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 0xa195d484d3ee29cdea9bbe138424c787effa52938499603a67490001fd1465f0. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f1111f2-1b1e-460d-9df5-7204ab7e1839.json and https://artists.proofprofile.net/proofs/artist/5f1111f2-1b1e-460d-9df5-7204ab7e1839.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x2f9d9b456731d225e2fb3d07ca6a39702cf7cecc0bb3b60de878fdcc60fef485. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USUW61050001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a92a8479360a240cf1c505467d6b820719e2d0ca320e000302d212c614022b. 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/USUW61050002.
Adeste fideles (O Come All Ye Faithful) (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec058c57baca93530b97541decd4d9e0dcb102a06675401b1f89cb41912e9b1c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUW61050003.
It Came upon a Midnight Clear (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157e2c3f661eadf9b55182963a0770a1e970033828acf51bf4230072425ed770. 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/USUW61050004.
O Little Town of Bethlehem (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa131a60f4a8e7fd5b0b3b6612174bd2770ad1b93d18c9b40137e625ca62d7e. 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/USUW61050005.
Silent Night (arr. A. Delmoni): Stille Nacht (Silent Night) (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c8f02fb116a81d6fb8cf1cdfe4ca008e8552564c5223aa524d6aa2d3ab7425. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USUW61050006.
Angels, from the Realms of Glory (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646dae588ad647616f9406e6746b94731fb56091c0f9cfba5a1cb51f5c9c8874. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USUW61050007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd255a7eb12565061bf064eea3cb24f421ed8206ef2eae79ae12801202fc79f7d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USUW61050008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe188e7592e42451d1c29115a541177442000cf163680ff04bcf8f86540de8378. 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/USUW61050009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55ca07d8b5718b96327a5f6ebac7b40a723481d80102e1c1cf832cc17caff41. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USUW61050010.
Es ist ein Ros entsprungen (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b104e2efbe83d8be65b427d6089e820c7767454453d4d2d2105a4dd7c3f413. 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/USUW61050011.
Angels We Have Heard on High (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17809bcc08e9546a08f51ee650a09e65dd22568fc3591150efdfed33ceb507ed. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USUW61050012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffbee25e763534b8f3d6d34cd3766f546baba76f4b5b19291fa34e6a9213dbe. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USUW61050013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f393ce07bc4493d38d932292377f58b1bd792af45eaf1f98c046f6a0929640. 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/USUW61050014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaab125c88240cc1fa5938e6573d8f74d31705673a3938d90f443c923c79b2f1. 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/USUW61050015.
Bring a Torch, Jeanette Isabella (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b0d40ef2f4080022f46cbd2def5e7571c0d07715b6888299cfd8b841eebc27. 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/USUW61050016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7340bc61e3b8537275336d9dcb6061d7d92e04e2a41350aa8d4dda155233bc. 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/USUW61050017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebf87a68d7f1fed9a98701621624155c54637f8a64cab92df77ee4847108df8. 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/USUW61050018.
God Rest Ye Merry Gentlemen (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339f75f35f7cebff0e1d9561cfdbbc7776a053262d3dd577544571ed93f987f0. 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/USUW61050019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688b1e6deb1a5ace091a8110eef2de9144d36912d639f08ecf083b21fbfe3dc8. 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/USUW61050020.