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 0xf951854bbfe8d664b71f71fc865727b7b1529ef3443c0d8dbe441c67767e4500. 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/64cee5ab-0a68-4cb1-9a39-64b6bb246a84.json and https://artists.proofprofile.net/proofs/artist/64cee5ab-0a68-4cb1-9a39-64b6bb246a84.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 0x0cd040ff76b6f8a6cde03dade3f74a7658a21327b1f8f3eb9441ebc4aa1423af. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM4TX1714240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef8c48d87c9eaf4ccfe76a2853da76d26adff77400233f582266742ba031db2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM4TX1731124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de0eab95a1994cf7d5c246f46e835454114fbd32d0c3c22d83ff27126e353a3. 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/QM4TX1731129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a5bb53bf07ac6e4f3b3957a324ed9122ee1c0df9de3dc106458239e4a96dba. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6P41817081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af2948d7aa6307831f6eb710abaaf1496db07b65e039485b0785242f8eb5e76. 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/QM4TW1837304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020632161963266c4fee268167375a8d39972c26aff106a2866d7960ad85a878. 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/QM6P41817085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcba1b2dfcc0f2c4752e2a70e438efd930ca383617f4ccdb8fb0672697303627. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM6P41817087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf829a289fb7dc318ef50c386da600f8c8ed83dcc7c2a337ef70f61507d664e22. 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/QM6P41817088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfc4656c13ae164981c941f8f5207d6263eb3f606ea4183b397e9180269fa6c. 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/QM6MZ1953303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aa657da5985d8f5b817ac382f42e405cc70cac3e556db2e71e95c7092c0ec6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM6N21941372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85294a02b465ea85baeb75ed728ee6c365dc181fe3e67a1a74caa337d0b3e25. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM6N21941373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d443d1a5a0fc9ef565744171c454e3ce3ee44be80dc0a11718c52d6770b27a. 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/QM4TX2070292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c95edc2d9a91eebd084a0c410e102cf71e9d68c219326ef2728e456b95cec0. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QM4TX2123944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d47eb6fa787fc59d0884cf3d38e710781a62b9af0b7a23acce5d86f62c1705. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM6N22139100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6734e59bafb05adc32954d5f34237ce555f515795304b2f269ec001cef02fe57. 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/QMDA62110771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17993f448307f374b7e144c584a6ded919c65ad9714125e29890e332ecd8529b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QMDA62189028.
Благовест: From Фандорин.Азазель (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c692cb0ed60903b0e851aeb47dea8e071012bf926226f11198f51e72b0a9aa. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/RUB422302867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4618a0bedafee385961470634c711993f214569cbe2066b39489aaca30c650f9. 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/RUB422400478.