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 0xd71880351d9a35df16455a6c003f5974a41f95cc261355a3581d17048d9bbd2f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23a30306-b9d6-4f1d-a383-0e070aed1fbe.json and https://artists.proofprofile.net/proofs/artist/23a30306-b9d6-4f1d-a383-0e070aed1fbe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rejoice: Sacred Choral Music Through The Ages
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 0xe97dbb73a2530784f96f2edd9b41f69c33de07b29d5b03376217273c0ed2a806. 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/AUAB00850955.
A Ceremony of Carols, Op. 28: 8. In Freezing Winter Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d7f0613722941e00fedcadcdeb2cf751febf1731b7d92d1f7aee74def67c7a. 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/AUAB00750888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e43b013ca5eec24fde0df62e535712908d170b74a2e933c2bcfd440c6651c4. 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/AUAB01250538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9dbbf2d8100f14047d8ec011889e42981a763c866bd0c1afc427ac68df7fba. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUAB00450090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3bca36408a1eea0eeaf1a743b1122cc337a93141fb336dafcded5286372070. 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/AUAB00450087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58527574e520e177b21a5b63d3006a8f02b04e02ce0d68f4476275eee6fbb99a. 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/AUAB00450088.
Three Latin Motets, Op. 38: 2. Coelos ascendit hodie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1175eb0d0b578b3fe5f968203d021ab1d02c2c72f9620229e4d674f97f9e004e. 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/AUAB00250060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3874d8125a9bc50d9ccd5c3f7a5a4193600247e4a79669b2f43bb939f000e9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUAB01250153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a181b04e68f7943478ad8686164b99138b6a079d2ca54436744483add87212. 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/AUAB01250540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ecc51feb46b0212e2ed4fe67628db2918deaf8926643b2dbd28b25d4403ff. 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/AUAB00850970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4554621286c5828e0c2a4534c2b90fd3818b9844dcacce840a238b747a977b86. 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/AUAB01250150.
Praise to the Lord, the Almighty, the King of Creation (Arr. Christopher Willcock)
Abide with Me: A Treasury of Classic Hymns
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40a119db89a0edb05e6794e205d7c0f68b1f5d0abda3411ec936cacc52be43f. 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/AUAB00650476.
I Vow to Thee, My Country (Arr. Michael Leighton Jones)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e89d066909c089ba3eb4ea938d95a8b568d7455d868ef329b1bd63c948fbf31. 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/AUAB00650477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863f767df6207bc96b745c2d06e2a6956e33605fae4d77b372297ce0e68080cc. 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/AUAB00650478.
Be Thou My Vision (Arr. Christopher Willcock)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277ccc9c527ad9277f1fd5b6d73287abd81a2d00fafed455d6026aee34c27160. 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/AUAB00650479.
Lord of Earth and All Creation (Arr. Michael Leighton Jones and Christopher Gower)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f1299fca5e099520501957d2fd1132927b7686d0c5851ceab2bf70137b380e. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/AUAB00650480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9bfa5648cbd8eae550949d4664cccc519cf548c24b4dfc6f8d6bd8d5a4fb83. 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/AUAB00650481.
Holy Father, God of Might (Arr. Philip Nicholls)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb80ec8a9f53f1c9fef7bebaa1e3d026383df3a9ee6225d4dbd333d56d2a8f2. 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/AUAB00650483.
All My Hope on God Is Founded (Arr. John Rutter and Michael Leighton Jones)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1b91297da9f0bc53f324bbdce51786dc19174d6df9fe10e0281017d78d63fe. 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/AUAB00650484.
Glory Be to Jesus (Arr. Michael Leighton Jones)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da96ef2b3cb28dc13639dd84b0c10244206da2430fcb9e386bf74f09f31cda9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/AUAB00650482.
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
Lest We Forget: The Music of Remembrance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4318ec3bd477574cdd8c8d01d904af7ecbd3263928f8446f5ce5bcafb13a904. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUAB01250151.