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 0xb6cd225ca51b44b5951b4624f80ae42a52a50afa23f872e49af970dc7d8ac51d. 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/ad0ef6b9-2a36-4a46-bdb9-da9395f75e85.json and https://artists.proofprofile.net/proofs/artist/ad0ef6b9-2a36-4a46-bdb9-da9395f75e85.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 0x2038e31c6e4590a125e726180854ff05aa2897e131da545adc5e76e931ace145. 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/TCAIN2442320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d2796c0c6f766132fffb46716ce816bd110983e30850854e237a6e12eec1ed. 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/TCAIA2476819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c14b6aad2f2df532b5271595fe6361c201b3e12de063a42f77c1555f6c7eb97. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAIA2412429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbed9a93b8b46319b4ef3e898cdff685e848b9c9b385edba45f70c99ddf3f56. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHU2407722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1a5dba34ba744139d6d6d83539305796b1d40c8348070b834894a8fad3659a. 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/TCAHW2415699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1ef95f51b8290d7a7cedee341e515412e051be10c15b160e363c5bf0168151. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHW2415564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a514c60b41ebf4be9aaf91ad737d7f118e56d74f1737a0c980e6623232ba6b7. 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/TCAHP2347045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3849253938268ab374f03f53e82a42a7d38a6aefa5241a7ae367783e604c31. 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/TCAHK2368129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8644a3fb24be3d7eab15bae7ac27c53183ed5e423a254e57a4df42a61a2823d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHC2381580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd038de54d91d1bea46bc73a9a407632ea0fb3530541bc4f5061c70b03f0ecf0. 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/GBHGV2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7115dd7918fed1f3dad4ba0dacf8a9cc9d958a2af40aaeca9e51b3e8dd21d3fb. 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/TCAGO2286933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2f4eeaf8ac68a6c0655eacfa995c1e5c1573749e57bd2c7b962f814445f5af. 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/TCAGM2288686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9674b255dc07b07d912a0d6e516651ca07231d9a87ec7d484d32daa5c2d0ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWV2208377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd2729d70f4ceef9b006bc5cda3dced198549b5d02489adeca5b99ebf8c9a6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWV2209948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf746fd75c5d0c950742d9123845af5070d6487060f099209352752f98ef9e05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2200641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb98c52ddb96ce5f01416bccda0674b21ec894d609a39c0bab2c0ea36050e786. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2200640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b013483b193bdbb43ba2f00a872864c4b4a95b1b0730b3acc0b73096ecb4069. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6J2120815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f9378fa3bcb98373260e6800505c69f65b2867ae288020c0b9b341ed8dfb7e. 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/QZHN72174394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8068d9f563ca41f93bde628a5db252058a7ddededff4a151cdaa96e3bcd3470f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2103223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4f72be8380dea23348c4f26fabefd14c1096018e49b7f7a1d5791402813605. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM24S2102953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3252461a1fa3c6f7c38934289671e94f74a90a8878a316de767787eea199c5e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2100670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858443669a9de7cd748a3cbb337a0f471dd1148c93298dc3a6cfe26547c79cdc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEX2007629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22603835e24172495ebbb98be9f087b8820a634f25b42b92f1091205255b2884. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S2004216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faf936271072d4dde670861502aa710b8e7532d3a6b3b2f71b14be3631e7ff0. 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/QM24S2004215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada52cc8291b2baefb57554243ffe82b73108eb04244d0835a141bb491ee0e0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAES2097008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa192333010cd4bfa6ab5a8171966dbc4e77503df6574f6b4e94f5f8b9fbeb39. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEQ2051772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc69cce76b7a150a89ca40f9906dd67de7c56a80755d2d3ce109d67fa092a425. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEM1935285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2ab2a5118f292eeadefa45354b5d6222be076f410c97e79c706d5561347964. 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/TCAEH1959699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cee178a239ee6057dc18559eb393774630e290f3b9e7596522f7369fe76a47. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S1916967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18aedede39d876d116768afed1044c56112d9d7f25e9f5ca3dfb7fba7f759d97. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM24S1916991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68f67c56fc78a830bb6e612b1f6a774714dacbb56a307619baaa257ba2d2289. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S1916900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc948cc341e6119bdcc9506d9bf0f92956c21cb3ee92af860f26b1dee8064d5ff. 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/TCAEF1916013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa300eca0c24c15acfbc7b03c38e8ce179da8c32ad294df0ba184d5b1eca63e. 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/QM24S1913209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b5d77f986af4329242da825115c7db82159fef6d936973b98a465f0ce520c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEE1909029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e55fa6ee786d543185c02af06f6383e21805229404133fb6c1c9078d299630. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAED1975526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddb111ff545aa668a0286eca411a19d20d392db951117a1d22a5e78a7bb5225. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADZ1859425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf096154a9c6a00ed21774e46bd7715b33c60d5a10649f8d6027dfd1e3b92089. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM24S1837308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204deec56d8ad0d41835b002622aed04bf9a8742de372167f52bbb21d61565bd. 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/TCADR1813985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c175cca168abec1dcd718ef67d013cb1d5c6382de251dab4a5cd5e6597e0888. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADQ1829901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff7cb135da6d072e4401ef3380f424443a13abae43aa03738886ebad6fe874f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADP1866699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe393393118f94ecc0168be8d0b22e21c55293fff7c0f1dbcfa58eb9d5fb499b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USKX21800008.