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 0x7c5ce6f7888a86ce83730ed9aefa2fae25210c78c741a0822c112760b730b586. 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/5ff3db81-249b-43a8-a2d1-a191ba1b60a7.json and https://artists.proofprofile.net/proofs/artist/5ff3db81-249b-43a8-a2d1-a191ba1b60a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Oxford Book of Easy Flexible Anthems
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 0x1624c3533fb8ec19914b53f5cc1e423f266267f5d6f07479c94429e59d18aa8d. 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/GBN3Q1601088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd603e5355a624d58f4ddd107cc4d5f9a542cefe5e2d48a36669d5d8869a298bb. 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/GBN3Q1601097.
Take up your cross, the Saviour said - SATB
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4477f58143389b9682e96a052f4c800c2859395a3dcef6c8761c5e8b50338cdd. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/GBN3Q1601108.
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
All Creatures of Our God & King: Hymns of Faith & Praise
A Thanksgiving of American Folk Hymns (Remastered 20th Anniversary Edition)
Shout with Glory: Hymns, Spirituals & Folk Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35fa2d6f58263b1926dbeb47e3095244c5982832ace74c90a33affc91ee4f23. 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/USRUF0910371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81c06663300b84bef8cfed2ccaef84554a0b495857c6f5c0f68f34a787e3ce5. 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/USRUF0910372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3c6efc6c1ae5fd4deef52eabccaa72cf79a4733eacff473eb62a4d21220de7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRUF0910373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e25c991727ef23be40714d015f668cd978a5e2ac68ba97728a018030da94f4. 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/USRUF0910374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e0665410bfb356173ed98ceb11c65f9e641c71b77b735601542a7939d8f08a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USRUF0910375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47b88bd4ac666e85d64e2220121916a1c6697ff272e762dc8425ea35b4ba35c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USRUF0910376.
Herz und Mund und Tat und Leben, BWV 147: Chorale. Jesu, Joy of Man's Desiring
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f05737a51bf035dd961ac2f03d8dd5d671b4cb5db5ee1666585e07bc6a1958. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USRUF0910377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d96437d82e3f3ea1591d83e83809a165895a78b4a2ec995331c4ae44cdd27a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USRUF0910378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0404059df6ec57297c26208b7e184c0a0567a8a0ddffad4924edd4baf2e4aad3. 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/USRUF0910379.
Lord, Make Me an Instrument of Thy Peace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee4106ccde8cf282ab65a71f437deb6af4430b0adb05d8b0379e68ed7a94ea8. 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/USRUF0910380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a714cb8034bd384bd9f6094e3e6e4980f43b6e233fb2f10d5dda101afa46af. 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/USRUF0910381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9427a7bb6d53c9f38ce3fb7b70b9a8418845a71e54f050c1d6c9430334e45fc5. 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/USRUF0910382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf3635c23a6fb6517226ca0e70428ab2b28affecfddae31f6bf26f29a7c46f9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USRUF0910383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd028be757daf24efa609d1062d9ad06389595b42cacdd4b039e24f45d0fbcb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USRUF0910384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ecdc1a9e9add8d534d9e008b24bef499ff3cf4b28b6a5f0c72b0dd4549e5d3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMRB31400062.