Hertfordshire Chorus, formed in 1970, is one of the leading large choirs in England with over 130 members from across the county of Hertfordshire, London and the surrounding areas, performing across t
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 0x1eab4ba9130c73f6c18381052f3cfe4b157029a28d97b1eb253bac5e0806108c. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15a50519-3b83-4873-9c4a-c9012fce33ee.json and https://artists.proofprofile.net/proofs/artist/15a50519-3b83-4873-9c4a-c9012fce33ee.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Karl Jenkins: The Armed Man (Ensemble Version)
The Armed Man (Ensemble Version): I. The Armed Man
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 0x3b7318a3cf8d315ed0af6e0466def1fb70fa8aa7990a565b120cb65de4008e11. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477901 — a six-check JSON result.
The Armed Man (Ensemble Version): II. Call to Prayers (Adhaan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6622c15a8ad8e24595a97b18b684d692591c93b0f1b6f2c0fe1e0015995be17a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477915 — a six-check JSON result.
The Armed Man (Ensemble Version): III. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988a86d9ceb8e730d93d2181e685bdf672fa0d1b27c3da717a1165a1f3d239f9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477903 — a six-check JSON result.
The Armed Man (Ensemble Version): IV. Save Me from Bloody Men
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645a9fc39f306be88ba637cf9c66123fbc2c0a120429df410c0a517ad1289b77. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477917 — a six-check JSON result.
The Armed Man (Ensemble Version): V. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d4041a2e5731cb0f9dc986cae4715e512a6736a1af8f9d30848c01189aac73. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477918 — a six-check JSON result.
The Armed Man (Ensemble Version): VI. Hymn Before Action
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cd68ebce4c281f15c711031a2b6f0a60a193a5dc65b1929bad20ef64bedbd3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477906 — a six-check JSON result.
The Armed Man (Ensemble Version): VII. Charge!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c399eb195aff469ff378ed39ec2305744d7ab82848f847baf2d66daf032394. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477907 — a six-check JSON result.
The Armed Man (Ensemble Version): VIII. Angry Flames
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b80e66e44d73c3b171c9cb73c4e278fb679bf4d4da5d17d631794448595528c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477908 — a six-check JSON result.
The Armed Man (Ensemble Version): IX. Torches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27fa560a5e1e0a08b5e6527a890b9a4bec8f27ba02e04ac476c5101c4ee0f7c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477909 — a six-check JSON result.
The Armed Man (Ensemble Version): X. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5f0302f9b6379476a5e489d44cefb7628d6d79ee376837c2758bea79d6ad12. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477910 — a six-check JSON result.
The Armed Man (Ensemble Version): XI. Now the Guns Have Stopped
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa12c7736b4380539435a99ae9e793f1cd3ac5ba28c5115ae947f42a053f3b3. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477911 — a six-check JSON result.
The Armed Man (Ensemble Version): XII. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e0277f60b5c0aa6219430c7a8ecce092513d8851a3f0bcb8b4147136880210. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477912 — a six-check JSON result.
The Armed Man (Ensemble Version): XIII. Better is Peace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf52871284b9d2d42f5c95ffc4ff31ac9eb81f8e67d0301d926651159c58d46b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477913 — a six-check JSON result.
The Armed Man (Ensemble Version): Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e0277f60b5c0aa6219430c7a8ecce092513d8851a3f0bcb8b4147136880210. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLLH2477912 — a six-check JSON result.