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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2957bcc480284ac4f499d15dab9b419905f25c31923e040fd75367aae5d8c35. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff9272a6-9f82-4f26-9dd6-b0088cfe702c.json and https://artists.proofprofile.net/proofs/artist/ff9272a6-9f82-4f26-9dd6-b0088cfe702c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef49446f0bd005d811b7fb13605250e6c56e1d743d287d5519235641e327cda. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/RUB521205466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93022c90500d8d890b3101a27e2dbc8e38b18ef09c6e244ee7feaaeeba58c517. 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/GB2LD1900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd378b34a171940e1592464396927f062396dc0a18e14d016b35660f01486503d. 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/NLQ8D2000276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8d22a8d5c9ecd389b680f7570614be9f49204da5557a4297fb2d941476bf46. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:49Z), 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/RUB422002526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c6ba1348a1539c402a0b92df95b3e0ef4491f13d8c21763e8b252258827241. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUB422100117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc382c4601a29ed6d1bd294dcfa6011356162beb0be0ea7dd31c1e3fc573dd7. 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/RUB422102156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ef8747c16451d09e8e72f87b5614f66b5e94736b447f54778935f703744092. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/UKEX32139204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7594fbbacfa2a5f5a60f9f59c6577f19198d34399a7a9ff78a6a58b1d5dedef6. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:41:49Z), 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/RUB422103813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca5ced3cc3b4445cb68ffa62f8d2de50dbc05c80a768e085193dec8208adf23. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLT2H2100966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60b25544ca44872338612d152e2ad6005ac638ce39b8410302a7f6e6c74b1e0. 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/RUB422201692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a72ad16d39f85a9a3993bf323d8f6e381c195f28caad8eb7715133c4c91a53. 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/NLT2H2200555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50098e4333046e0660ed8047b030b1fbc34dcf7c7de6ee110e2880ed98669cd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLT2H2200714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be57ae2af0ae5ff17e47046bdea9a293cb61ae1ae2e6543e8fee8508407c879. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFME2209675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9a9aef24a375b12c76d65e681e7176ffcaac8cc7e0817c4ef32152d157b3c5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:33:28Z), 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/RUB422500753.
Apple Juice (feat. Carla Monroe) - Denis First Remix
Apple Juice (feat. Carla Monroe) [Remixes]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee509753663a5b852235ec4e6cb36565651fe0bedb8cd64ff2df031352668100. 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/USAT21812362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851ef5a58517b9f0e02e7bbdc742e815b2d7ab1b185373709565b6c613019460. 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/USRC11903673.
Finest Hour (feat. Abir) - Denis First & Reznikov Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7087cdd825c0bf7b9ca6ca7e4a527522969f56fa91334ffdc5f7f4c45748587a. 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/USAT21802758.
U&U (feat. Tim North) - Denis First Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8650afbd64793c4a9f609fe660cfe575975ea389b97cc9461d1aa4511f99d09. 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/ITUM72200590.
Hands Up (feat. DNCE) - Denis First & Reznikov Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e374d1800bd92021fec5980a5ab42d915b60795d2c066148d9513cb3b15a4c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITUM71800797.
Panic Room - Denis First & Reznikov Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8910b9714353e26bbfb20223e2432c3886bcd72c0123b08d5b05cafbc17ea8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBARL1800719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8910b9714353e26bbfb20223e2432c3886bcd72c0123b08d5b05cafbc17ea8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBARL1800719.
Heaven Ain't Calling - Denis First Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43300eb4fcbebbe39124bd0a8a9ab843eafd58827c72361e0fdc4b122452a19b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:59:52Z), 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/CBD282310010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce434037510e2ee178ec5779599fc376542d9a70269ef938b46fe450075e4ad1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BX3IW2000001.
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 0x06c591fa1e22a82411319584f3225cc33e1b59df09a877386540f1a21c26d685. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DGA062074100.