thumb|right|220px|Portrait of Lowell Mason Lowell Mason (January 8, 1792 – August 11, 1872) was an American music director and banker who was a leading figure in 19th-century American church music. Lo
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 0x89925ae5fd1e78f627e9b5fd5d8025f1a55d8813e45eb704cbe152f7eec5e662. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/988d6c26-615b-4b7b-8726-47afbbaa5af9.json and https://artists.proofprofile.net/proofs/artist/988d6c26-615b-4b7b-8726-47afbbaa5af9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nearer, My God, to Thee (Arr. J.L. Stevens)
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 0xe0bf5f07831f87edf538be5e7191cb948a0f778d99d99de621de49e7c7891989. 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/QMRB31400068.
Nearer, My God, to Thee (Live, arr. cello quartet)
Nearer, My God, to Thee - Live, arr. cello quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e719d6037ac4e3c62290f5def47f368c1c0025a11a0a1cb60a3d689d93adf7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWU2061972.
Nearer, My God, to Thee (Christian Piano Variation Worship)
Nearer, My God, to Thee - Piano Version, Pt. 7
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a78fbed74f0b43d259942b0b2206a6a6321c49b52a9028f8477daba736afbc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEPD42122507.
Nearer, My God, to Thee - Piano Version, Pt. 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc057cd291118e14f57dafb42a4f8f0ae225f27092d85edc304f61d85d434ffd3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPD42122509.
When I Fall in Love - Nearer My God to Thee (Arr. Johnson)
A Company of Voices: Conspirare in Concert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b8843be672184a0bb594f16c1fa4c914187214890956a1d984db04e054fd9c. 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/USHM10853412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6faab34b59828c2f6d80a27500d1a5b721714df70e7a559f2c60a40d4683ff. 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/USA4N1301376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499b55ca76b152f6f11acd992e5e2cf445ad8b9d857a3bf2927dceecc7d15012. 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/GBXUX0870507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6faab34b59828c2f6d80a27500d1a5b721714df70e7a559f2c60a40d4683ff. 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/USA4N1301376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500b53cca137302840ad995f633116a5758d10895ce9055785fee1196abcc749. 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/GBGRH1100105.
Naher, mein Gott, zu Dir (arr. G. Meyer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9706eb16d6eedade20f1db9f26a8d69f0573d3bb93484f47b914ecb7f02d0892. 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/DET900813010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b43f3eadab7e914700fd44569121d71ff1f8228199fd14fe10303e358bc0f0. 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/GB7WZ2055512.
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
Nearer My God to Thee (From "Titanic" Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4c731924aaa3ca8f4b7e557cbf89ccb069f4b7d4d63aff21d7725894c78928. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USSM19803266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390345e81273eabd437fa421d10307a9b24c9433702e4ee1a398d4e12ed65fab. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA4N1301279.
Life Up Your Voice: Hymns of Charles Wesley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70298267182f1a3c77b2276cc2d3b0baea8846d8be863186f3490e26d7bfcf8. 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/USKC61519617.
When I Survey the Wondrous Cross (Arr. G. Martin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a2e26835a0b624950c148b37cb1f2654520a503e4309d72443f1cd062b009e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USHM81065577.