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 0x38275c5be540795af2071beb5af4a2892f1028529bcca74d64c816631203829b. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c572a5e5-825e-4693-a5a9-bcfb5313e956.json and https://artists.proofprofile.net/proofs/artist/c572a5e5-825e-4693-a5a9-bcfb5313e956.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Black Composer Series, Vol. 5: José Mauricio Nunes Garcia: Requiem Mass (Remastered)
Requiem Mass: I. Introitus: Requiem aeternam
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 0x1db44303b0205c625d959bb4c0d6c419e081babdb66bc52d4a2b84a9d30d83ed. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USSM11806047.
Requiem Mass: IV. Sequence: Dies irae - Ingemisco - Inter oves
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7023d83c220427fc4386de59cf9e30ee0de8c751ffad0d9f5b9085349a292930. 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/USSM11806050.
Requiem Mass: VIII. Communio: Lux aeternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abf1e5df91d187755ec83219512fc511e40f871a3ddbcb8049e6a7a68b14069. 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/USSM11806318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de6a54a3e80ed3433ea472389a73d893ab34cca17faada838d529112524d094. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USSM11806048.
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
Requiem Mass: III. Gradual: Requiem aeternam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cbad2eb07b54967d0e93510599e7110c511ad595795adee51383453908618c. 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/USSM11806049.
Requiem Mass: V. Offertorio: Domine Jesu Christe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf83d61ce7b2122782b9a8ebce434a65120a3b02188d388c98c3f295757a626. 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/USSM11806052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4306673b03aa87ece59260393f35e2393bf4e98adcc7a7510a3b3f55e42583f7. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USSM11806053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a63515a0b7b00ccaaf8988f5a81f4a253c0f9d786ce9f0a48f2547d99fa34ff. 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/USSM11806317.
Black Composer Series, Vol. 4: Roque Cordero (Remastered)
Black Composer Series, Vol. 9: George Walker, Hale Smith & Adolphus Hailstorck (Remastered)
Black Composer Series, Vol. 8: Olly Woodrow Wilson, Thomas Jefferson Anderson, Jr. & Talib Rasul Hakim (Remastered)
Black Composer Series, Vol. 7: William Grant Still, Fela Sowande & George Walker (Remastered)
Music from African Suite for String Orchestra: III. Akinla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e297a9d39a59e0c183c1a5ee0e6b4276742eb0313ef0be7c900751d93d21fd6. 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/USSM11806066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc90407fd3d40c312a7aa8f041362674a8cdabb75533dd6ef1e11441bb5202e. 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/USSM11806067.
Black Composer Series, Vol. 6: José White & David Baker (Remastered)
Concerto for Violin and Orchestra: II. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8806101a52382bd3ff4dfdf176ed7a19ff229b99defeaf82d34aeccb643d10f6. 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/USSM11806056.
Black Composer Series, Vol. 3: Ulysses Simpson Kay & George Theophilus Walker (Remastered)
Black Composer Series, Vol. 2: William Grant Still & Samuel Coleridge-Taylor (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1991f78e21375da0e952e362a0733a5c77a6051d52ca1099074ff777a8a6c1. 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/USSM11805815.
Afro-American Symphony: IV. Lento con risolutione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee20a3b4f6f19623782cc84cf54ba0634a531faa551c2486285b530be2cbbe6. 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/USSM11805817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eec448154a70f2d89b0449b982fd23a87427a0ccb0cbcbd7827c378e24abd4c. 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/USSM11805820.
Afro-American Symphony: I. Moderato assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355e0fa78cf8ac468b2c21f67aa8550f9bb89b855e946d8b2bf6c47d5d83b143. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USSM11805814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be2143a40c7999c85837fad2f9a29b822b8e13cfaf8594061791afae5ebc987. 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/USSM11805816.
Black Composer Series, Vol. 1: Chevalier de Saint-Georges (Remastered)
Symphony No. 1 in G Major, Op. 11, No. 1: III. Allegro assai
Joseph Boulogne Chevalier de Saint-Georges
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11116b40496feab7ba3be8e46aef522d8c4fdcf5ff88fcb712098fb498e40673. 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/USSM11805781.
String Quartet No. 1 in C Major, Op. 1, No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1522f1bcc37eb66321bf8a8a44ae205e596f98d5b5ee6d2247fdb8b2bf2521. 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/USSM11805783.
String Quartet No. 1 in C Major, Op. 1, No. 1: II. Rondeau: Tempo di minuetto; Grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2297ecc443434e480ffcc66f421793ee7adc9fc1471bc812c41d6ba0322804. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USSM11805784.
Symphonie Concertante in G Major for Two Violins and Orchestra, Op. 13: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddc61506e7de36b3a8166e933a55c61a72899a5b828a3a461ef4d0bdb0c7a33. 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/USSM11805786.
Symphonie Concertante in G Major for Two Violins and Orchestra, Op. 13: II. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1feffb8c99062e0d2dbfc9d4550ccd54cce0478d2930d47da1e9bc0af17a177f. 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/USSM11805787.
Symphony No. 1 in G Major, Op. 11, No. 1: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c92682d3db3bca6f4fac9fa756e788e132e1f316a71891ecb324f23c81b5144. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USSM11805779.
Symphony No. 1 in G Major, Op. 11, No. 1: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af885b16e2a862604f988b4b76472cc08ff2c7884adbcea7af06b4b01379480. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USSM11805780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b005f6efb949c2b572cf962f0c6661077936502c5ae9c95fe33d4cd5b46068c. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USSM11805788.