d4bca26c2c586e9e17. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6080041105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897bbbad54d80b6d042b719889ce71dadac4bf7c365570417750188f43aac0c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6080041108.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd950ef001513e3a3d3315cfb0869b1c1b47a24586512d015ecdffc765e5063ff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESAAI0121002.
Los Planes Y Archivos Del Doctor Yo, Vol. I
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