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 0xa4c73451e0b431d19a0d8265b056b3200cf9e89e055aaf645db7723981244679. 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/5a9043b2-d267-47f3-9f00-ac9e9a67c9b2.json and https://artists.proofprofile.net/proofs/artist/5a9043b2-d267-47f3-9f00-ac9e9a67c9b2.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 0xdfb6791ca4df92e9101c23fb5727dc3476a9b46de3892a5ee966ee6f705abd1c. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FRX872001977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60857f659756c59d4622fe05cad0e1b6d18e6b15f9440854f94be1d819e3beca. 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/FRX872001981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc620ed880ff4aefb9dd98a6bc8f94fce8ff643f6c20ed7a6ee98115a4beb8500. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRX872001985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f2cb11b7f1c0bc2b61ea8eac59d095a61f5fe6449336ee477290428ac8ef0. 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/FRX872001987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4570cf16cfe5293979cf10f861c1b5521b9781e0ecf2ac16ce2bdc90813e0987. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX872001995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937f3be0b1db4672fce6103e8220f5c450a87997b0bf98d3f61f70568135c1a8. 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/FRX872001999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38377f575c8bd431d0299ceb11c67ab45e0534399e1e5abffacc5cbde11ee5a3. 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/FRX872002005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607d781fec2cc6456e158bc93e985388f633224c26ccf02987a1cea4cd7582d7. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FRX872002011.
Так почему сегодня нам не спеть (Вершина)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123f6804ab78759ec9f825187d232f70d77abce4ea12623009eabdfc9873f2c9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FRX872002015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8595f01d344a1c1aa21b8ef3b4f9df5fde81cd59995014700e184c24d0c81b46. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FRX872002016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dc3bdd4f8f4d47a6fa252c2db019898725e630ae2fbffaf4914772d6d30db9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FRX872002017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac70449b7ed09c48558cf34ff7990771599b7809dc2d1dd9ab350c56bdf125a4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FRX872002041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcdbc2bc938e76d917200dc502d453dea2f984f0ab4b4defa812a27b68e65b5. 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/FRX872002049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac259feaa559f5547b9ebc18d049b71d9140a131740b750af3bc72af93cff326. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FRX872002254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac067dbd498e992737adf5e6b450203a69d3381ba2de83b54fe11367dcf7792. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX872005797.