right|200px Carlo Cossutta (; May 8, 1932 – January 22, 2000) was a prominent Italian dramatic tenor of Slovene descent who had a major international opera career from the mid-1950s through the late
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 0x14711a28acfa310176e9f02a49424a199d6bedd4387a14cdba85c38a56530e2c. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac513cd0-aa2d-4e93-ae06-74aed29e68d9.json and https://artists.proofprofile.net/proofs/artist/ac513cd0-aa2d-4e93-ae06-74aed29e68d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Verdi: Macbeth (Excerpts) [Wiener Staatsoper Live]
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 0xa0358d93242fd3a3f3ede3cd79aae34245ff248eabadfd44183eefeb37cc731c. 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/GBF076140313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff4adf35f132b8d6aace9e4e73d6c535ac9b89dfa3911c0536c13d0eec15741. 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/GBF079910850.
Saint-Saëns: Samson et Dalila (Live 1988)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c616634cd3cd4872175dd0b93e0644f5762143ef88e5ae78005c0b74511cc. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEF057231101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49b2c8877d272ea816fba4879dbb27a1cc3cea9c289c891502202450bb1733e. 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/DEF057231103.
Requiem: IIb-c. Tuba mirum – Mors stupebit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020a55b93558ee517f19f708376b869a6e711cbcd2c2c2d1c81747b4bd6641d4. 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/DEF057231104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e9b8b0fc8ae02402ad2c66b7273ef8014ca939fd5c185fd982e2dc79b3712b. 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/DEF057231105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf8bb3598e2b2e3f8cc0c4bf1458f31bb41a4a94e870106333fbccc3f40dfc5. 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/DEF057231106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3552474be6bb8a176c8d67814e3455657540147477ebac19085ae2c5e7d9476. 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/DEF057231107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624c7e1d795d660fdcd2231601b4fdb95aab03f86b2b0adeb6757bd681d783e9. 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/DEF057231110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d487a4d8f69a219b250c71cb22e4211ed542a5963a37010dcf99ed26ffd29a. 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/DEF057231111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bf52de9bcacc93edcd48058ab0e782b01f355262402981dd78aa9236e2313a. 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/DEF057231113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc068294f99d7afc99248472c67cb288ce7b355e71669ba4f348fa22be5d46b91. 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/DEF057231114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1c616634cd3cd4872175dd0b93e0644f5762143ef88e5ae78005c0b74511cc. 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/DEF057231101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49b2c8877d272ea816fba4879dbb27a1cc3cea9c289c891502202450bb1733e. 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/DEF057231103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bf52de9bcacc93edcd48058ab0e782b01f355262402981dd78aa9236e2313a. 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/DEF057231113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020a55b93558ee517f19f708376b869a6e711cbcd2c2c2d1c81747b4bd6641d4. 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/DEF057231104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc068294f99d7afc99248472c67cb288ce7b355e71669ba4f348fa22be5d46b91. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DEF057231114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e9b8b0fc8ae02402ad2c66b7273ef8014ca939fd5c185fd982e2dc79b3712b. 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/DEF057231105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf8bb3598e2b2e3f8cc0c4bf1458f31bb41a4a94e870106333fbccc3f40dfc5. 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/DEF057231106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3552474be6bb8a176c8d67814e3455657540147477ebac19085ae2c5e7d9476. 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/DEF057231107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffd9ac53dc5533f62d3cfc65718f6fbc7201a5e4c919667cefa5a6085c3a53b. 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/DEF057501802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624c7e1d795d660fdcd2231601b4fdb95aab03f86b2b0adeb6757bd681d783e9. 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/DEF057231110.
Te Deum, WAB 45: IV. Salvum fac populum tuum, Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35875533d84ed23180bad2c8948213425dd7a5d6bccc429fafd3925ec171a0a. 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/DEF057501804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d487a4d8f69a219b250c71cb22e4211ed542a5963a37010dcf99ed26ffd29a. 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/DEF057231111.
Concerto grosso No. 8 in G Minor, Op. 6/8 "Christmas Concerto": I. Vivace – Grave – II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f72b4d947ebfaac2d44cdd5d860c85bfe5a12ba83c2d0ee4161d0f868aaa0b4. 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/DEF057000852.
Verdi: Macbeth, Don Carlos, Otello, Requiem