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 0x2f4b3896bda18da3afd379ee77534bc02fbd9beba42bccdf886681c6a94eee30. 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/c0e2ab3b-8a58-40f2-a9e4-cb948fd8a8ed.json and https://artists.proofprofile.net/proofs/artist/c0e2ab3b-8a58-40f2-a9e4-cb948fd8a8ed.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 0x21e9f67c05285e247eb2e730c54027063c378c9b5806132f35736c383ae2a328. 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/QMYHE1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f876089ac63ff669de69749b5fe55b45114cac7b982f78360712080b583785. 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/QMYHE1100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4310808414c5b9e764e476f15131b0447dc3cc05dd128105da38b2a71ebe4ebc. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T20:51:33Z), 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/QMYHE1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee831d6229dfa18ab6acaad1fbc14c1b9aaf40523256c74619b01d05a5291e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:38:05Z), 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/QMYHE1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b8e7248e647eb0ee7fc79c2fd83e1a30f80987c405363fccf03ed696246003. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMYHE1100008.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c434df094408ebda28bf1c950f0b524fb6a38b15106fdaec065606f414eb10. 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/QMYHE1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a01e77dd13ba7cdc81b06d23c9fa9a828853a377ee9a51349f3317d901e3b5. 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/US25T0523220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c1587d8239e406b249577312a563170f230546b85c40438f6ea0c342b6a54. 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/US25T0523221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99235999b98e99cbc95de077ae34340e15f0b6e16a647067d024fb190bbf64e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US25T0523222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182da709e51a688c38462f74348239c5e7d0efebd0f7ba3f3289f29ebdc79b71. 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/US25T0523223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2207e9319a8731bbda5a97fb8b8cf90813e249e0843dafc20fc41dcf0f9af5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US25T0523225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41929e51b43f09f218e5dd49b22106661f3f3a0c8dc374d9ff75cc30cc122fe9. 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/US25T0523226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a22a8fe877b4d18e7fbe829a7e726633f2d58c9eb6506f260d23959a1aa852. 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/US25T0523227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d5e99ab06f9007147433a25b9491d0acbc0443236d553baf1d2cfad90f5aa. 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/US25T0523229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51d19fec84ba6325808fe17d01854ceeb54f978a3d9ee09b043be1818ed761f. 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/US25T0523224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf60a343504931df358d9944d475e47a170615d1588772fd47430b99c2f4420. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/US25T0523228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372fbd762cefc3f76224452e16930ca9809b002548e58bfd89133b989981cc8a. 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/QMYHE1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c28b4b2a17205c1ec34cf0936f54b8197a3cb68e6ea477322de0b75cdc53f9. 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/QMYHE1300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039bc4db62d6fb185a2be6d33ba197604caca6c787a3c69f3c4b979c9829d2b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QMYHE1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab4d1acdf5ab4e2b3bd575d8519dad6257d75d47b3b0fd1c0cc953ad705522. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMYHE1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ac109b272e59cc3f20bfa18d30c507271a0bddca39ba19394dbe15c89b1b08. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMYHE1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec21d03cb15feb9094f878b681429e38e3ef2b2233e7f9ab8e955037dc2fd48. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMYHE1300006.
Poncho Sanchez, Danilo Lozano, Adonis Puentes
Justo Almario, Danilo Lozano, Oscar Hernandez, Ramon Banda, Rene Camacho, Joey De Leon, Dayren SantamariaAlfredo Ortiz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e135190dc60638db1ee766156d8efa2d95c704fa27355e183b3997cd1632519. 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/QMYHE1100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172aee128f1f3ab46861c9e7a8b424a11c0deb96f058443a33467e4bb8c3b714. 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/QMYHE1100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad9a4c507c13bf1ccac7d204582266b66c6f58ffb702c3e67a734a67b7b0250. 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/QMYHE1100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac938113e2f057a295e203f9b1f1635d430e45f20aaa7292da3865c4e5e80bb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMYHE1100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa74358b64fd3a66eabb939d82a5d931c1bcb314801ab352645808fc636bfe7. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QMYHE1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bc1fbc0480ca80b29984620930435d053fe677e11c17d0e2e4aee61ad72d81. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMYHE1100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fde8f488b99b15fe62c1e0e11ab347ee6002160155df4254963dfec68259b7. 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/QZ4VZ1700025.
Bland, E.: Piece for Chamber Orchestra / for Bassoon / Sketches Set 7 / for Flute / Sketches Set 1 / Brass Quintet / for Flute