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 0x0a58e90ab267ff71fe91488dd0284edf2bec0c1d593812ea9a471d8e6270e43b. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55990674-3ba7-4986-bb9c-7604fbe1fee2.json and https://artists.proofprofile.net/proofs/artist/55990674-3ba7-4986-bb9c-7604fbe1fee2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chiaccona (Music for Lute and Chitarrone)
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 0xf6bc71a8d717849e41723f52efc9d79710d5bdff05829698a750e7f4add572a4. 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/DEAC60406003.
Caldara: Motetti a due e tre voci, Op. 4
Telemann and the Leipzig Opera: Popular Arias from the Collection Musicalische Ruskammer
Krieger, J.: Neue Musicalische Ergetzligkeit / Plectrum Musicum (Love Songs and Arias)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2edf28d1eb2ee0c12a4b373770d07fddd104e602100f7a2403b85a69a5422eb. 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/DEAC61103002.
Dolci Sospiri: Dolci sospiri - Passacalle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1feac43c20c00f7a1fc9981640cf53086d5874a5805ed90c24fbdfad205564. 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/DEAC61103006.
Dolci Sospiri: Non più d'amore – Se ben rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e90f3bc5c88ccc071aee490a6d7e3c1541fa57e4bdf47abb4aa5ee7894db8f6. 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/DEAC61103007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f5d851fa600633e66545304542a81880bbb2e52379fc6eaed250d19816bb68. 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/DEAC61103023.
Dolci Sospiri: Folias echa para mi Señora Doña Tarolilla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142ff551b945032c7e72a30529a214a7c5f3acecb28d8f7a567fdbdbf2ea632b. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/DEAC61103001.
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
Dolci Sospiri: Canciona dicha la preciosa, echa para Don Enrico Butler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5688e9e41d1ae2bf345a20b45f909634a8b0fa90d562b7e19373a16238215c19. 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/DEAC61103004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebacae98f174ea38e7a8c925f4d870b8448cb24b1bcb265e5618db467b54e02. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEAC61103005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d135acda0a0e45e5f643663f4c6745ba1ab6221e65d22d10779b505a26a9a62. 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/DEAC61103009.
Dolci Sospiri: La Suave Melodia y Su Corrente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2353ee30088162b9a3b5e09b830f7052d3461f2bb4064f82c227498f84b5dd8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEAC61103011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7b8890f6b42cd94f07ac764aad1298428d5c18133375787ce3e7d23acbc5bc. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEAC61103012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e7cd10a4077ee5944c914633cdc6ff78ea87597a9e61a26ac6033d7ea45e4f. 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/DEAC61103014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ee7c5dbb4005d3c2a4b7a40c41b8f03fb99c603f9c7af8171ed02e3d3f594f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEAC61103016.
Fiesta Española (Flamenco and Spanish music of the 16th and 17th Centuries)