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 0xa2844fdfcf76cdb2281e1db6e5d27b661376d5d867f318216f0aff9e41878602. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/781d5d05-b9ab-4536-9ba4-f6ce414e6a09.json and https://artists.proofprofile.net/proofs/artist/781d5d05-b9ab-4536-9ba4-f6ce414e6a09.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 0xadf4947363be7e2dd0a8977c73523b6ea06fc0109f79a33eb257ba1c64e62a4a. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZK6M2366230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc4261e5ab81fdcbc8ecbee42ecb31feb702b06c2d6461d6dda1a7d9ed91f69. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWR2342741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6edce75cb99886bca45b4ab261c513df195dc53ae9fcbe30bc96f3043415c6. 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/QZPLR2357291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6cda3d46e8c35db56d7447519fd9975b63eecefc186b884cb85ae91b1f7a27. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:36:13Z), 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/QZTBC2305049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ea32bec83f4cebb8ab70dd2943bb0416d4cdf40cf29c94abcedc122aff2b6b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHNA2485441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8a58f8f2539f8aae9832e976ba4955e096edf0ec47d8005f3dbadcffb5403d. 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/QZHNA2485442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484413c8277a2829d9216d62ac05907e824bd3207ec4e85ddc3dd33eea282329. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZHNA2485444.
piel sin piel (Sanxez Remix Deep House Version)