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 0x17d748d19d4538dd8eae1839c2148b34cb9a4fbf992dcf96daa0fd5c4c2a6565. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55f3720c-bda4-42e0-a770-ff4c40ba11b5.json and https://artists.proofprofile.net/proofs/artist/55f3720c-bda4-42e0-a770-ff4c40ba11b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St. Matthew Passion / Part 1: Recitative: "When Jesus had completed all..."
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 0x5ad5f05ffaea6ac755434d0f4cdf689cd4c71b6aea05d194cf21b709fff2ec87. 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/GBF077843501.
St. Matthew Passion / Part 1: Chorus: "O blessed Jesu.."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4456eed93df84459d4ef768b3ab1a9b18f357e316bde43bce4096e194cee93. 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/GBF077843502.
St. Matthew Passion / Part 1: Recitative:"Now when Jesus was in Bethany"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1037a468a33331993442eedeb02c347afbe5c69efccea88bbf11ed5c0659f4. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBF077843505.
St. Matthew Passion / Part 1: Chorus: "To what purpose is this waste"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ce519d0c2b4b7daeda518687d714c4f7308b1868be13b210af5ea64b40d497. 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/GBF077843506.
St. Matthew Passion / Part 1: Recitative: "He answered them and said"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5344ebccaee666cd1f70252250c53604c359253dcceef5ba53745bb0744ee6f0. 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/GBF077843515.
St. Matthew Passion / Part 1: Aria: "Jesus, Saviour, I am thine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a544a80a033a76b030fa23141f0d8bf0d6a35294faec36e8d9747b1f8b90c39. 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/GBF077843517.
St. Matthew Passion, BWV 244 - Rev. Elgar, Atkins / Pt. One: Chorus: "Come, ye Daughters, Share my Mourning"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008fcc275e49182bf97f5af7c7da0e8bead675a07cc895104ee80891cbeb65ee. 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/GBF077841901.
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
St. Matthew Passion / Part 1: Recitative: " When Jesus understood it"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8635491c7b04ae6c0c7cb8fc1491beb811fe0e126941ae0c31f1e658cc88fdbf. 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/GBF077843507.
St. Matthew Passion / Part 1: Recitative: "My Master and my Lord"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe533f1869a6b43f8665edfb0667a45afd8903d6b7dbef8c8275a9cdd22bd7d1. 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/GBF077843508.
St. Matthew Passion / Part 1: Aria: "Grief for sin"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3be01fbb3017256425a4c5f1e88558788aac3bf7590027a031b519e0abd8f56. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBF077843509.
St. Matthew Passion / Part 1: Recitative: "Then went one of the disciples"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0ee6a5c106e5a33c64e4039d984397770ff6499e7836c3cc464e49f8910b58. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBF077843510.
St. Matthew Passion, BWV 244 - Rev. Elgar, Atkins / Pt. One: Aria: "Break in grief"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e7211c0f12a9dd03409a9a90e4fc99c36958ec5735f7bb7cfcc993c87202fe. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBF077841902.
St. Matthew Passion / Part 1: Recit/Chorus: "He said, Go to one in the city yonder"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2001f8cdd9e9d5eb67de67ea7d77457a0a051dd33e89e2595a6a0ee86f3f45. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBF077843513.
St. Matthew Passion / Part 1: Chorus: "Tis I, whose sins have bound thee..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b9898428fa2de53231d03e83f166e7b3ff64f3dbba5da59fb5c77b69f7fd26. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBF077843514.
St. Matthew Passion / Part 1: Recitative: "Although our eyes with tears o'erflow"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff548e8935d3cce273475d5ea78b2c9353c22d551bc093ca8e1aa883953badb. 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/GBF077843516.
St. Matthew Passion / Part 1: Recit: "And after they had sung a hymn together"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e0c8992682c540c463753e4388d8172fbecfe751a850bd36b7492d6386015. 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/GBF077843518.