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 0x16d500e0e3eedce352b9184061e9d014b2dc3413d2f0ab04a479a227ab569910. 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/e5ff80cc-360c-494d-9943-c89f8fb37a7e.json and https://artists.proofprofile.net/proofs/artist/e5ff80cc-360c-494d-9943-c89f8fb37a7e.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 0x4e2ba1c60c7f99a5d33147f7c1e03e33303c817b85c2e47bc4f157d8cc2e0ed6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FR96X2183387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bd9eb024aec684ddde4803c9c4b45116f1fe068c618dc361e0d381e1679831. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FR96X2183391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4dfbf2c74102d72687817a71394f0e14e033ff6c6cb0b6915b5da5f7d903e0. 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/FR10S2273178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc1127faabcaa0db2e6d0fd1762128fadf96bf9c9cf823d45af098fb9d7637. 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/FRX202213803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf728aa3aba5f686153e31b4d407ef3908d37022e8248926ce410b123f283cc2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:43:07Z), 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/FRX202273005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ccef4389b8acc2d8ec11b6cbb4700e0eb1fbfb2814da5ac158d9c422dcf3c0. 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/FRX282243566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33607ffe92be3aebf4c20a4dbac03be978c9d707aa406d70c3c1f3987d12210. 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/FR59R2307603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6789bda5c044161c070297086662974ec52858ad4def5bd99990ab568b325088. 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/FR59R2307604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc197da41bf6cd72006714aac8052f9f73c80d21c14c3cbc56ca7553ebde11. 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/DGA092355079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74f75bd5ba1fa9a6b63e4733cb422d453f952f76790091cb07fe659474ac2ef. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:50Z), 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/DGA0Q2380350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921bc56cbf452d8b81dcac94fec64c3a7e3f186cb22b2c888a43d200d5ac2b11. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR2X42448717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4433695547afa6bddd5dffafe9eb6c26de5d15b9a6f9f26e0f7345ce4b2aa24. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:49:43Z), 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/FRX762490130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d7da7f2d97b657b3fdb03a7b71cc40d6cd7c5e67b7a20e9f286217dbd974a. 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/RUAGV2409500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34d94ac4675fe1b0f3036513698d06ae195521db37b11e5ea939042fb72949. 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/RUAGV2503095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac2617fb6fbbc712a26995b710628f53dc7572274da7f383ce9335a1add410. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUAGV2503096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c82047a4357d9440b75f10a6dae871f986dcc6e63de19bae782488dba7c9318. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUAGV2504736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b65f451b52a13180a7e0c55bd135801f63c9d89d8d5c9d564234d357c1a1ab. 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/RUAGV2509559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083a9f523ea523de6d53cc3f2665d66f152ac281930ca432070125b3aaa7c681. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUAGV2509560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe44f50ad868ed969d2bec69d3472fa447ce8100e54b0ffaee77cebaa43b15e5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUAGV2505387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf10ad63d8c94ea81afcf9ad537db86dd3e177436545b9dd42e1890372ad0356. 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/RUAGV2517767.
Вернуться в Россию — стихами / Return to Russia — but in verse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ee53aaaef304b5bcd7dc7d3cd0d25750b649507d6cde26457dea12646a8551. 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/QZW9N2259734.