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 0xb42f21a6dba8b846b40003ad11fb099cb2de126043a5fafd56bf7f9c7cf11f13. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76b3add0-b813-4395-a722-19731bb9de54.json and https://artists.proofprofile.net/proofs/artist/76b3add0-b813-4395-a722-19731bb9de54.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 0xe58129064585c28df930e8ec2d40236fd53f560ad7d0c674c657c7e0d2d1f235. 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/USCO90848011.
Jim O'Keefe's / The Clog / The Star Above the Garter / The Hare in the Corn [Slides]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7be28413d4e4fa6ef4810fe4b01b3c515e9e5b029c1a248cb5913aecccc900. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCO90848006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721a606a8bfa46771566cf49f0ec67c22ef387d6601eaf048b91019599ce45f1. 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/USCO90848008.
Fiddle Extravanganza: Never Was Piping So Gay / The Chandelier / Paddy Fahey's #25 / Paddy Fahey's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9007361b353cfae0f6f0e0870b12b1daf1cabdfe0984cb0a0aca45fe05f01d8c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USCO90848014.
The House in the Glen / The Bohola Jig / Josie McDermott's / Free and Easy [Jigs / Reel]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8518d6c10f2fb4c019efd1d64465860019179e35f53cfe150fd8d640d181bfe. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USCO90848001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545c203ca8073f28aa7bf8ec70405a5c96aa6d56d3d5fab06ee11f5b54353c0f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USCO90848004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2ef08c74bca520536d3236473c2b65113357beae83e72b134720cc04061aea. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USCO90848009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31f2ee4b3db72da5064a2848b86be4340e2b8b76e1dcd3503d780bc0358b5e3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCO90848012.