Zarzo is a Spanish surname. Notable people with the surname include: Manuel Zarzo (1932–2025), Spanish film actor Vicente Zarzo Pitarch (1938–2021), Spanish horn player Category:Spanish-language s
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 0xa7aeb9480ebca179bbf0979e41901ae0407aa645e012b488a115dfd9f918b8d6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3428b72-3029-41c1-8c80-7325c6a83878.json and https://artists.proofprofile.net/proofs/artist/d3428b72-3029-41c1-8c80-7325c6a83878.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 0x799c51c9e1b23f80b39b4705ec792b8426516916cfd2fef2c96b684b493a0fbe. 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/QZZ7U2458924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81799f68792aa544042ea18b962b0885f5a7a229acbf709044c9eac3174b1a9b. 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/QZZ7U2458925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9ae1c49ddbc6672268c83dd65e1ea99d897ac44108caa916991b5ccb0cf439. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7U2487313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db77be79962b58efb44a60d2f4b21b262bc4298547933b5f27f97a4346e3e4a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ7U2467896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a6cfb29ceb002cd2efcf61bf60e2a6951404ade02f7206db140cd88e097340. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:32:47Z), 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/QT3EZ2462150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aada97c655a647f33f4eea42e808c65a4343a4b7541826222dd88065603f77. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZDA42560972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c31107268ef4a78f826f775e95d14351946ecfdc1ed551a1ad2898fa254441d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA42545591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db77be79962b58efb44a60d2f4b21b262bc4298547933b5f27f97a4346e3e4a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7U2467896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a6cfb29ceb002cd2efcf61bf60e2a6951404ade02f7206db140cd88e097340. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QT3EZ2462150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aada97c655a647f33f4eea42e808c65a4343a4b7541826222dd88065603f77. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA42560972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c31107268ef4a78f826f775e95d14351946ecfdc1ed551a1ad2898fa254441d. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZDA42545591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9ae1c49ddbc6672268c83dd65e1ea99d897ac44108caa916991b5ccb0cf439. 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/QZZ7U2487313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef224027839503913f1b02264f64c9d2e47c6e9d9388ad2f9d047bad57a68f. 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/QZK6Q2510209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9698158a5a477d380c8de64615b11da260b1f9795e2c8f08ec7cebf0ecee88. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWS2519986.