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 0x53d8a7b7636b0cb79ad5bce9bb2b04a8c0ccdbfa0f4466c97e296d4aff1bebe8. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4a1bba0-e8ca-4c9c-984c-346c658911a4.json and https://artists.proofprofile.net/proofs/artist/d4a1bba0-e8ca-4c9c-984c-346c658911a4.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 0x2db2ae55440b6a30cc367e2abc7431f7fb065786bed45f1a7e0d5674772defbe. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UK2Y21308208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712551b49a07d5ef5fe948cb2596a1528028e6a35dac2054329da3fd3d531fda. 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/UK2Y21308225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30668ebbc556d446a9d0009f74460db32a55366b054e25dc6204e4dbd4298ecc. 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/UK2Y21308226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa82ce1344fb0d82e6bca01ed61b3759dda636512ff3e03ff13e3a342115d02. 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/UK2Y21308227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcaa8a157eb27c991270e67c9533eedb65e06e30aa7f127579e5ba1ec10f95f. 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/UK2Y21308230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e38f0bed9f77efdd30c04cc259bd7ae9a3c18e2b2071f1368695b32a006c050. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/UK2Y21308215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04858843dac845d10d6ea1a3e979f72e76cd8204773e5768493e9418650d6e5. 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/UK2Y21308217.
Образцовый оркестр военно-морского флота СССР
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4427015cd2e1aedf67011712114fdf606a6a0c8c3a9e05a77190cb6a63c9fe11. 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/UK2Y21312210.
Центральный концертный Образцовый оркестр Военно-морского флота России им. Н. А. Римского-Корсакова
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11fc6f31d7d071b38897415ebce964b99f5886839697b933cc06e7684fb6162. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/UK2Y21308330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c1d52ece2168cab63e955484b13827cb263b30e88a819c360354da6986b7ff. 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/UK2Y21308331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f83095223f228e47a1586a0076b154276041dd40ceea5c689e4c44574958fe. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/UK2Y21308332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e779b21e560e85ad57b27306e97ca77ff8159a2ec635770196b8b55e6012446. 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/UK2Y21308335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6352ad2725273bb429021d235ef3f61b6730cb70eb9f558cb89ea9798495f0da. 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/UK2Y21308336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2741325d735a8bc18222f772c68c676a95bc75559f7250a216ca13cd692e0225. 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/UK2Y21308337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7df20b927ac28928d101324f138c6dd5e855b180d68f0d43b9a033b9da749d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/UK2Y21308340.