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 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 0x9657ab099284391b40d0951df0072f4a933749a8b10d4c816355b8d93186c626. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fd36063-0ae7-42d3-8e14-543b15836a6b.json and https://artists.proofprofile.net/proofs/artist/0fd36063-0ae7-42d3-8e14-543b15836a6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Freezing (Arr. D'Angelo for Voice, Piano, Guitar and Bass)
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 0x684b3247d0b992c39025a766fccecac5a2ef715663353394565b08c34f4212ad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEN962434101.
O Love Is Teasing (Arr. D'Angelo & Helstroffer for Voice and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efc80daca7ea5500ff68be4bd17fd58e3754a856d997543a7ba6f9044fdebf2. 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/DEN962434102.
Quietly Waiting (Arr. D'Angelo & Helstroffer & Kramer for Voice and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5629495c84099e9b3663a3363186d1f17c3ef98f249bcd7e6ea53585d23ac3. 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/DEN962434103.
Wonder Boy (Arr. D'Angelo & Helstroffer for Voice and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90a6f88577afa8a12bfcaec7c7689028c531e751e2a9aab01d79f7bb0287774. 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/DEN962434105.
Lullabies: Snow (Arr. D'Angelo & Niederstadt for Voice, Piano and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2709de60f23f1ffe8a738707635848bfa2dcc2213d53dad51c5a74381b5486e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEN962434106.
Cold Blows the Wind (Arr. D'Angelo for Voice, Synth and Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbefac816e518fcc2e72735bb7e416956c5b09658806c31fe9c916dcd957b742. 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/DEN962434107.
Lullabies: Silver (Arr. D'Angelo & Niederstadt for Voice, Piano and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b8b787688288419de27572d0f1be3fddc7f2e4ae2addc52dfb41ae4b37cab0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEN962434108.
O Solitude My Sweetest Choice, Z. 406 (Arr. Helstroffer for Voice and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad29b45231ecbb7870a387c755d7824d2a4f255a22ffbd7797da0c6c729e0c14. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEN962434109.
In Darkness Let Me Dwell (Arr. Helstroffer for Voice and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe50478e88784e3276804eb57834ba5f3a3a1631a967cb916b435cae48ab5e3. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEN962434110.
Grounded: Night Drive (Arr. D'Angelo for Voice, Piano, Guitar and Double Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb21f0b815c68703ca5cecbcf67384dabca4e32867bdf6c7c14de5059ff8fa7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEN962434111.
Evening Song (Arr. D'Angelo & Muñoz for Voice and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5517e4d161d51669ccaa506507f995f668d6e8714bb1f90303370d57ece79622. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEN962434112.
Morning Star (Transcr. Muñoz for Voice and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90878be021c30cad0cfdcc99b07b309104a66d5082b7ad590a2d451e71ffedcb. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/DEN962434113.
Wandering Boy (Arr. Muñoz for Voice and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749710a2582d2be4f69213386284003deea52ce21d2809ad331255a9fa09e5b6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEN962434114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff3bd4669c5164257a0b072e53b5fade444d551931ec010c7c77f8e05d02f43. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEN962434115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75318198a7e3bc1479ceb3c0486b2b23104c6ce8866d7e10948f4e6bcec3e4af. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEN962434116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f01b7aec9e3d8fb78259adf11fddb2447e5232800db3b9b2e509cc16e20af7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEN962434117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d7ddf9547232eb7d44a3ea726e26ecd9cbf9076ff4c90a50b4fbb2c548b42d. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEN962434118.
Sonata for trumpet, 2 violins & continuo: Grave allegro
Purcell's Trumpets : From Shore to Shore...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee62f1d6e375135e3309032da6e04dc3aa56c7e8e2e3e93930e4a283de3e9af9. 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/FRZ170800400.