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 0x27860e778f05496c324c6be6c8b91561cefc20885e44589fbceb2e32fbf17fb9. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bd918a8-407d-481d-816b-7cad0c361c51.json and https://artists.proofprofile.net/proofs/artist/6bd918a8-407d-481d-816b-7cad0c361c51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
12 Madrigali per cantare e sonare: No. 8, O dolcezze amarissime d'Amore
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 0x0ab2f7182258080109595408c7a012bf6dcfd18e5133a5e2bbca526e33e11203. 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/BER182245502.
12 Madrigali per cantare e sonare: No. 9, Troppo ben può
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3259e61ac150304e1c2cb035ce55c1dbc210fa2873dd4423d5df0b8e7c4a9eb. 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/BER182245508.
12 Madrigali per cantare e sonare: No. 11, Non sa che sia dolore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c43705d09e96545de74b7712c2370f7445dc944806ab610d59b02ffa779c89. 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/BER182245511.
12 Madrigali per cantare e sonare: No. 2, O Primavera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b875e401aaf9856722404ce199be261f5a7ee3344fd892e4486661f0a25dea2. 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/BER182245513.
12 Madrigali per cantare e sonare: No. 10, T’amo mia vita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28644ecbebf5359e32f9519316ac855f79440d7b8e948b2e911a28a6e44c131d. 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/BER182245501.
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
12 Madrigali per cantare e sonare: No. 4, Stral pugente d'Amore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f384a115883d018d4458f0aa4fc02155750f4a8f1fcdfeba8275353bc22220. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BER182245503.
12 Madrigali per cantare e sonare: No. 1, Aura soave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f22e294fcacc4a41813e2c91450021f0ff956c03288fd63eec4c974c911746. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BER182245504.
Madrigali e canzonette a due, e tre, voci: No. 10, Come dolce hoggi l’auretta, SV 173
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc555a61a63f271e2f5951531aabd365d4e19d74fa8c47e5dffdfcabfaf7f21dc. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BER182245505.
La liberazzione di Ruggiero dall'isola di Alicina: Le tre sirene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e664af5b86590b1142c181cda573fa558e23520ed5b5e30651c53448287636. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/BER182245506.
12 Madrigali per cantare e sonare: No. 6, Cor mio deh non languire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8967ba9b436c9d1ba95c80cd43e1b48953231664f631fb1fc026aafa0c90d99. 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/BER182245509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2019ddb4d9a60019da4ba33ecea845536e885ed326e3b98f1c27826cb2baa746. 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/BER182245512.
La liberazzione di Ruggiero dall'isola di Alicina: Le tre damigelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8137f3fb14aa7153f78c976612c83369ffba0894262b8ff31d5712abbafd670b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BER182245514.
12 Madrigali per cantare e sonare: No. 12, Occhi del pianto moi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f649eeff106feebe6634134ac332ab9d6c2e7c7b77a3b13e7822dd8831319be. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BER182245516.
Dido and Aeneas, Z. 626, Act I, The Palace: Ah! Belinda, I Am Press'd with Torment (Dido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9323a46331627ca9fcd8c62f925d4a730287007f830658689147ddf817ca4e70. 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/FROV62129604.
Dido and Aeneas, Z. 626, Act I, The Palace: See, Your Royal Guest Appears (Belinda, Æneas, Dido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9683c35dba0259640cda7c4ec594e9205a91a8583280ba2382c7d218f44bf1e. 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/FROV62129609.
Dido and Aeneas, Z. 626, Act I, The Palace: Grief Increases by Concealing (Belinda, Dido)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885046e21154fda4254c3abde15ff800887393a840ebda9a0cfc07da7de87f8b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FROV62129605.
Dido and Aeneas, Z. 626, Act I, The Palace: Whence Could so Much Virtue Spring? (Dido, Belinda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57927eb6c1273421f79f84f5a6e27227c00c4df04d0f599c0554da81d7a7321b. 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/FROV62129607.
Dido and Aeneas, Z. 626, Act III Scene 2: Your Counsel All Is Urg'd in Vain (Dido, Belinda, Æneas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e8dcb4095295def6b3682c41861f15d7edd196d7245bb2dc11c5c8e4f3dafa. 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/FROV62129632.