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 0x60f533b5fa7721290ec0ba2d9d31b60f8ca4a3231ed3b8f5cb07c4bf902bdacc. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/984eadac-d130-4eb4-ab74-4582b9ad1470.json and https://artists.proofprofile.net/proofs/artist/984eadac-d130-4eb4-ab74-4582b9ad1470.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xa585dd9b28308f8378d6c102923d00ddeb8d9fa20ae2d298428622d3418298b5. 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/HKI190420401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4899d0ae41c80d566970a432d31f29e717734708625abd15373e6c9ca398590b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HKI190420402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c13ef038b7423f204568136b64b09d8465ca538abe5d9178bd2f5d5365ff22. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKI190420403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491693c474040fb53a4b2905dff3cceeb88347a5a4167f4f32f1f5f6f15c79f7. 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/HKI190420404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814adda1c4224c228bd7f87a0f036ed11e6a82de8daba7488031d0bb111b7982. 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/HKI190420405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882cf3138710857c16b55cb6588205e3849403111d12371192f78aa2fb714e5d. 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/HKI190420406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40907bfde7bf1e6581a894ec92e7d4b5ba0bf39ac9b53ea7653071989fe1966f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/HKI190420407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1abb4222a5bba3f784c545fef51f4c1d69bca08aaa8ee7482ff6d104f95a56a. 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/HKI190420408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17b67deb8bd030de29b582348b661dbc4ad105b32b998eadd1618d1f593b38a. 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/HKI190420409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea06ccead76f9e23cca8ca060321dee111cc5570c9110c67b8571449588733d4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190420410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fccb3757e1bbce94ea1d6d85c1d84525e7d829d5b02d079835099aa4469b78. 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/HKI190420411.
Praise to the Lord, the Almighty, the King of creation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd308487f2c96ec118bf1514f44a5a5846323e292da3848c8af5f5ec442b7efe8. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/HKI190420412.
Jerusalem: And did those feet in ancient time (Jerusalem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab4b2a9724205c91291ef41352cbe73cba2a1ec94d3d4dec72cf740f801c9f7. 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/HKI190420413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9718542a16f09205c08a3b650caabe9c5ebb261d93ec81d26bee38b07183b53c. 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/HKI190420414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b59530de9fe810251e65972a41ac56efbe02ed10840496888df74aacff06ac. 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/HKI190420415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317f64d526d292bbfaa1fcc139c2dd715075e8e84a6b042ccbba0a7f670ef591. 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/HKI190420416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41feb4bc2a7d408eaf806ee53a466a1e455a9074e2dffb46453df64c6b7781a4. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKI190420417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fd60787aba71ff7b812f069a050c4ce32388cd72752ab57ca5691f3154b2e1. 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/HKI190420418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea901500eb147446dbb8603cfb8b9aba12c433d25dbec84c01bc18093240db8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190420419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297992f532a76a9a78f355ce8a32544a21c0ca0a4fb2d807ee22657bf9b3ce9d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190420420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79058d79af8442a6a9e6f7305c7954418f953b539e211fb840095d7eb6264825. 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/HKI190420421.
The Choir of St George's Chapel, Windsor Castle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4899d0ae41c80d566970a432d31f29e717734708625abd15373e6c9ca398590b. 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/HKI190420402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882cf3138710857c16b55cb6588205e3849403111d12371192f78aa2fb714e5d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190420406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40907bfde7bf1e6581a894ec92e7d4b5ba0bf39ac9b53ea7653071989fe1966f. 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/HKI190420407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fccb3757e1bbce94ea1d6d85c1d84525e7d829d5b02d079835099aa4469b78. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HKI190420411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41feb4bc2a7d408eaf806ee53a466a1e455a9074e2dffb46453df64c6b7781a4. 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/HKI190420417.