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 0xda8eee6e0fc294b92de656c6a4223cf142b4e28f8aa1fb3f4809a140c9af4e9b. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20b8d5c2-f85d-43b8-b99a-d8f1e97b1867.json and https://artists.proofprofile.net/proofs/artist/20b8d5c2-f85d-43b8-b99a-d8f1e97b1867.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 0x337396d4fc71fb3c68763cd9180861eb02d5d0e8d6107eebcd7efa80cabf8a4b. 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/QZ2K31700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ffdd85eac9b047682d652065907a2c3829027d9d409fd0460b44553dd8ca3f. 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/US4R31500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4c543c8d85175c72997b97be90d9cd0efee9aa0ea0e6bcd75d8a3abe9da998. 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/USRC19807337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba40a883b95b94a976ae0b85fc25686a775e56c99052fac2426b19583c6b5e2. 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/USRC19807340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d93744b72502e642249850859a3591b94acb84c92aa65f782b02988ca39251. 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/USRC19807339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf073341c44395c37123964bd5eb954982085e66aa7e11c493ced807540ee0dd2. 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/USRC19807338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edabb5cfddf996d1d4418600d39240bb955f0067b42d220f56b305a0ed22318. 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/USRC19807346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bd022529811aee0f72bcc8afba11a145af4b2c3b8dba2a6ffaf72dd1f3c1e1. 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/USRC19807342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3afe5aa304610ae98ed0aec6cf2db44571c384b1db99ad71907715209020656. 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/USRC19807341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24c7fcc3b49e4f6e7034fb8980a0bef9c9f1f93d109fe4e255fd8ea58d42d51. 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/USRC19807344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a383cbe9fc8d628cc89b603a57de83593df6af087862d9e35a37390493c394e. 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/USRC19807343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc264815741c44016eb64dbc6e6b9e949ed8b8e975f6276a488e0833454024c78. 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/USRC19807347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73571976a577ae477d5c1252f67eed962d0018e6356a8cd3f56a7cfcdc9bb5ea. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USRC19807348.
Very Live at Ronnie Scott's London Set Number 1
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