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 0xe5fbc0e4a13b4bb95d4978b513873f5062b1b33c85eb331ff9842770e9b18e80. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c65b3c2-6a90-4020-a6ff-6357128f2e09.json and https://artists.proofprofile.net/proofs/artist/3c65b3c2-6a90-4020-a6ff-6357128f2e09.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 0x936861877afdcc6d09fbf9686bc4bf787266570c6bcaccb36cc3582f3d6900d2. 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/GBARU9300004.
Ave Maria - Die schönste geistliche Musik
Le Quattro Stagioni: Violin Concerto No. 4 in F Minor, RV 297 "L'Inverno": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ef50a756ad3a30b1c8aafee7d7cebdcf0eb3cf695bdfa9847bec447a78940c. 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/USBC10100768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9eb57534af8f3ba20177ab74a4f32f5d331c639bc24731a24d3706e05738e1. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USSM19200445.
Te decet laus (Conclusion of the Matins)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe796d4c2dacd4fd661e4f4583d02f68db2612189422c9e62730dbd3522af0737. 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/USSM17800112.
Gloria in excelsis Deo (Grand Doxology - Hymn to the Angels)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062a65ac3437a263de4509b11e61a1eca98491aa4753009f29526f966f49b7a1. 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/USSM17800113.
Laetabundus exsultet fidelis chorus (Sequence for Christmas, Third Mass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5214486e22ef7c9c075dcf6b5ba00221bd9cb131de39d80ca4c485bef141117. 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/USSM18000418.
Procedamus in pace! - Cum angelis + Psalm 24 (23), Verses 7-10 (Antiphon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede8f821a4fb6bd9ecb5efa33ddc64447445f5d3538373c1b08de5b9b0a11ca. 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/USSM17600330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e12b3a6197674f7fb313a3b8a0477741f0988e4e4363eb85d3721dc3b9508d. 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/USSM19200447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed68eac2023c5b7d0360fa32574f1066615a7e9f4bae5425d5e1f2e9d67c6e9f. 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/USSM19200449.
Mediae noctis tempus est (Hymn for the Night Vigil)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e22f57be3d8e2055a62fa31a0868918e22797d607cfd761e5697bb452c4cf9. 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/USSM17800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a89cd5d15f8ac06dad5e9dd2cb92667c24df7c6cc1a4635c91c3870a691d50. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USSM19200451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae574dc321aa47ce9b8bf6a411e6f240ba8f0fedc7e696b87b7a20d49bac22d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM19200452.
Sancti, venite, Christi corpus (Celtic Hymn for Holy Thursday)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b3637595a3d2c19fe51c7dc2e607bb2fd7a27dad08e736c29aef3a76e322a1. 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/USSM17800118.
Omnes gentes, plaudite (Sequence for the Ascension)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d07d26d3285364bcf808845f4c646a89eec12b7d04a612999654418b66c8c3. 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/USSM18000424.
Pacem relinquo vobis - Laudate Dominum omnes gentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6296eb7e8c2b18d80a6045f4e843b8b6ae1a6296ec637c01e695e4048c67ebd7. 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/USSM19200454.
Hic est dies verus Dei (Hymn for the Easter Liturgy of Milan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8e053ffb715b234efdccf32a69d33fe45aca1999c83803990390e5ae0f047a. 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/USSM17800121.
Rex caeli, Domine maris (Musica enchiriadis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a5ff79d039605662eb2381697c4bfc7bc9fe65a961482f79021b46930d01c2. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USSM18000427.
Beata nobis gaudia (Hymn at Lauds for Pentecost)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc91c927789e283bd2c22067c10e7247f804d2e9b93906504a428525b516668. 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/USSM17800122.
Ut queant laxis (Hymn to St. John the Baptist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c75daef944e1968a2315336a52703ff1f425f5d84fead2649a49e0aa31c327. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USSM17800124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc52b1c9eb2f920cf7f3ce3027180bf64aa4335c7997da03bbde37268061d72. 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/USSM19200459.
Aurea luce (Hymn for Vespers at the Feasts of Saints Peter and Paul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a17948091647a71a3b9a0679e357a005e2b2ac828d175a267566079243ede40. 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/USSM17800125.
NPR Milestones of the Millennium: CHANT - Hymns and Sequences - Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c75daef944e1968a2315336a52703ff1f425f5d84fead2649a49e0aa31c327. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM17800124.
The Quintessence of Chant (Gregorianische Gesänge I & II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa6b74909aef6566f2d826040d0eb657886cf8cccf371f201b3d86f3fd0284. 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/USSM19504314.
Resonet in laudibus - Legend of a Christmas Song
Antienne: Nigra Sum Sed Formosa - Psaume 121: Laetatus Sum in His
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf1ab25dde7061821412d58a9ecd81181a2b9ac6781756561e4611b60fb74f. 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/DEE869400474.
Sancta Maria - Geistliche Musik aus dem Stift Heiligenkreuz
Gregorianik - Die schönsten gregorianischen Choräle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1e75debe570666100de6c0e9fc1ddf1b1166e110a408fb3c03afde882a0dcf. 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/DEE869400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac44eb79aed6a18a196935a896de9cd4192cd5ea4b8aa0ab0f148aa226c225ef. 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/DEE869400470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf1ab25dde7061821412d58a9ecd81181a2b9ac6781756561e4611b60fb74f. 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/DEE869400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38e706cd1bebcd1a015ab9b94bc096522bb59d653595bbe9525a9c66bbab339. 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/DEE869400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e1765e76382ab62cdcab0cc5652cbc0720f86265c3717f701a15a7a83a99f9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE869400477.
Antienne: Cum Audisset Salutationem Mariae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225c2e820bd335dbf8c2767011ee5c4aff97de15a870cd239de317f2b5fe6cb1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE869400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22a468dd9b31a75297f94d1fcff619c0fbd4ea4f2fab3c40e443cd7b3a6985. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE869400479.
Antienne Mariale et Trope: Salve Regina Misericordae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8ba0ca9837bc6174d67bdf22e9d7d838966dbd2f1b240fdc0acd2577efff60. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE869400488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa6b74909aef6566f2d826040d0eb657886cf8cccf371f201b3d86f3fd0284. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USSM19504314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7df07c7979ba987303ef9c059f01061fc58aa9b8bb0eb0c272a61ee95be953. 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/USSM19504322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a89cd5d15f8ac06dad5e9dd2cb92667c24df7c6cc1a4635c91c3870a691d50. 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/USSM19200451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ab14dc15be888c00d67bc23038d95278510fee024a754dac1a7b440044483b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:46Z), 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/USSM19504308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ede8f821a4fb6bd9ecb5efa33ddc64447445f5d3538373c1b08de5b9b0a11ca. 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/USSM17600330.
Resurrection Part I: Composed Music Works