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 0x23618be3f15a6f3a7a9f9e07ff9e3105a7d5230cc80b4b6797f82ecb45cfc708. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d86829b9-b20c-4e45-9cec-b86bf3909749.json and https://artists.proofprofile.net/proofs/artist/d86829b9-b20c-4e45-9cec-b86bf3909749.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Allegory Of Desire - The Song of Songs in Western and Oriental Traditions
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 0x261169fe5c7e16a23663bdd369f95854ff024f9de366636020ac4839926af245. 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/BEFF41600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae04401df222ea09b1a6797a2223cfad3548dfc1a6cc77e14b0090fd64662fc0. 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/BEFF41600003.
Maugré mon cuer - de ma dolour confortés - Quia amore langueo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb052bb97098ed43c5474ced73d29e1a8e4dc56d1057025009cc5246b4bb75a92. 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/BEFF41600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bc8b181b941990ab0de86c010a247161aa20e8b6cdc379ea8cdca868454403. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/BEFF41600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feedcbf7f104d2eef5ca134ddf2f670400ca0d0e7f322a3e9faff42d77823dd. 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/BEFF41600014.
Hochzeitskantate: "Meine freund ist mein"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5046981171685ad02a384dd27442862cb65b37d192fadcd60b13ced734f05fc0. 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/BEFF41600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f1518b59d69d7e8d3dd651768506f90cb36eb22e3b52392af6a960d5f29ba5. 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/BEW632225703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0734b2fa1f44a0c426dde6721c6cea3c51e03c95e8db3ac7c96ebf28bceefbbf. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/BEK732101301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8b380bbea9190e6d95c24d09b9b668f75b70447b621dbfc1d7965ad42999fe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BEK732101305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef60e7ec0554bd8aa2d449e905c8c5ff196c4c16024a64c147e1cd824d9e2a35. 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/BEY681800054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f2adb8a16d6e5d76d31990103f7c5df929b0c56254c9e89bd56e1d115c8bb5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BEY681800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca4a21664c41897c5bf471816327c66af44851c5d487230b98ae97015043635. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BEY681800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6f315c6a998d97984b87c3a4be47dc2c14d9c4d77bcb7dd459d23e504be518. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BEY681800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc598d3861ec39ebddd870ba534862338c1f8ddba7842fa4b7fc0b0976a12d18a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/BEY681800068.
Tears of Joy. English Lute Songs and Secular Music (VRT Muziek Edition)
Greghesche (A musical treasure of the Venetian renaissance) [VRT Muziek Edition]
De Fragilitate (Piae Cantiones. Hymns from medieval Finland) [VRT Muziek Edition]
Piae Cantiones ecclesiasticae et scholasticae veterum episcoporum: Salve flos et decor - VRT Muziek Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc18de62b1d7ea8fd311d91396dc4f76ce1851e7934f289c0ab324cf6810e72. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BEA032400444.
Piae Cantiones ecclesiasticae et scholasticae veterum episcoporum: Parvulus nobis nascitur - VRT Muziek Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ef3ca24aa7e361ee11048e6ea6e0b3f1324c4fb2fcc94729e8d8792d5ef9ae. 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/BEA032400447.
Piae Cantiones ecclesiasticae et scholasticae veterum episcoporum: Kurja paha syntinen - VRT Muziek Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e39cd00efb555c99b6eb3be124bc25360b31bf3284a9650f0b2ef1d0c04221. 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/BEA032400454.
Piae Cantiones ecclesiasticae et scholasticae veterum episcoporum: In vernali tempore - VRT Muziek Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b714776096fa9ba7aab2741967dcf4ab7097a5fd36ae940317949ccfd2a0a02. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BEA032400462.
Ons is gheboren een uutvercoren - VRT Muziek Edition
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa870aaf60634478ba0f427dcc4789e826ca6f2d9cd7090f006f5ae25f5414ba. 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/BEA032400237.