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 0x4d9c201a99091089ce4366830ad3a0481c2117038f1eae094bcf1eea5fabd36d. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d649578c-fd3b-49a0-8fc0-e147e9744385.json and https://artists.proofprofile.net/proofs/artist/d649578c-fd3b-49a0-8fc0-e147e9744385.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Italian Jazz, Vol. 1 (Le 50 migliori tracce)
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 0xe90e331976ee040388b8af05d15287ba404fac8f0e13523cedd18c65a5595001. 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/FR6V81271872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc78a11b6571960e13220f0ce0c886cc1a1362cf53ae0d2af0bc816050bb3fcd. 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/FR6V81271895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb4ed5443516317a7371db97a90149b228605f450098d22fe43bfc6a17f763. 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/FR6V81271907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fda062fcaf8ea718d23de315734d88071e5d88c503ed61317e4d7fd605794b8. 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/IT7D82400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac9ee417aa735074d7b3efbcc8f8e0302fcc08df8f538a0ce5f0e6fe769f45b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IT7D82400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041cf719a44dd6e881dce17e300b0ba4d7ce2b9e53d3173440ee6e7863bba920. 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/IT7D82400302.
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 0xed51e5a7f4b9b48ee089e7f62bed43e6381c197d074e3e0bd9f345583b896b28. 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/ITZ392027401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25836f9e193dff76a9356cd7f106bb6ae3ec555ba767b8588ecbcc8c546bc4a0. 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/ITZ392027402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a18cdb6ea5433dbc1cf4fe3e97669b270f4f7b0c5302a9b555abc3b01be522. 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/ITZ392027403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0c593e063bc34384501e177b856bd009dc4112f7bb33587c46e11c45a42a33. 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/ITZ392027406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ef0b4503b2a0491538ae737dadf84ceea0fe41c151ce7ced583cd94a026bdc. 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/ITZ392027404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeba2bffb48054887f9df127ba6fe0e6d88718b04dbb73899b0ba2ad63999c31. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITZ392027405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450d5dba0a9b8f4413d84eaa0d403ef60a43178e378b39abdc9f1e0e32b23a7e. 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/QZNWV2474464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7675848683a8ce856da597dcf88be0f42409926ed1b175713e6f29be4936f232. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNWV2474491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0584983ff6eb4d59aaf1110a2f28c37993829ded7d29fb9ec96b99c31139eb4b. 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/QZNWV2474492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358da4869d6e22d95fb4fb30d5d2bdd58564f8ec1c26d0f0fc3e6eb80f9d6c9b. 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/QZNWV2474497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6a92cfe3395a8f693a91ef4342d0c660993ec02ba399a4abec70d5cf88ae4d. 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/QZNWV2474498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493a6da3924b484018c43b812830423f4b525e416ac450d6178c9c286ac0f098. 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/QZNWV2474493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d78415580606fdd4ad6e75422a0a811b40336aaa32b37c4757569882cf6d2b2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWV2474494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8825b7bd84de8cc850f40941fb0bfc9d1b9fc5cef56986a90763c6e187f48854. 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/QZNWV2474495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a6290560b9e2a1d6fc210abc354a564046fb69f8904117f034d77bdf86a4d9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNWV2474496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f0d99b9839b7fc4968a2fd0c7a340e36993e6ad00c7f8b4d36f85d106cdad2. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZNWV2474499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b381834ff852d41a214a7f61b307693ac8009f9054c965d6cdbda979ef0d808. 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/FR6V81262971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363df69ca27e0de92e2e030968092d7d0f5841b576f3719be21a56a7b031bb1b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR6V81262977.