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 0x98e37aa9cbc73ff6397e251445ea49ccf9c6a34213d24533cd5334067cfacad2. 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/7c68d157-3521-47d0-9c3d-ae5810f71644.json and https://artists.proofprofile.net/proofs/artist/7c68d157-3521-47d0-9c3d-ae5810f71644.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 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 0xc378eb954e71cc2000874a21f0dfffb48b53c33fbd9a43d45a78c776467d152c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWT2341956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc1bb812adcceefa3c6757014265651fcd4cbc7f2472ba87998a10a4643c5fd. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNWT2392662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52809f21363db8f4fbd8d8823c6806ceb077d5bdbd7758f8757bf99fca9fed0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNWV2344136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb137f2ad3f6243313f1e56b7634ccae02b8e89534142eb247fa1f950c1bdf2d1. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZWFM2326294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac389758f69ada3aa439976200e65de8112ae0b2209b10c83a46a041533f7af. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZFYZ2486974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0748c0308a7c3d581a9aa5e86c0f5fb828f8f4d40938b8ea0e1f18dc8081f553. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZK6K2453728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0792d931ced4d66f60a0a1eff91daeadcaf7cf75ec652d75bf3a3b68c67c675b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZK6K2436086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b4728174a5c277a7d35b7f987c83875aedeafe33193fc01cbdfd2c61a76b31. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZK6G2412568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6d2b48b5f63bc8157cb954065e417239d9c62bc39b1337addcf3a70e91177. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZNWZ2431895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4afd34c7b201dfe10fbd5d9ffc53855358cc4cd5b405dd4c0df58affe82d9a6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTAX2467710.
Rosa Que Linda Eres (Alibi) [Samba Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7e3ac04cd7748ea62c052beaa57813e74cd2c77ed6dd5dfc63a2e2acd39bb8. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZZ792416544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4e2821723766aaf5e977c0654089c3cea754d3d56dac4b5a21a18ca8a90ca9. 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/QZMEQ2506875.