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 0x2c54f38d66fcf602bb27e6b659d42c438490c835377dcd34b68f7155a6991726. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d77a3332-d053-48b0-aaae-0db4787ecaa5.json and https://artists.proofprofile.net/proofs/artist/d77a3332-d053-48b0-aaae-0db4787ecaa5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orange Album (Lofi Music for Stream and Chill)
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 0xc17271056d19fcf43d320907d46c9009cc53107322f274f593ffde74f68f53b1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHN62054854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219763d38c944afac07d7364ec56ae43db1f8e08a800c6636f19e192b4c14222. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZHN62054857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636507d12edb35234f12d3d01a6908c9e914815d458213453f35dc5b1f66ecde. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZHN62054862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aef538ad5a1bbf133726a48e29c7560bf36083475b90780bfaa9fbb03057318. 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/QZHN62054884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f79ef44c2a79fbdce78fa860af6ff4fbea70d8042837bb9aaca8f515f50cfce. 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/QZNWZ2005169.
Blue Album (Lofi Music for Stream and Chill)
Gray Album (Lofi Music for Stream and Chill)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef4378c44749cc7f8c16cbf52ee8bd8e71a38a0ae89cc1356198ace8f274eb2. 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/QZMEP2368953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2366b975b17bd58a0e0a18fc0e429255372148893634181517bce7391445ade. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZMEP2368957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666f1405e1ba0ab954cc937ffd476385a7c6b4f7f87156bf81648bdeb17652d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZMEP2368958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dcb2f34efb2402f6d6a62149ba28712a61bd4e0fccda32896c3923118434eb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEP2368961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5258db8fc8b57fc7b066515b24d0e3a34b3cdd6e1aa3335afaef93dda76020d4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTB52446023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d53cfc7e89acb32eff06f01f462877b6d8318a31543b8b2ffeff215e7ca593. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB52446031.