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 0xd06be6cf161cf90904d00d956dc575f0b65e96175564e968ad4eb8c15fc4ae67. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8c2dccc-c427-4b6d-b754-52fb528c18a9.json and https://artists.proofprofile.net/proofs/artist/b8c2dccc-c427-4b6d-b754-52fb528c18a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sérénade angélique souviens-toi Nathalie
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 0x2149507991f8d993b69e0efbe649491c857a49b0e152bea2e5634612f8897d55. 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/FR4DZ1200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78acf915c269108eee320b91ad9e30f8381cfa45e67b64b34c48ee495a001c5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR4DZ1200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4130ada368f32b4500926826e85c5ecb2f4c27be92f2545c8aba72c1068b915b. 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/FR4DZ1200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b23bca19cc60f3bba010ce40384d6b89b2c9edbdf12da37edcb627d823683d7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR4DZ1200240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63699c00e237c81119d42f0644fa2a76c7b73de9f61cafd02b2479f44e3b0e14. 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/FR4DZ1200250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c5f54bc7c6d6de9920e5ca4929d6f8f74358d6751a2eef0fe5bb14e2b443ee. 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/FR4DZ1200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a02bcd4431b5a893253587f0ed68b661033f80b42d3a0b72030679944446b0. 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/FR4DZ1200350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a896e24ab6b2686a56a83334df30f97845a42b90177be4a58fe6996124b0a6f. 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/FR4DZ1200220.
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 0xcd6e136c062aaa73da66f17f1fecd0be24464bc0b45f258d5459b30ff370041a. 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/FR4DZ1200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7479c62bd4a093768ac6bb2256631ce8bacc04832a0fa5664a7304528e02a7d1. 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/FR4DZ1200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782a0ece0654cdccc542a8b11bc6c08109e675d9292cd0724ba9f512951789cf. 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/FR4DZ1200280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fab05a3beb74c637837dd9f798e1962734a774aa1603b0d6b16da42951a515. 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/FR4DZ1200290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cdd8fb94415088c7bbffa3c2072752ed2eaecef83c4a23959d30143884177a. 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/FR4DZ1200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b4a5b403818918b9ea84169b1677341220825221f9daf204e8bc47973ad84c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR4DZ1200320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26a28d249d0d43185b4b1210cd6645c4cd0901f7f19f930965fa189da3cade2. 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/FR4DZ1200330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1162be40dbb193c5f1695774a04dcef7c2965402a75df2c9bd9da7fb59ae26. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR4DZ1200340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6c23917ae2ae6852c2a8a1f857cf10886a5a82cb970dd95a047958b99ffb1a. 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/FR4DZ1200000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749ede05553825e5be3be71a85a188541139f4eedc0dc5d6e7652b7ab5746adf. 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/FR4DZ1200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc130510822351b9f57f6605cfe1aee2dc66d55c4833bf4ba5eaa7806aed7a1e4. 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/FR4DZ1002600.