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 0x483384e2ab31fa35f184161205722e55146ab3d8432204e779183a29effe73e8. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/462a8fa0-f1c2-48a1-bd83-240eb4521fd7.json and https://artists.proofprofile.net/proofs/artist/462a8fa0-f1c2-48a1-bd83-240eb4521fd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mackey: Redline Tango / Mower: Flute Concerto / Pann: Slalom
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 0xb9afee41741a713bd1d395ebb036d417454e49886171a035e27c8aae50402866. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI190600801.
Concerto for Flute and Wind Orchestra: I. Bright
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d509206a5002388f947c0ac889508fc109e87b6a696dc43f4a6e2c2683659e3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKI190600803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612cc5a572fd3b388931dee598cf6c64be38d897daee9f2ea971fe64303f9b3b. 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/HKI190600807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d65c509389648f98675d23a1b9ff62532a4a7c2f6b2e5c06c0210c94ed41d11. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI190600806.
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
Ticheli, F.: Wild Nights! / Etezady, R.: Anahita / Mackey, J.: Soprano Saxophone Concerto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63afdb05048a4b2122b75a74e7eebdd45aa9677f72531f9d13ceee19f9bbc30. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/HKI190868110.
Glass: Concerto Fantasy for 2 Timpanists and Orchestra - Fairouz: Symphony No. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f887e5723f08ed3edacdf7af76abb446570a733f5b91fe9c60ec611675a6c7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:52:47Z), 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/USB8U2202911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b4bebd177ba85db1d8f6b10bb4334d3719e1166a0c35f4d183671350d13113. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USB8U2202912.