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 0xc1b9abe5a8ce80077d7f0b818a7c832fdfd950adc2b748bf902cedcc8c4d5a18. 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/b921c291-ef57-4500-8c7c-e34ad94db800.json and https://artists.proofprofile.net/proofs/artist/b921c291-ef57-4500-8c7c-e34ad94db800.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trial by Jury: Oh Gentlemen Listen I Pray (Defendant, Chorus of Bridesmaids)
Chamber Choir of the Royal Welsh College of Music and Drama
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 0x5cf296087140d52764959522393b71d43f20b07e415478a65efc6f21aea2e6c3. 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/GBLWD0506827.
Trial by Jury: I Love Him - I Love Him (Plaintiff, Defendant, Judge, Counsel, Foreman, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b2c0999d36a440516218652d4979b4f78fb5d7501f9e3dff8fbd15ad79fd31. 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/GBLWD0506830.
Trial by Jury: Hark, the Hour of Ten is Sounding (Usher, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3955c7a7ebcde646e90d23760afdb4d4ee7af49176a5fafae8b0ba52744a6fa. 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/GBLWD0506817.
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
Trial by Jury: Oh Never, Never, Never… (Judge, Foreman, Plaintiff, Usher, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c26067f98fa6bc2d408740c8038e717d1e7bd8c1e8400f50d95788f06dd3e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBLWD0506824.
Trial by Jury: That She is Reeling is Plain to See! (Judge, Foreman, Plaintiff, Counsel, Defendant, Usher, Foreman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83a287ccbdb37f71ba7b98b33b8837264243fb2ac04ecb9e79a2251af1fd77a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLWD0506826.
Trial by Jury: Oh Joy Unbounded (Plaintiff, Counsel, Defendant, Usher, Judge, Foreman, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c91b8f333829614d4b0c155ff5f7eeb3b65502409f0b5e0d90b9e002f1056. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBLWD0506831.
Symphony No. 9 in D Minor, Op. 125 "Choral": II. Molto vivace
Beethoven, Van L.: Symphony No. 9, "Choral"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807585d25cf1180f9cb736b3d9232029780e9446bf04553ca93126d6dc7007f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEAEQ0616020.
Symphony No. 9 in D Minor, Op. 125, "Choral": IV. Finale. Presto - Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e16341a2a7c9bd50c5219d14ccfaea649fcdcb89d1ba79c0d3b18c3f20037fa. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SEAEQ0616040.
Britten: Billy Budd, Op. 50, Act 1, Scene 1: "Your Name? Billy Budd, Sir" (Claggart, Billy, Redburn, Flint)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dead287cd9320ed11066ad27aca19d1fa2fd0f8bb3ff6a033f06c7f76327008. 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/GBAYC0801586.
Britten: Billy Budd, Op. 50, Act 1, Scene 2: "Mr Redburn and Mr Flint, Sir!" (Boy, Vere, Redburn, Flint)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9190aa9268e5895dbb319687b5dc649d90ec49dea735bfae7ce0e6a4650ad9f. 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/GBAYC0801594.
Symphony No. 9 in D Minor, Op. 125 "Choral": I. Allegro ma non troppo, un poco maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb314519138215689bdac1927fa71f5a1052d4cfef86790a95942309ef640da07. 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/SEAEQ0616010.
Britten: Billy Budd, Op. 50, Act 1, Scene 2: "We Are, Sir, Claggart Is an Able One" (Redburn, Vere, Flint, Sailors, Ratcliffe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75295d0b0394b6510c2022f9cf1747c66c26a859f29c011a54e97efcb0f9a19f. 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/GBAYC0801596.
Symphony No. 9 in D Minor, Op. 125 "Choral": III. Adagio molto e cantabile - Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c3e6c7c905abad767947cfd261489d8a97b461a46dd837def23e2b27c8b3cd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEAEQ0616030.
Britten: Billy Budd, Op. 50, Act 1, Scene 1: "Boat Ahoy" (Maintop, Midshipmen, Flint, Redburn, Bosun, Ratcliffe, Claggart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616baad29167a2374ba098d767159736cd71fd431ef0118907fdd537b8d5761e. 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/GBAYC0801584.
Britten: Billy Budd, Op. 50, Act 1, Scene 1: "First Man Forward! (Claggart, Red Whiskers, Redburn, Flint, Jones)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052b2c3c53853bb8fe77d3d62809527da90383b5ac626033093d4c65eba42195. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/GBAYC0801585.
Britten: Billy Budd, Op. 50, Act 1, Scene 1: "Billy Budd, King of the Birds!" (Billy, Sailors, Flint, Redburn, Ratcliffe, Claggart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b58bce1c56530d6f54d3998aea19ad24dc44199989e37375458465b8c58bd9c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC0801587.
Britten: Billy Budd, Op. 50, Act 2, Scene 1: "I Don't Like the Look of the Mist" (Vere, Redburn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c9de356c8b38d4cb012abe91e53baf72c5e3a74107ecefe3633e60c1f14e61. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAYC0801604.
Britten: Billy Budd, Op. 50, Act 2, Scene 1: "Deck Ahoy! Enemy Sail on Starboard Bow!" (Maintop, Bosun, Flint, Redburn, Ratcliffe, Sailors, Vere)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c5af5e6dc6540a730131b8bcdc206bfc2ed176cbbbf9ba3ab83330517592f3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBAYC0801606.
Britten: Billy Budd, Op. 50, Act 2, Scene 1: "Volunteers! Call for Boarding Volunteers!" (Vere, Redburn, Donald, Red Whiskers, Dansker, Sailors, Billy, Maintop, Ratcliffe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbb4b718c5f0b7f891c1d5507e000deff8e348646e91201a7b31c971ff13981. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBAYC0801607.
Britten: Billy Budd, Op. 50, Act 2, Scene 2: "Gentlemen, William Budd Here Has Killed" (Vere, Redburn, Flint, Ratcliffe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ea8e56201656b0d07c404acde5d479b932263f23fe03e9d26609d493e9185. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBAYC0801613.