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 0x5d34c499b07240f4af64026af06c2e8f72bfd6932608d2618077809e7b80e7da. 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/6a73a3fb-7ad3-49f8-9f8c-ba3b219e5854.json and https://artists.proofprofile.net/proofs/artist/6a73a3fb-7ad3-49f8-9f8c-ba3b219e5854.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 0x6fbe3aaeae3ccebddde9e10860e2e49d5cdf35ce1e28350b58be9e6e22a9f4a5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM4TX1936142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381e1401d92efeeb929b77a63a9c849d227cba44616ec651185a33626308750a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/US4EM0610026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4707c1a116006a1e946498264a4c5d05fee52cef5acfe1657e7a11b903f4c95. 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/US4EM0610031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058491c90945c5a1510ea2f52e982ec73112b39c68f0787bd5a7c22292194ddb. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US4EM0610032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b944a68169adbb9d62e8d2ab6e2c15f70ea543b0d39f63e5247a51595bd17de. 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/US4EM0610034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a4cb4d0f924bf97e383347a2a5775671b89db8be95e0de5dbe8a7608eb7e6e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US4EM0610036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d39ac343d9bc4a6993fde88132789e71e70bf7cd05b53a4de28138a83588db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USASN1602579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba12cb86d8a1dc02d87eeb76353533f0406609f2d46228cbda4e049034fb0ba. 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/USASN1602582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d22fccc3380277c3da80f007bb858a2025eccecb65808f71a91e542db2c823d. 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/USASN1602585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b714d8ba0825411d8ddbf44e1606b18f9ba78a45e47c45bb024e34e8f535b5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USASN1602587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf213fcafcd54eed6f150803342268e30e5a29eb3435418ca0679f3700237f349. 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/USASN1602563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3542f6a307f87cc9b479155185c2a64bfe42862788100d077e3877d394bb200. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USASN1602564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff071e9c762b993077bcc80b75cb55843155a7c5c69fdda7277a43b1ee53040. 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/USASN1602566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62f613bbd06cfaaf311e6e60596e1d6710ea9962384554ca1825f2a20666410. 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/USASN1602569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc005e8de1095546b1cad3ece837bd99acb3b785e08b14a1a9fe92f9b3f55b8b1. 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/USASN1602571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd03fd730107daa461798d90530e426cce99529118ea75564512a126bfc71e7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USASN1602573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2e3296f60c83ee185ccf483341dd72feba1b4eb75fd057fad7575e552e5159. 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/USASN1602576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b17ef4603629f3d6aa90fedd5782025926f8824d1c51666c84d953c470abe8. 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/TCAFL2133098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51018367e55353dc536d66e35fd5728ad3041faf6cb1f235ccc5d04008d9d76e. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCAFL2133130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d74904bc44e5bf6a9aa8bf7b597e5c607b3b6af50acf41765a4f006f3fc98c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAFL2145833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d16990fd87486043974fbe9f4313485c6584207db60c8dc2427a87a0cd8de1. 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/TCAFL2145840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa630c116537ea3219e32a3de4736b0cc8ab2763010435a9bd43e4147fecaeae. 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/TCAFL2145845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df3d21a650cea7d1f2203d4ab6364c700bfcbff534a2cdad66a4a272231dbea. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAFL2145849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9982534aefbeb66210875fbaf9f12e34be0ccb1e6e3ce5a2219feded3f5745a2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFL2145853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778ee319b1bf2693108dd0ad512cb0f96c24e1e52a79c859a89fc45587a99f6e. 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/TCAFL2145876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19fa61f235bf680be7c5d287d58ba092eb2561abc639e2ba5a301216dfd11f1. 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/QM4TW2226487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e71a50ab3db87c5ddce53f15627389eaecc5203eeb4d223813f42e08eb31bd8. 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/QM4TX2235582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfdb00b66b5cc5bd0ef8460a37f0fc491375c92eec80feb4b6cadf87288bddc. 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/QM7282361600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9856bb91b2454c656d4e841f51543ccf41788e38dcf3b57e731c72c1671a44cb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QM6MZ2405490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0e1212c924f71c98d2b1fe9b964c6f82b6fa18fde352ca9ff4cb9643680826. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QM6N22487055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8c496d441ff6dafec01dc1b803ff80af3d3644f048b371a72ff6439717c0c9. 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/USDNB0545304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd483baae94d5d5eff718b95c5777fd98b2473f54b65cab1d395cc6462ae12530. 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/QMFME2323476.