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 0xd3d06920e4ed7d977d98be816a79efd6e0635aee1aa5edfb8b0d01406af8335e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18d12387-b9b7-4bea-96b2-08b95f0c19f0.json and https://artists.proofprofile.net/proofs/artist/18d12387-b9b7-4bea-96b2-08b95f0c19f0.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 0xda22036925050211d42f1c23a7966a20baed4ec3bd90ee8a68c92ed80bb2cc89. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITA980605265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd205116f9321a730e8b00bd86246d9cb481e0f1c56c7e8bb903a1dded5a19de5. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ITA980605267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a3678492de20bca8c81dc312f37b77e3664c0b13650ce503ea69a29a0f1d34. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITA980605274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e58b82b51db4d6fe01c302945e660df3c375e423c75fd7336690998605ade1. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/ITA980803088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9638d29f9b759fbf3c29ee76eab8501d8ede6044340ab329126adc26db598f0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITA980803090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe787311842f785ea2a7ce330441804414ce489218b116b171db3508f273d9989. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITA980803091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6743b7fd04c604166ef4fc08215914ebe9c4c9f455970866d37fed6c791ddbd4. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/ITA980803096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cbe2689ac0ab05f38e66510524c8d17af9f18186cdc05ae68a9db189b81a8c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITK601802489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb563989ecf793ccb6d794cc8591d41b09661a758f42c327ebe3f7b0180ec87. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITK601802490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1015c8fbe4ad7c4dc4291ee88d1bdb3a306ff59a2787f9a7a1a6561ee681e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITK601802494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb721523a2cf644a1f5ba0192c8a114efd86f17d61e7bde9815accd934fa468b5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ITK601802498.
Swing with Sting (Live at The Blue Note Milano)
Arthur's Theme (The Best That You Can Do)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116c38ad2e9230200478ee2ea6ad751cad131bdc2f3b8ca793adecf957ad3016. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ITK602200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0234c11ab428893d2c5737caa1873db02470dda3026019491a891cb9b16f773e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/ITK602200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a3f753f0ee82095c4b5f0bdb67c7ef897f0c54bcd769ec34d1eb16547fd08f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITK602200256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ae8b2f4944de29dd939b6960c94ddb6d2d308086dac63a423a1df3ef41b75e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITK602200259.
Live at The Blue Note Milan (20th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077bfefe293c48306ca000570656a05ac62af7321244c8a73b2800cab902dbe0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITK602300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5e1e6812859f24eb874a1b6eff8ad4a0c78f39d9914ed5c382ce5a41362245. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/ITK602300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe651b27e97796ffeb9c8eb8454c6cb4bc85afd474220ec0f3bee32555f047d76. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ITK602300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a82ef6d89476a6b67229cd50b9845ab58d5c7464f56040c8e6bb9572c2693f8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITK602300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92017070f121548c6e9c545e2e3a5fda29941da2177d9b21e64517d3da5270d6. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ITK602300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69eb8477d71a733f9927b616e785dc9bb73c82c656520a0b9091eb21399abc4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ITK602300008.
Raindrops Keep Falling on My Head - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb21e51b87c2eed0e38e9de32698f7c45238176e225647a4f38fa18dcc9762d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITK602300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05e6d8580fac440323f1e9bb67cd2edda97c776e166f3249373c8353f641527. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITK602300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c93b279f9088f0114543fe35f0e96fad61ad8338899c7dfe5165987e57e480. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITK602300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca75ba4b7419bf54b9602f628d8d40a65d948d8ee8d4c5cc7c7615570d384311. 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/ITB001300141.
Acid Jazz Classics, Vol. 4 (The Finest Club Jazz Tracks From the 90's Till Now)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdeca138908da341b1987be2a14b986b508d6ab15a96543fdcd382cad9d3ae4. 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/ITI021400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f5adb87d10b945ecbaf872ecc1e2d8686a8c4c9620315cda21cff1dc225ce7. 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/FR2X41400882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdeca138908da341b1987be2a14b986b508d6ab15a96543fdcd382cad9d3ae4. 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/ITI021400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5c6101ae1712d88e0ecec0102d6275580ea2ef1c4875e217534d6d4655cbfe. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USHM81557736.