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 0x1ed217fa3bd170f5dc8ed6e86a6c8922a81862f496c4df754ebff0fe796b2743. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86ada133-0c23-4bba-9df2-f3efbc278e8e.json and https://artists.proofprofile.net/proofs/artist/86ada133-0c23-4bba-9df2-f3efbc278e8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'Astarto: Finché spera che le rieda (Aria)
Athalia - Oratorio in three Acts, HWV 52: Act I: Gigue
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 0x7d294645f716270cd545d7a96e1fc2414fcaf5ec36fa290046e6744f1fdc17ce. 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/DEE471000164.
Athalia - Oratorio in three Acts, HWV 52: Act I: Allelujah (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15700752797075eef78b1cb429108ae37dbe023db9969051213900683e3d755b. 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/DEE471000186.
Bach, J.S.: Ich hatte viel Bekümmernis, Cantata BWV 21; Herz und Mund und Tat und Leben, Cantata BWV 147
Ich hatte viel Bekümmernis, Cantata BWV 21 / Pt. 1: 2. "Ich hatte viel Bekümmernis"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad63a6c4e3167acf91f83a2dbb8bc78b77dd813a7a6e1500c1c9f6e63ecd7aa0. 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/DEB112005102.
Ich hatte viel Bekümmernis, Cantata BWV 21 / Pt. 1: 3. "Seufzer, Tränen, Kummer, Not"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4288f9c72cc5a825ec02c923b1293e337572aa0a2bf161cbbf6b8307614252a0. 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/DEB112005103.
Ich hatte viel Bekümmernis, Cantata BWV 21 / Pt. 1: 5. "Bäche von gesalznen Zähren"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb5fb8f6f1677c04a2cb4357e557257103dfe7683d559bd27716eff83217a89. 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/DEB112005105.
Herz und Mund und Tat und Leben, Cantata BWV 147 / Pt. 1: 1. "Herz und Mund und Tat und Leben"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb7616c421e5cd9bb9b46ade5d1276c87bdc32990f3b08e7201b215def37993. 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/DEB112005112.
Herz und Mund und Tat und Leben, Cantata BWV 147 / Pt. 1: 6. "Wohl mir, dass ich Jesum habe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e9182490a782cb76262ba8b98c8e72e5be64da7001d6f1cdb1ed0a9c16cfb8. 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/DEB112005117.
Il giuoco del quadriglio: Ah se tocasse a me (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7048b0cf68ce2ceba7845351433b45a4b554dd52fe435ae94d4bba329c0f2454. 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/DEE471400578.
Il Gioseffo: Bramo un core che impari dal mio (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d0fc8745e358b861f7155225b4d0ab877903df937e520a1c7c274e3923a3b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEE471400576.
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
Sonata No. 14 in G Minor: III. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9360272cd6c247e58b0f55d2445119c29eecfb978851d12849ac14aa3631e294. 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/DEE471800007.
Nicomede, IPT 15: Amorosa rondinella (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8fc915a5e7df9640962fc4706c6dd057763c878da36bae92e94793d710efeb. 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/DEE471800009.
Engelberta: Usignolo che col volo (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd869fc1380e01cd7890314ef8c3cfc14e12c18f811ec9f7f2f80535ef3398e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEE471800001.
Ifigenia in Tauride, ILV 14: Rondinella che dal nido (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740f7a3c4b7d8909218057ad7b37fb8c2e4d45c762dd34f13ac1405e7f3b9a76. 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/DEE471800002.
Didone abbandonata, IJH 36: L'augelletto in lacci stretto (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dae634e31f1448457a08692291a341f8691ce9f06ad431567779757add1a85. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEE471800011.
Monteverdi: L'incoronazione di Poppea, SV 308, Act 3: "Pur ti miro" (Nerone, Poppea)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3a9b70070d0afacb04dc4ce2589a8f837e813ccfb7efc3c61ebb181d75e2dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYC0802534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3a9b70070d0afacb04dc4ce2589a8f837e813ccfb7efc3c61ebb181d75e2dd. 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/GBAYC0802534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3a9b70070d0afacb04dc4ce2589a8f837e813ccfb7efc3c61ebb181d75e2dd. 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/GBAYC0802534.
Ave maris stella: VII. Vitam praesta puram
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e18338fb43cf4a7f99a3ced4a9e7f0f132d51559d3801529a2926dcec4b3505. 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/MX2831000360.
Ave maris stella: VIII. Sit laus Deo Patri. Amen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff06092bc1f51a58958df93d5a75f69ece69763417724f1142bb96418b8b7696. 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/MX2831000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053b890e5d3485c66afb4475795f2d521f6c277941a90ca7eb0c81679565f8e5. 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/MX2831000362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb654b6c72b77ef72e8acbe4e0b007ecc6af0ec41b18f66338ee0c2d17dad2b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBF071301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b997c1e7114226dbba6a8c7af2884944349ac9d0951dc90b6b96cbbfe85d31. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBF071301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e93294a9b1080ea8808043040e9fde419bd774a63a8fc4867e96d994444af0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/MX2831000380.
Magnificat: VIII. Deposuit potentes (16th c.)
Meditation Music: Meditative Music Across Ten Centuries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f04ba6c48629688340fe3ae7cc477f8018e1b4e1f0ad85a3f15fcfffd6b74. 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/ES7141500241.
Deposuit potentes (Voice & 16th Century Positive Organ)
Dictionary of Medieval & Renaissance Instruments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa2fbf3ce0805d2f9e94425d43d5fa87525f381ec17fbbe19d948ae25504068. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/MX2831000732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ba56d518727bc010b412acc84d4b8188253b7b061ec509aa2ffcc8ea2fe28f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/MX2831000351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ff6b973508cb2fda171c75c7fc4c8769cfe1b504601f9ac7facc0fc1ff572d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/MX2831000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ccaada03d177cab4e2e4ca69b878e0d647617440aaa280b4649e9e5c94c0fb. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/MX2831000357.
Ave maris stella: V. Monstra te esse matrem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1350d496f7b48fe7709b13cbded2ddf495bc144dbcb282ee7d8ced620255bf. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/MX2831000358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac9356e9c17a0b918b190064a3592113f127847e3bda6cfd31983274239c888. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/MX2831000359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ee1ed476af867aab99687c267a24e43d0afee2cdb0619cd248f8541d8352fa. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/MX2831000364.