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 0x46991a3c3adf17a268ecf32bc5af37fb00867ef3e522692fda3ac5de7674427a. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cbc2bc9-4d81-4831-969d-6f6f17f426e9.json and https://artists.proofprofile.net/proofs/artist/6cbc2bc9-4d81-4831-969d-6f6f17f426e9.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 0xdc45f05743e3effb1617fc930cebf29ff879e464a0e67821142a0031504d32f7. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/DEXO52490044.
I'm Leaving It All up to You - (Re-Recorded)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e553a4c527aea09afaf4e410f8af8edc58b9fb3230b38ded92e8c4728eafcd0. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEXO52490064.
I'm Leaving It Up to You - (Re-Recorded - Alternate Take)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3a9d49faa010c6ac16c54859c2150ab690a75587a3fe8c15f4c39e346add41. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEXO52490066.
I'm Leaving It All up to You (Re-Recorded)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a5a3fe345230ecf7adbe82135ba26a47391b0ee6b328f3473fcc26bb21e1a5. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEXO22208930.
I'm Leaving It up to You (Alternate Take)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8b338548c6d09f8c79a29a75343fe530579b89dcdfc5a6a76098be6a82e6ac. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEXO22208933.
I'm Leaving It up to You / Stop and Think It Over
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e2a44d016a2e181a40ffd77d66582744640fead6ab05255658ed2dab21085d. 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/USA561050225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e2a44d016a2e181a40ffd77d66582744640fead6ab05255658ed2dab21085d. 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/USA561050225.
Music To Park By "20 Great Romantic Hits"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71fde1ad3338f4c420e9f87286b17cebc53541fba9b73d251dcbfc8b871ae11. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USACU0520001.