Sienna () is an earth pigment containing iron oxide and manganese oxide. In its natural state, it is yellowish brown, and it is called raw sienna. When heated, it becomes a reddish brown, and it is ca
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 0xf8e26ac98cbae43008f2df0b0017f5e5477a852a2dae5a7b8089cb261fb7419b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1d56c2d-db85-4741-8814-d200cc4b567a.json and https://artists.proofprofile.net/proofs/artist/e1d56c2d-db85-4741-8814-d200cc4b567a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Clímax Final (feat. Gabriel de la Rosa de Shinova)
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 0xec79082f57d36bf21a289b8b779c14bfdded6493877cc83e3df90e95c77c6adb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6P41732922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9650b89979eba597414c97955d0fb2812c3a95edbadf6723e82b61a4470c117a. 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/QM6P41735035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2710ac1652325e6983bd276785651c197288a99919d1ca37c3cb6304990dfa. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM6P41735057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d34df4850d07376566fa58d818fa3a6c42301461e3ec02187f78fd0c04925d7. 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/ES09S1900582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20208e2b4c4ff752590342bc0eae774c9a3f218e6561ddb4b392252861b3bef. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/ES09S1900584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78494f4fa9105c3aab7c6827bf72197b6d683b741fd7980ffa052cabd510139d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES09S1900586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078cc86782062ce4c8ddf28512af9716dfca1b727baaacd42c21f162eb57419a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES09S1900587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5a76009e547674fed0f0a5316d3983b94e4e46f54202a5646dc84f56658c4b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES09S1900589.
Tiempos de Cuarentena (Canciones de Cerca Hechas en Casa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c5045bbefd4dae4c79f8b814ab985f6e45a7bac4edd6b0d388bc2d0dc692c1. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ES71G2130978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb636cea432f06c05c621b131a71f7b035aba58efc5ffe6e52a1d0d2db57bace. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ES71G2144216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b24f111681d347e31ef14f5a105023be5a1cac73f3dbba86b19c50ed7b3bc4c. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ES71G2400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b0b01a7d2e48ae7268195b4399752c7e0d62086417013ba2a1c7aaef326aa3. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/ES71G2407099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab8a9c75e568c23578322c75bceb06c35d99cd2dc3687bb602cceff64a9ca99. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ES71G2409918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039e9f7221fbaed15c438381f671b30838af48e6a3b048b52a36b22e37139464. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:40:53Z), 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/ES71G2404179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b0b01a7d2e48ae7268195b4399752c7e0d62086417013ba2a1c7aaef326aa3. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:35:33Z), 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/ES71G2407099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b24f111681d347e31ef14f5a105023be5a1cac73f3dbba86b19c50ed7b3bc4c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ES71G2400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4db59880e28be2dd42e940cf48457e4eb6fd0cd31740acfe50d93157e036bc. 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/ES71G2409917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad1c5f33de3f0a8c0247c9ffef369d942c83b965884773a2ec294562520d5ab. 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/ES71G2409919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397379aa401f85f303a7692cfbc219acd32f7f0446defab28acc63cf1493179c. 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/ES6062524207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397379aa401f85f303a7692cfbc219acd32f7f0446defab28acc63cf1493179c. 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/ES6062524207.