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 0x70dfe9425d2cf32044096de9793f16e628106a4beff354725916abf226c99d40. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aca1f9d4-66a4-4daa-bb62-a0ab8920be14.json and https://artists.proofprofile.net/proofs/artist/aca1f9d4-66a4-4daa-bb62-a0ab8920be14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
King Arthur, Z. 628, First Music: Overture
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 0x84de2652d1e48ba5b2b52e59faad436d71eb4edbde0157dc143c213ceb004296. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:33:23Z), 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/FR50X1843001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34006e6ba876a8409f71cd377d20c8331c9069d469ec6f6704ae592cb33b228d. 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/FR50X1843035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e24e39f65756a6e13a7c119687403748d9869ba642a718c72f160f8bfafd222. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/FR50X1843002.
King Arthur, Z. 628, Act IV: In Vain Are Our Graces
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae41e7a5de828cfa3d38112835d419661c5ad777f2b628e9a9e467b7e6c6109e. 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/FR50X1843039.
King Arthur, Z. 628, Act IV: Fourth Act Tune - Trumpet Tune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5b0134f8bf578db37d9a81522079013afd1ae07e27a8fce34a49f71228347b. 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/FR50X1843040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c64963e89205f04c14a028f8fb74a566620eaf103c726a33a1888b622bffd. 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/FR50X1843042.
King Arthur, Z. 628, Act V: Song tune - Fairest Isle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9893ec444fd6ef63e6be29b3423e9ee792119ecf61fb67522652410db0dc2b19. 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/FR50X1843046.
King Arthur, Z. 628, Act V: You Say, 'Tis Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdb0b8b9d8b126dd3b795f4064b9e09f998d07b781762e0824865cd6b783bc1. 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/FR50X1843047.
King Arthur, Z. 628, Act III: What Power Art Thou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d24b30a9b9e9ad39474972b75a9c22fb01d7dbb9526c68892c8d5e6bb230bb6. 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/FR50X1843023.
King Arthur, Z. 628, Act III: See We Assemble Thy Tevels to Hold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd492bef3f06311290b07e34a7d9ce01e65ef1de94a0d5a42e9fd819748912b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR50X1843028.
King Arthur, Z. 628, Act III: Sound a Parley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0022529c64581b06a472fe06518043ffa89b23ed83a2bb2205bafb8e1d513e90. 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/FR50X1843031.
King Arthur, Z. 628, Act III: 'Tis Love That Has Warm'd Us
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9400ce547e25b91012609e17e6cf3d8db1990635c98324c46454c4d653acfd90. 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/FR50X1843032.
King Arthur, Z. 628, Act III: Third Act Tune - Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679cf76074c2f39a7d97c773e129ddaa65303c36e61fd0b4a8fe53629e0df58f. 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/FR50X1843034.
Libera me in C Minor, HocJ E.2: III. Dum veneris iudicare
Jommelli: Missa pro Defunctis, Libera me & Miserere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde31919eb26189e655505a78a41729d923db71bd16a1eb90fc9df574ddc1daa8. 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/BEE022007625.
Ich fahre auf zu meinem Vater, TWV 1:825: I. Chorus "Ich fahre auf zu meinem Vater"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d9cadf46ddebbea4a05465b6eff1bd989659c6bed543e71d93a69d9e124b4. 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/FR50X2203210.
Libera me in C Minor, HocJ E.2: VII. Dum veneris iudicare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b59d4cf16c13fd6c025947a91cf3db436e0b91cd562dee45a893a4fa1c0bd6. 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/BEE022007629.
Aus der Tiefen rufe ich, Herr, zu dir in G Minor, BWV 131: IV. Aria & Chorale "Meine Seele wartet auf den Herrn"
Bach: Actus Tragicus (Cantatas BWV 106, 150, 131, 12)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670bd198db81e181777e621bdc2b1654c999b1612427ebeebf08f63c72c018d7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:02:22Z), 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/FR50X1625819.
Christ lag in Todesbanden, BWV 4: VI. Hie ist das rechte Osterlamm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb94f33079eef956afafc58209deffb0e2e32ecbea09fb0d34823beb14789aeb. 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/BER181840111.
Auf Christi Himmelfahrt allein, BWV 128: III. Aria & Recitative "Auf, auf, mit hellem Schall"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087e27435ac0838e200feef41b181ecf98165a13850a2d8047fa79ea01e2b6e5. 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/FR50X2203220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a231e6ae1c6dba45540a5ba51cafd4c62f470c3155e0f0342b7b5dea22d6a1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BER181840105.
Magnificat in D Major, BWV 243: V. Aria "Quia fecit mihi magna"
Bach: Magnificat - Handel: Dixit Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd7cdb1b3a23272d8807ec7cb0818a19b6153faf6af2cbd5d9d72ed81069047. 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/FR50X1737005.
Gott hilf mir, denn das Wasser geht mir bis an die Seele, BuxWV 34: II. Gott hilf Mir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe525a14e69c8e13699c08912052d765b27a0a3bf981119119acc49be9f742046. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR50X1728702.
Jesu, meine Freude, BuxWV 60: IV. Trotz dem alten Drachen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4106a2d334e2bacf13301550b07ba4a4cd72892259aea1fec742c3521d5ff578. 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/FR50X1728712.
Jesu, meine Freude, BuxWV 60: V. Weg mit allen Schätzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c6feb67f0012693cc76f5058cea46a1b1662c27f36b915f38205824b7648ce. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR50X1728713.
Missa pro Defunctis in E-Flat Major, HocJ A1.3: II. Kyrie, 2. Christe eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7788bf23edc474e8c193b640499f9ece209750e4cb21cff29c90aab67480886. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/BEE022007603.