The Choir of Salisbury Cathedral exists to sing services in Salisbury Cathedral, Wiltshire, England, and has probably been in existence since the consecration of the cathedral in 1258. The choir compr
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 0x4fb7ea93af3ac61909c2b88f1b13bb16227cde983aacaa78f72ec709d6b78ca9. 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/8e109604-a58a-491a-a638-4fed5cb4b0c4.json and https://artists.proofprofile.net/proofs/artist/8e109604-a58a-491a-a638-4fed5cb4b0c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Psalm 20 "The Lord Hear Thee in the Day of Trouble"
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 0x1e95cde84b298969c5642160bb480053174b5fb254f598b3289ff20402369b6c. 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/GBXUX1105801.
Psalm 24 "The Earth Is the Lord's, and All That Therein Is"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360cb3b2c55bf47affbc6e62b8428d61f1a2c13a6fece532774154252cb0205d. 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/GBXUX1105805.
Psalm 34 "I Will Always Give Thanks unto the Lord"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb042ce8fc87d30d72a9b13c398c7336c0c54f5ada42a5d098e03b4299eb3b6e2. 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/GBXUX1105815.
Psalm 36 "My Heart Showeth Me the Wickedness of the Ungodly"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2a82c388994ce666fa354cf798642c469a60b6239c92581a16c2eefd27b2ce. 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/GBXUX1105817.
Psalm 21 "The King Shall Rejoice in Thy Strength, O Lord"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc86b7eb1e746dfaf6a1ec04feb25da68e42cd2d9340efd25b0165f5d9ff6f9. 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/GBXUX1105802.
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 0x704516825a987bae23ba12237de2316ad83f25d6d802876e62f99c80568ba535. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBXUX1105803.
Psalm 25 "Unto Thee, O Lord, Will I Lift Up My Soul"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7625c602127f15db942c3c06599573f12bf23cabfbf0313bf2f0e0e447496ca9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBXUX1105806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1d00c65952f465220b70817fc9132b00637e0e81cd3ba6f5d932162ab20796. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBXUX1105807.
Psalm 27 "The Lord Is My Light and My Salvation"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe988366d856bb9a14088581fec3039e12cf81c95f262857cb0d18339407b5b0e. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GBXUX1105808.
Psalm 28 "Unto Thee Will I Cry, O Lord, My Strength"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e008840ba782dde0bef5666eaee197400bd05d4ab2b86226a961b46a999bdaa. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBXUX1105809.
Psalm 29 "Ascribe unto the Lord, O Ye Mighty"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80e926d9e5c5b3e5af7f8c388d06f5de65db86cbdefc93ac6f8fb6da79a90c8. 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/GBXUX1105810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f8551eafd3e796c74d9ca072b5a7ec7c280e93a4e9500445beeb86f00f9a9a. 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/GBXUX1105811.
Psalm 32 "Blessed Is He Whose Unrighteousness Is Forgiven"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc166c71b31b58a0ee6dc0ab8b6df7335539baacdb60845d1d6d14fe7018028c4. 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/GBXUX1105813.
Psalm 33 "Rejoice in the Lord, O Ye Righteous"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe441a721ce08d5d040c672491228f2b9e943c0099db2d32ab515c3d6f2c4172e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBXUX1105814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf23bb6a72145c6c7c3da96f54808ed4c25371567408a963842748747af8def. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBXUX1105816.