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 0xa0d0028b9cd6d8a4cbeba9bc4c77c737f99a1d88d7f0675b20f265e2724caee5. 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/e78c6a13-4cdc-421a-b1d3-8ae378a3dff5.json and https://artists.proofprofile.net/proofs/artist/e78c6a13-4cdc-421a-b1d3-8ae378a3dff5.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 0x4e22a2decce5b160275edd2a8ba18aba3abcdb8516fed921c45620136dea966d. 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/FR2X41633968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3251a397d9b45eff4a82c1c66819317c32948f9c6dbd96dc583f7a9d709354f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR2X41633970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57f3315ae6e4a07b124d4d2e4cb20c4b546add69a49def03ff16f81bb895814. 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/FR2X41633975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7afe3209418807fcc82844e1a12b6a58f36f5943ad7ce8b088156755b322ca. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X41633977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe9e3811897e0db075530da9b7b4786ab81c26bbc4b162fce87cdaac24cda4d. 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/FR2X41633983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d5cb77e5d599b575ff9ca1bad758b1def08f80a352f0177bb9480e968bede6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR2X41633984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4ec7d3b2492fdf40f593e9cdcf314b749bdc5f0cab7b7fb58dca7ed52b64b5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR2X41633985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e2ad8a37c29c206acccb2456c2cf1c7e9b3318e80e8429bd0db5a966225842. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR2X41633986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9ce88d4aece103b7ffafcfc3356c97cb037b2e2945a86d78f6b6aeb506dfed. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FR2X41634014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51076eff65d6baede0ba75cfe968dbaa2893fb10308b21786e5100b91b2bbf6a. 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/FR2X41629806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd89fdc2d25ddef42d83adbf96a72b65584ba8e5cd65528b130b06d43691ee52. 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/FR2X41629808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf525ae3c81af934e759eda70adffcc0955375585b561a11b0fbec2482fa05d72. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR2X41629815.
Когда ты вернёшься (feat. Белая гвардия)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af1e6026c31b17900820131a81eb1968e383412342dea0a8bfc08c5a2d861ee. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/FR2X41781503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351da6b7062c5304e1946a26bd3112aacf9db742d94a477d1654173d36f0d14b. 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/FR2X41781487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfde86a0d8fb79a9cc7a881f0f87fac304b4b98d00fba9c9dcd138507316c13. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR2X41781506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a5430626ba3a1516ea2705eeaf4ecf140ae3b286b06da88ce4314e2e3bcf42. 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/FR2X41781520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02488de011e3e3be7f5842edf7d99dd373a36cb3e125f47db756d4b239083d0c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR2X41980281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3202b6c16afdedfa80a42cf7de6f7a34c21a1808e6c560a853fc27f23b5910af. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX452083627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e530e7cfde141cce75045773c752caea825e75cdab36fc48ea1612424ea414. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/FR10S2256491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5c72bc6c9e7a2ff3e04275a8a89fc08a2c353b7e7ec0f0cf1029ca06eedbc7. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DGA092378412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae7551bbdf0d42fb54e3fe89a352787e62ea89e333c8beb82f411c242afd076. 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/DGA092378416.