thumb|right|Hubert Parry in The Musical Quarterly, c. 1916 Sir Charles Hubert Hastings Parry, 1st Baronet (27 February 1848 – 7 October 1918), was an English composer, teacher and historian of music.
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 0x0583cdd51db3cff1aa1de88661dabd7a6344e6bf32756a7f5d459d7e3c8492e5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b406f0e3-84f3-4a6d-a22b-47884284da32.json and https://artists.proofprofile.net/proofs/artist/b406f0e3-84f3-4a6d-a22b-47884284da32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Crossing the Bar "Sunset and Evening Star"
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 0x78e31c4e1b7a9e8c070c713e17a17aa695740aa125934f0dc13503cc7ad4deb1. 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/GBAJY0339805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6869c9319709a2c7dfd19c43da5759cf0f9951ef6d1609ca8af5291f75f35. 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/GBAJY0339808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf5ed96b50d62c94102f11866c9c8f5cfb467824fba028683e65ef00eaa4d93. 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/GBAJY0548309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838229a3f037133c1ae70d5cd187832386c0f1386059c2996b3809fbe8944c4a. 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/GBAJY0548310.
Fanfare Trumpeters Of The Royal Air Force
The Choir of His Majesty's Chapel Royal, St James's Palace
Choristers from Chapel Choir of Methodist College Belfast
The King’s Scholars of Westminster School
The Official Album of The Coronation: The Complete Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462ef589a2e1df022f198128dfbafcafd0384e6f9be6ac91f1e0cbc2653610c1. 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/GBUM72303854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc582a9a443ea0a6c72e6972fd85387beaf9520492005dacf896333e8b935853f. 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/DEA809412702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28d059711a62bcefe88541c3a97316eff4f61f62bcea3a6f141f58240508813. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBC7N1045811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069e8118a82e7592ac4f84ef182ffb5ca6eef36bc03e581c7a89211384cd226c. 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/GBF079642910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915e4b78bca44a3e4bc5ac48d3f71742114ba74b3f65eb4b2b5df6a19516b84. 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/GBC7N1045807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426e6115f492adf82d5d422e98c82d903fecbd3f5245be6776b558dcf66389bc. 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/GBF078540607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba486fd9ddfc7f33281ce50ccf0d13035b1b0901f37f693a1cad1299ec77489. 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/GBF079042312.
Cambridge University Musical Society Chorus
A Classical Coronation. Music for a Royal Celebration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd419c8a21c12bae1e4742f9f80959aeb5ac57a7188157afafb676008e2e3e2cb. 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/GBAYD8800505.
The Dam Busters - Rousing Songs, Anthems and Marches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dd312cf2ebacb92133febbe2eaec97b8328a496c505c209ef691f99c57fa51. 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/AUAB00350089.
Judith, Act I Scene 1. Moloch: Processional Music of Worshippers - Hail, Moloch! (Worshippers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df165f1df976d748bc27e29b9fd8b68ca6d8958a8e6b478e63ed8862c79cab8. 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/GBLWD2002002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8dbf23fe5eaeafe90ed6e545fc65c5bae9a6c4a4d8ad7ea902e731113d8cbf. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/GBC7N1045820.
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 0x3c1ec6562884d99807cd819d84af007009ea328fe61808c2f4fab78684f57b20. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKI190012506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05c4a8d90395591d5a7ad19bcfea299c112b9a7cd50ca0fa9bbc1845e27c010. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBF078540616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71760edf4f95c5ac6bd1307ca8f7322be11106d1341361e58b9a2129b2c5d1c5. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBEKZ0300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c32e988c60504be5e686aca1c077bec23e45fa284e3467779c35f272fa69ca. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBC7N1042416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3836599ccaa96370a4b6c87ccf786a8a89efdf80c11b28673845f1319ba39695. 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/GBXUX0870522.