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 0xb225005c339c6e422248f9d1bcda40645580cbe09947a9ea90da42ebd7d6dccc. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/981e2e5c-be4c-41ac-8027-39f4e97f70f5.json and https://artists.proofprofile.net/proofs/artist/981e2e5c-be4c-41ac-8027-39f4e97f70f5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cce37387a09ece3d525b14cd32e657223a80bdb00b8c7667b47db0a3170ce7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH1492445918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc473ef0c2fa42714a2096d2fd16332acf81e5da812f319a3fe683aa3a01e6d42. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES29G2306804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5db91c9a0f1be9577e5cc15817d1120cce74c3d1127db34de624aa60877513. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES29G2306805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb42d7dabe5378e2c79a852574ea581faeab1fe80126b4c784eb5651de47f355. 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/ES29G2306809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8a04137047ec6bb16a568146457828469f85294b2c111dbc7aee20c79ad855. 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/ES29G2306810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2d051e2d3118843419d2add79c17188b15f5e574b8c061be107643e603bca4. 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/ES29G2306815.
The Hibernian Muse. Music for Ireland by Purcell and Cousser
Great Parent, Hail!, Z 327: II. Great Parent, Hail!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352bbd3447cefa412dde0695de7ae8368697cb4416e83b331f3296b42ac945c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBASH2268502.
The Fairy Queen, Z. 629: A Birds Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9b2f532b9ea1e1bc6b700a7dd22c1a16e37a4607d6107c8a801adeb98be4d. 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/DEFG22261902.
Suite in E Minor, RCT 2: V. Le Rappel des Oiseaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc25cca5a15fd1f760fca6eb8b7ac1cba2757bb4168e6e8fd8771077e1304aa7. 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/DEFG22261915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1343a6ffe1ffd72bd2a613d5cbccc76fb551e0b21cb76afbfe64ebf0ed86ac1d. 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/DEFG22261917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbc20b19ce5be0d4e9326ece09f4a19070237c6be9820d5f587f5d087cdd11b. 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/DEFG22261924.