A beret ( , ; ; ; ) is a soft, round, flat-crowned cap made of hand-knitted wool, crocheted cotton, wool felt, or acrylic fibre. Mass production of berets began in the 19th century specifically
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 0xea45ffca2dedc18039917899bcf8646e53bfca8719bf50be0bb546fc3702e686. 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/c5b55162-b643-4ebb-b5ea-076b512c6c4f.json and https://artists.proofprofile.net/proofs/artist/c5b55162-b643-4ebb-b5ea-076b512c6c4f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Mundo Es Suyo (Banda Sonora Original de la Película "El Mundo Es Suyo")
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 0x585db15b74271594f5c4bd2d398ee5c325f488dfb8efec9325b1f8ba93994198. 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/ES1151900489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7c9354facd41c57dbcd6f48ead160757895be6f50a7fdac3acfa81192caa11. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ES5151900434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5270dbb87da31a33d6518c396cb70698af2ac7c4ba18e616f91d7099b651baa4. 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/ES5151900594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8fa59b0b95e6f9b54b4494a504687a971b0c4a547fb63f69bfe6bf4367898d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:54:26Z), 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/ES1151900886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fb98b535ded74814398864c1694b6bcbe74e4ec3bdfb584e8e5d5311a4131f. 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/ES5152001058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bccba5fd8250a7f5d2b3d4939d09fd91e0fb155ee54ea5d824157c656b8a90f. 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/ES5151901171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bff3fab09b1dda748d99f23ead23622edbcddcd7bed80e0dbaa29d85a16dc3a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/ES1152200677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c086bec5754036b0faaf15b21b1721fcea7b92ffa5918ffe8dffebe19295a1. 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/ES5152200971.
Troncos F.C (Himno oficial Troncos F.C.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d169a92ac75cfacb5010a3e4570144d0ce29182de1b2316ac6e013ccd3b8efd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:06Z), 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/IT5592300238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5674ceb3a15f30d993edb18562dadc3452479b6e2639cb223c0963d2b8d70720. 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/ARF102000360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe28f7fed68bc72b5585d84cd4a8b768260bb501d77a67963cc9cf4bb1605f1. 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/ES5702002242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e520c9059560bce85d71f92157993c36994a76aa8ef2bc7bf023151dc9ac0ba. 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/ES5152200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f4dce33ddec179f9fe858bda545fa6002e641159872f95c0646a007ccbe658. 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/ES5702001544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f4dce33ddec179f9fe858bda545fa6002e641159872f95c0646a007ccbe658. 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/ES5702001544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb54ba8016f318e4332c36a0d90f5cae5dd0b13af94e69a31afff8e33c24f3b4. 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/ES5151801472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda08f9fd746f2bcaa1eb67b697068ddb1b677a313fbddf49665ed96f2161c98e. 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/ES5152100799.