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 0xa8cf7cf2f14ffef371298630944614ffadab7cdcf8ec5d6e668cb654f47d3b24. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35aaf192-24b4-4b56-b10c-844d985d4498.json and https://artists.proofprofile.net/proofs/artist/35aaf192-24b4-4b56-b10c-844d985d4498.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
3 Quartets, Op. 31: No. 3. Der gang zum liebchen
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 0x941529422b44ca6d475b401581c0658b8af3b0e39977bb2a4457f3335726c5a1. 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/USG3E1629806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f3640d3a6b387764a86a853ae6e0ee3f4cc2483865d85bbf0d09ef76290285. 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/USG3E1629809.
4 Estonian Lullabies: No. 1. Laulan lapsele (I Sing for My Child)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239b9eca97d2bec3a6d7be13776487fc9cc6eaeddc5f88a3ae321ddd2e491c5d. 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/USG3E1629811.
4 Estonian Lullabies: No. 4. Aiutus (Lulling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe68e3a3ef7141ec607a828b61717e9299cf58aefa4f0dcaa30fd46db05df97f. 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/USG3E1629814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fde93e5c0a239025bf823b47fce8f251d87e3f343f075919353d06a3ea0b979. 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/USG3E1629816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de7f12e61ef178b5fa9379cdd6e3223682a7495967838a1c44b1cb3b9fb066e. 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/USG3E1629817.
Heavenly Display: Songs Inspired by Shaker Tunes
I Will Be a Child of Peace (Version for Mixed Choir & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25dda8ce3cfb7ee71e3eb0cf190adbdc955fde36662ea9cf55f425caa8817c3. 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/USG3E2032403.
When David Heard (Version for Mixed Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3aadc73c23f56ef375856ef1aab88edca26fbd1ba856fb944f1285787578f64. 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/USG3E2032405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295a5c7a598a80e2cb9a7e1c6f39251fd58482a772f90099d362bf17863550a5. 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/USG3E2032409.