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 0xc6693a208c76ff1ba4868794c319919d385382c7585781112e1892364a862e1e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ead50ce8-f05b-4d0e-bcff-4d62a07061e2.json and https://artists.proofprofile.net/proofs/artist/ead50ce8-f05b-4d0e-bcff-4d62a07061e2.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 0xb242d4cf92260d69684f86f27e165d6f019df670badde5eddd802ad3eade2afc. 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/DEY321913001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8470eee00e2a127950374b75657fd75b75d19c9624bc274002aafde4fdc0c8f9. 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/FRU621323625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd210f8a99cdb6fe953356878ce9ba9f47cb714c97f52eaf88a5c4c8eba4d7a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FRU621323642.
La Boda de Luis Alonso, pour castagnettes et orchestre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecae5cad3fe94cf98b663b4b5668a491491a6ab6148d6cad6b598e4bdef9fc6. 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/FRU621323649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d4f590a86b85d0c41241aaac0a0b579fee00d1cde1420cc83568b769e8ea6c. 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/NOEFZ1840010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf01c698b35288f8ca0c03d2207ef760cf1f5000dbe45b9419898fc0942987e2. 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/NOEFZ1840060.
Stille Nächte - Weihnachtsmusik aus Europa, Vol. III - Silent Nights
Toccata (Arr. for Harp and Theorbo) - From "Vatican, Biblioteca Apostolica, MSS Chigi Q. IV.24, ff. 54v-55"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ebd797e37b0c76d74d4843873ed1256ad10d9dfdc4ca30e8a78d5e9ba012ca. 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/BEBI80611002.
Balletto (Arr. for Harp and Baroque Guitar) - From "Vatican, Biblioteca Apostolica, MSS Chigi Q. IV.28, ff. 44-45v"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073513bcb5bf8516f54c391bba5609d275472119e8287a5dce659b38aa773998. 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/BEBI80611010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456d47ea9db6366bfd51b37ebca309ca22ef9da952dfe48a0295afc44a8922d7. 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/DEB331022601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fee3e9923266ced38631773354b8379fc1bc9d910f7ef56d72e28ebd7a2cf8. 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/DEB331022602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4218c2547dcf582bdbcb8aa9b87d0ea04fa97619e2585bd19309dc9496d6f286. 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/DEB331022605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edc9ba01945b8c4e26104dcca6a2c14bc2f4a122fc7a31262fff776c732656a. 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/DEB331022606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab4c35553c6e1c0a53d35a48c6398102e4b12b4072704a3f68e63a9eed4c3e. 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/DEB331022608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6073f753f51c845d07d05b64e42a2d0131e481e78a338ca2a2631303ce582e. 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/DEB331022609.
Mitten im kalten Winter - Weihnachtsmusik aus Europa, Vol. II
Pulchra es amica mea aus der Marienvesper
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8160f7e047d644e0a4311442d12df1666e284fbcc4797dde08e5c7ba9737530e. 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/ATP571571020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79de0a4b2ae57642b16485b9f2f633bb75aff72e4949e1fe8603b7575c34370f. 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/NOZ5C2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb353878c3a61d6a33c073b0b8027e4e232ed1bef26a7475fcf4d16ad94ec7c. 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/NOZ5C2301050.
Concerto en La Majeur, BWV 1005A: Concerto en La Majeur, BWV 1005A: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02088caef93701139564f029e5b96aeed8aa52289c8fe770540ae17dfe28f12b. 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/FRU620500901.
Concerto en La Majeur, BWV 1005A: Concerto en La Majeur, BWV 1005A: III. Allegro Ma Non Troppo/tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b30e81b5e5e5271d63e36477a3263b9fbeadc53201336a21a8d2531be7d6f3. 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/FRU620500903.
Weichet Nur, Betrübte Schatten, BWV 202: Weichet Nur, Betrübte Schatten, BWV 202: Aria - Drum Sucht Auch Amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96076ed9e852250f61c436aa80908e2881eccea350480a6d9696b404b460914c. 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/FRU620500907.
Weichet Nur, Betrübte Schatten, BWV 202: Weichet Nur, Betrübte Schatten, BWV 202: Récitatif - Wenn Die Frühlingslüfte Streichen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb918ad13d92299502031ea056dd094ef8f3a504b1fa39526a4b1d26d1f41d4. 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/FRU620500908.
Weichet Nur, Betrübte Schatten, BWV 202: Weichet Nur, Betrübte Schatten, BWV 202: Récitatif - Und Dieses Ist Das Glücke
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7252acdf36eb2d300e3e6241d954a52227b748347951cc525da0613e3a2956. 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/FRU620500909.
Weichet Nur, Betrübte Schatten, BWV 202: Weichet Nur, Betrübte Schatten, BWV 202: Aria - Sich Üben Im Lieben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e28ce10a56035f0ebad5124acc090599e03d1445a76ff0a87cbe1c97133fe2. 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/FRU620500910.
Weichet Nur, Betrübte Schatten, BWV 202: Weichet Nur, Betrübte Schatten, BWV 202: Gavotte - Sehet In Zufriedenheit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3741d1fc23857bbe3116418b4232e0036a73d0907f63c57147b65a364b85fa4. 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/FRU620500912.
Concerto Pour Harpe No. 1 en Si Majeur, Op. 4 No. 6: Concerto Pour Harpe No. 1 en Si Majeur, Op. 4 No. 6: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80944c66a81f2b7b5f47b9d35ccb0ff459b12fbba2d9027ad8531ae6e4f8ad07. 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/FRU620500914.
Tra Le Fiamme, HWV 170: Tra Le Fiamme, HWV 170: Aria - Pien Di Nuovo e Bel Diletto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536be745675c5cbf75ded8dc804352ac9646d2be9284dfff0196c270de22d067. 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/FRU620500918.
Tra Le Fiamme, HWV 170: Tra Le Fiamme, HWV 170: Aria - Tra Le Fiamme Tu Scherzi Per Gioco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55f33246d6235b3e7b112de248da65badee496f64e9317710f66799175c381. 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/FRU620500922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64eda7aac77b05622be4ba4f6c04d5751bde7a7e8e5996c247369acb7a80520. 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/NOZ5C2401010.
Stabat Mater, RV 621: I. Stabat Mater dolorosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd65ea35c2df2076850a055c096d97e40acac651be9030db6f194578ae2308a6. 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/FRU621427703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1280b661caff8b7210b3ea00db02e0d0664c170c50b7415658a79726f13cf9f1. 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/NOZ5C2501020.