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 0xfe704005cd52a1cb952e8aff4e8b29f4251b3c945dcf52d7a83298a9d4c23b0c. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d12d69f-02b0-41a3-bd44-a632ea49aadd.json and https://artists.proofprofile.net/proofs/artist/5d12d69f-02b0-41a3-bd44-a632ea49aadd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb6597dc8be38513d5d2c79165dd2130432b9cc5f2a241c01cc3c28bcc741ee. 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/HKI190831101.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: How is the mighty fall'n I (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ec02aa0bd4e159ca1ec0c7b198fc25d7010fe05b181c64b687d14cf80f66ec. 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/HKI190831103.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: How is the mighty fall'n III (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc95ae1ee05434f4205ad0525ee858e957e40525bb944cc3a37d4086827ea49f. 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/HKI190831108.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: The merciful goodness of the Lord endureth forever (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45576a23c60e2a2d2eefefcf44b8bcd74281d57211b1db8f262c250b57aaaeb3. 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/HKI190831113.
Israel in Egypt, HWV 54: Part II, The Exodus: And the children of Israel sighed (Alto, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c070facad4d35c27083035c79bcd943a23c49c975631cf75afe19f030794c4. 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/HKI190831115.
Israel in Egypt, HWV 54: Part II, The Exodus: They loathed to drink of the river (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf387080a75896f33a529a4bd9e3620c87f3bbb8853e7204f2cc477fad03b0eaf. 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/HKI190831117.
Israel in Egypt, HWV 54: Part II, The Exodus: He spake the word (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9526719c44648ede38419a7e1c5bf017bfd3ae0ae728c511b744778f08ff2735. 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/HKI190831119.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: The sons of Israel do mourn (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c02cbd54e087f559419c618ff7d6a3d1890b558bc44b5837ee2f5138dbf921f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/HKI190831102.
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
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: He put on righteousness (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ad8014cbd5dd758547eceb3d37efa90f93641b90a69581266e0bdb509d7361. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/HKI190831104.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: Quartet: When the ear heard him (Soprano, Alto, Tenor, Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a70f8f38493353511fa9e563acb6d14ad231bb4529261192faac7ad4929abe7. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/HKI190831105.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: How is the mighty fall'n II (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9918c77d083fa59a8c36079ec1557569f4a4ad306d0f62e1b7d7fd94f9eadbd. 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/HKI190831106.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: Duet: He deliver'd the poor that cried (2 Sopranos, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698bf32750ef75beb0e4b6201d96bdcb576511e81e1fd0aa43c78405384d427d. 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/HKI190831107.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: Quartet: The righteous shall be had in everlasting remembrance (Soprano, Alto, Tenor, Bass, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ea720d6b9be1bb1df2a6c68052945cebc4f8f53eab0e151f5748bfbecff7d. 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/HKI190831109.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: Their bodies are buried in peace (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928a9512a545ff08449502e19c5610701047b8581f3ad489b004114ac52360d3. 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/HKI190831110.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: The people will tell of their wisdom (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02084eb3591f1b9b2e05aafe8d74f35b97b9557bd7046ccb18248eb93747e8ed. 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/HKI190831111.
Israel in Egypt, HWV 54: Part I, The Lamentation of the Israelites for the death of Joseph: Quartet: They shall receive a glorious kingdom (Soprano, Alto, Tenor, Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568db662448bc8996178fffe820d1e08b802f33f4f0cdcd9297a845981fb6d72. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HKI190831112.