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 0xd7757916fc124a5d07a5c79e4f1581b507edec759276b69d1e04fdaf0a11a3a2. 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/1f5c9bad-127d-4e45-9d0d-55f4998d99a2.json and https://artists.proofprofile.net/proofs/artist/1f5c9bad-127d-4e45-9d0d-55f4998d99a2.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 0xf6d911ddf01a148769f82f1773af937437fbdc29d90719f31f54eba68c6383dd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USLZJ1936892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b89c183b52b20153a8c4f2967305cb009e9b521b32cb5cee16631477db3c4. 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/USLZJ1936913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76548b3413f063cfac998c68000585d963794fdc9994361bc419c503dd1b13b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SMRUS0065058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76548b3413f063cfac998c68000585d963794fdc9994361bc419c503dd1b13b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SMRUS0065058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cc2be6fa2f768d2aa48d742eeb61333944f2fd1234413d917a1412d6aec54c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SMRUS0072061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd892cea189b89ba092d760aea5a4c1f01d2dc54567ae79f409a733eaa26223ed. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX872250480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668f49184e9a1dcaefdedc408bef68bb2f6193daf00d3ff1050f87f325df99a1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FRX452294057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5286977f2f12f0fe146f4cbfce1045e940634add7f8860b52f96a3082409c90d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DGA052231943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33b2b79b874677d254e99ac78a620db4113c648d79cc3eaf61b7591f0d967fc. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DGA052231944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ced67bf644689e94fc8cdf9453ba5ca7b812232ec5e4b4955826fc685fd674c. 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/DGA052231945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a8108dc4cc9698ef80c05c1701f07b09d3d85c29fd84639da75feb9dd9f408. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/DGA052231951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba9fb5d190ec59de8909ddf156d898e3aedaf58d8068dbc5f18460158d242de. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DGA082202221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa2ba2d92d7a7e4df945e567ffb9d7d73aa2b2a86106472a4023b077fe4c2b4. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FR10S2336298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6c92033ee2a266ae28faf6da92c8a2765449e99064450fd6799a6ddab9bc72. 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/FRX282309472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d3a26ebbc7aad435183ee23613aafd92c1685e77bf7ccc55047cca04f23edb. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/RUB422302679.
Танцуй (prod. by BROWNIE, MATER, SUN’TIL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9484899fb01a688c9c909bcf55395c467f469402ec0211fe64dbb0121bd1d2. 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/RUB422303217.
Изысканный (prod. by BROWNIE, MATER, SUN’TIL, Экси)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be43abc7308af25fe1bd184ea383143dfe0841a31868edb10455cd1b8db4564. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/RUB422303225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e191c9ca0efed99933e211b0e8eb1ca687228c517e489be9af42fcdf1b15c4. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/RUB422303227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410722aa1b46428f9bf1487f9bf13317723a530ab350857bdc5bafc6a7721b93. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR2X42483207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d56683d052f531de99b8e7ab6be3419cb62f58f372ef72f44aeec30c1661f7c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR59R2458263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0b6e913bb7cad141c80104962f510f9d7d1a3a9e92e423906b54f406586e0a. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/FRX202486543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22366d787941f7a2ce7664a79202ae2e148c3cf0f0268854ba81125bfbbd4a29. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FRX872491273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ae34bc1e371f51cf7cfaf4044f18242e565979d8313f115b3e96c07c3ed764. 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/RUAGV2406722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6aac7b7ba08a4465d3dfd57f411b415b5dce9b89d30093f469b8518195c741c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DGA0S2440308.