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 0x040a63cee31adb3e493a446c9dc8de20ff4522e52cfa929d4c8bd42fad2e2ea8. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/decff540-7dcf-4b0b-9755-f452933242f5.json and https://artists.proofprofile.net/proofs/artist/decff540-7dcf-4b0b-9755-f452933242f5.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 0xa9d0fcad2ff3326aa74f2920a7bd4712c3846d32884d0d63862987a3ed54b7e5. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBR5R1300544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1113c2110e35cd5c112192653b37152816d5c02dff98cf437ddfce3d7fa88b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZHN82294162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd682418c5339b62897b1834e9b00b8c2881c3bd8fe273222611c967fd43db1ad. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZMHK2370230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f5272104825b5a640ecc863aeba5074649ba2286472824e35eafa132879365. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US83Z2236269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6327dda8247281f73f751ff4d10ccd17e3aea3dea11c3e6e47c792ddc074558e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR85U2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05578d06b9b35bdfc5e91efcc083570afab7ed481150e0481cbd74497e73fcfc. 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/GRVI11404129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0086cbd77d8b80493e98ff042d70744b5219d1d20e5e2bbbb07195b6017f7d4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBKQU2303754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780e92e46d4145fb1f1bd97e2aa32080e742a607dcc7ff9ee6d75133b5347624. 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/US83Z2123920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6bfa676abdd3e0ff8bb76591f4859c67d387efef9a332f66ba150d8047edfa. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US83Z1780981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d924a2446e03e568dd1eeef67f9706baf7902facc2b45804e2ca3b8f2215df. 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/UKLVE2201342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf371be8bff85f42f073929c700e1aa1e5fe3a12b29ab1eef2504b16427418. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/UKBJZ2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38b83bab758055ca41e2e9c07f3741685b6f029797bbfa4bf874358b2ef6c0c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBKQU2309237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6e2c1ad4d27fd6a6f6048d8dca2827a9504f7223784f2f4806b749880b86a1. 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/DEDH72300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998fd9b9fbfd9bdfc2d57e5bb40fa776cfe0e001e964392b66563d56045caa49. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US83Z2302350.
Les voies des fleuves indiens - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d471abc2d415728a495f434589faa6d0aefa1170f52dd27127f8f534f74346b. 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/FR10S2370863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc78c9a8e751829e36da69b59455c6d634b99ef446816c9c1ab9a87aae4f71bf. 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/DEXO62281253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05efc057a9e74e509cc5a076d7d4db38cb353b897454dfeb831c825a247dfad. 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/USLZJ2376373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7781448f6de2b9ba8a73728bfbbda5b0f2e54d6e6f6445790674b1158238d1. 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/USLZJ2376377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8a869c8095afe4218890e12edb2796bca0bd86b0fce9a643d44ecfce8236a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USLZJ2376383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74051919013eb2145914c14f836cb5a452f3ff7efa36bd6fec7f61e056ea27ec. 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/USLZJ2376387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9c059beb8b11c6749f449861685c55a5d94e93fb947223304a314f54e23b2f. 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/USLZJ2376388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0481fec4497aceca838902001aa709fbec6f356062ad9bc3b6b832ef3a0e317f. 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/USLZJ2376390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4637e296e8e07e15a835cdd670a0d6e5eaaeadb3610aca894c33c480a51e60. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEBE71900649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c197571d97d4296e96f6d97aabaf763dadf191f38bae9662693bf9f24bf3a16. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEBE71900651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a600d6b4cd9383662c87aac1b6601b775c7cf2db599c6ce666e817757bf582. 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/DEBE71900653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59fa2babe63f7ca74bcf5dc83a810677af1d80555311a34af902d4c1a16fd76. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/US83Z1637546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef4170117c19e3acb388050b239a7843a52cad87e91f4f10b6967f5f4a02431. 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/DEEC33501705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3130503baf4c1ae297f38606dcd02ad92f0a618e3363fd7d73fa5a626cb4be9b. 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/DEEC33501701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef4170117c19e3acb388050b239a7843a52cad87e91f4f10b6967f5f4a02431. 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/DEEC33501705.