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 0xba9fe37167c3f08ab128deb2ab84bc5c801d5eee39a57130af28e7d482885273. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09417c9e-3aea-4aa9-a5d8-ee7a4909a909.json and https://artists.proofprofile.net/proofs/artist/09417c9e-3aea-4aa9-a5d8-ee7a4909a909.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Entirety for Guitar, Electronics and Orchestra (Erland Dahlen Remix)
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 0x7c3c3e152aa9a53b5c3c9b9dbb0abdc80cf0c4b24558a61e0f6050e1dfe1c8d0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NOKGF2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc83a4893d6913b64cf85d24bef2e329878c228868c7fd876a73792aa703c53d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NOKGF2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2337e73105411cc743eb22d442fec54f89cd0363adfd8576785d30346e0afb. 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/NOKGF2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c6404eb6b6f128cf40425b98aecad893dd61b66f0883e8e629699457fd050f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOKGF2401040.
Endgame (Shostakovich String Quartet No 8, Mvt. 4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5adf9720d0b8fee0eceefe709fbbff05584e873d4264600ad3fe6f8a0999420. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NOKGF2401050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf054d107f4b8401fc6d672506b32814f7dfce5ecec9e1bbbcf102ef4f3e246f8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOKGF2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a3e5d2a6bd79ee8887e3d3b75f9c6fbf3192136f75a1afedbd2305b64fec9. 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/NOKGF2401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125fc50a76c44ce398cb7fbb12cbc8e50ff7390c642f47ede0cc497d4ef50686. 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/NOKGF2401080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe916ed6f1aa5fec2d81e8c2693697720f7ee57215d071a05e8f2f87175686470. 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/NOKGF2401100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe88334fa243325041abd9a5ede10b4a51ba59c0065d836e5d510cc6c1cf2b23. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NOKGF2401150.
The Sound Of The Sea (Remix by Jacaszek)
The Sound Of The Sea - Remix by Jacaszek
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fdc7a78ff979319f787292a75c72e03747d9651f6b4b53bd64f4643e1f0dda. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/NOFYD2308425.