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 0x431c0c224349c8b7a9d1beaf71a30e0d862a29b7a348598e9398c1971cff30e7. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/396dd8d6-e228-4e73-aabb-f58dd0d41c1b.json and https://artists.proofprofile.net/proofs/artist/396dd8d6-e228-4e73-aabb-f58dd0d41c1b.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 0x80a93c6e4285513b8ec0049aa5fd6b9d5fadf9d8619dfa40c6b1c548336150f1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:53:11Z), 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/QZPLS2269835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd5fbb6213fc493107dbaa4883c82045334064f790089bd3019c4fbc6b3b45a. 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/QZZ772433185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4060ae87d472f4ca382575b8f49433daf4759c5f297f19da5c2c6ea7e0cc593c. 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/QZDA82531668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b312cf300939730a7a71b70d641cc8700d019a660a13f578403e4d69dd96c42. 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/QZHN62517349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b312cf300939730a7a71b70d641cc8700d019a660a13f578403e4d69dd96c42. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN62517349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfafb6076b420bedf67ebb722c6f40358ce88d005f64d47e27a3cec8a0770055. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMB622515903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef428032328f89b533d88cee4678a95540a3751b646c47236b6d055c51f8a2e2. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QMB622515904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9b98e704722f9174931d9f7b2910d6f2326a5314333b7e690f7621bd97d1a6. 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/QMB622515905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4060ae87d472f4ca382575b8f49433daf4759c5f297f19da5c2c6ea7e0cc593c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:35:44Z), 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/QZDA82531668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddaeb08df5d3cf8d9d6eab6738197e9c80e7ec0790a8a02990fbda835bfb7bf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMB622515907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58e904e55da0d7201c8061e39f14860f2906b0fd7153994d1750c35fc633164. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:42Z), 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/QMB622515908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537fb93d1b340d1336c6e1e22f71e1d76d1b46afdf682e4a54f3dffb2279268e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:29:53Z), 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/QMB622515909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908e2a60a9c90e7d7f11169edf25f7cd7bb3029fbafa4e1b84015f49ac777213. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QMB622515910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8032fa78b72f6632638cf195b85a56675ebbe61987536a23ec3ee70515c789. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAY2331787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0def16ee89cc00e3920dd17295a3ba0be75f275a69509bf9e3ba0284047dd6bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32431264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5286614d367548491fb4507aa29b5b97cab53c457ea8fbedcc704eede46059. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMEQ2069843.
On Fait du Rock - Sujigashira & Le Diouck remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152f02b9f8545b1ec310942200eb0797280b80d2967bd735da85333c5b62f97f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FREJP2450106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a559170c3be7ea56c6668b0925e866e72402000167375873f9684f9e9414d2b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEOE82300042.
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 0x72310f3a656c63c28943dfa87f0fae86152cb982173a0f8c4f4bda6857346e20. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZRP42544480.