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 0xc2372a5bddcc51572cb7849dca3a28b06cb5959f4144b885cf343f6b0761f2b1. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a53b7784-ef5c-4022-97bb-3031a467a49b.json and https://artists.proofprofile.net/proofs/artist/a53b7784-ef5c-4022-97bb-3031a467a49b.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 0x9ae7087dae3efcddd726e708d3c421a4815a99ca6d10e3b287ae51c8af342862. 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/SEAED2539020.
Apollon musagète, Second tableau (Arr. for Chamber Ensemble by J. Azkoul): Variation d’Apollon (Apollon et les Muses)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc478611617a347c6273b6349985d348a794fd1fedb0cdca89474558cce3ec5ac. 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/SEAED2539050.
Apollon musagète, Second tableau (Arr. for Chamber Ensemble by J. Azkoul): Pas d’action (Apollon et les trois Muses: Calliope, Polymnie et Terpsichore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c12586f76ff858cce67a3af92555a34ea17706331fb73132adb8afbeb3dc2bf. 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/SEAED2539060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b7024a7649d7485f9e3828f24226f832471624ef33ec4d19af37ee8f0daac3. 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/SEAED2539140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396957650abaea8013348ecf910cce3d348e4ee97b8b68a91cbfc016d2790b7c. 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/SEAED2539150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7d67e2731d5bd688600263ce8085aaf07e3e76cd8280bc5325f76fb1591d0e. 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/SEAED2539160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929dd39b718f47922f2ed4c8de6ab5cf93197889b3a4a193040bafedcb9053fe. 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/SEAED2539180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51640c6640a964b3990a78b7b88432a5ba965fa902aa24f44f79a847ea61fd3. 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/SEAED2539010.
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 0xe701a3ad01db1c73390700cfe64d36d3b01fe5010a88bb33b5a7cb7e7887b0e5. 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/SEAED2539030.
Apollon musagète, Premier tableau (Arr. for Chamber Ensemble by J. Azkoul): Naissance d’Apollon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922aaf6c46456333229f721e0bcce70ca15bfaa10f8c171bef85ead0065e8eb5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SEAED2539040.
Apollon musagète, Second tableau (Arr. for Chamber Ensemble by J. Azkoul): Variation d’Apollon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341e33703e914e53dc210ddbb5c44f3de234c6f53fc76aaebc84aefa2dfff890. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEAED2539100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c63155a2f026af91f41cce6f3969b1908ebc87cc8a6c8e6c1f0d51f2519a511. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEAED2539170.
In Winter's House (Arr. J. Azkoul for String Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eb967ce00a19c385d95d38b876730079db2351d5be8699d5e30477d45c7115. 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/SEAEB2149010.
Entr'acte (Version for String Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b32665c0ae6e3273f39d5b8df6841011c8af0e2f930ad0beaac864c3ebada38. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEAEB2149020.
3 Songs for Soprano & String Orchestra: No. 1, Night of the Flying Horses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba61e728fa094ab1e29871f6ea7219debe1ddf4a6bf4d3ad9d4226e25ff3f34d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEAEB2149030.
3 Songs for Soprano & String Orchestra: No. 2, Lúa Descolorida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006c7a8995b6f164d73467e0716e63f5f010a9ecf3e289f29695f769ef562718. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SEAEB2149040.