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 0xa54dd4f4af668638b5ef5c289cc1f528ceb370eb9d193d35738de471920b9783. 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/e0dfa171-2f12-4137-8406-d2ec243688f8.json and https://artists.proofprofile.net/proofs/artist/e0dfa171-2f12-4137-8406-d2ec243688f8.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 0xff7ed3ee3df5417e3aebba3222372907ceedd27974732ecbcf763b707adbffdd. 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/FRX281936991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4113de0d77ffaa4667ef995c3a7745e87ce3f16fc98ea5af51a2a339f9386b8a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/FRX452037670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf72210c61f683bd340fa6d1503ae1573aee1b21e90196204ba942188eda58ca. 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/FRX452073891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099840dae200b56b73a2c98aaa2155b1d20e311280d7b41ef48d1211ce8a627b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX282030750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b060577b33daf96fdbd4f1054c9428cfa1f387d9db479357e62612b15b55c8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/FRX282090016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f27937a2735c3867448974ab39c5527f6a2ae2f4eb8b810538ed9d0fd4e5e58. 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/FRX282090017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b588b75ff4603062d93bc0a52ef968fdf16892416842c64ac24c91d850757d9. 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/FR26V2041049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298d72b734e5df9c74a23972ea8b07fdade9f9166afb5036905b85853ce6c363. 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/FR59R2138723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79db9d3c241356ea6b69d1149d6ab4a3d313d06c19ce4d109028c4f141d49bcd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX202173802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6465e4b044fe9733ff3ef1c05ca7d93723aa4a87f9a37e8f5603d6ae577c80fa. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/FRX282106828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb77c39a0d246f6ff662d23a288aec1b5056679d43e422880063e028fa71185. 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/FRX282151526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7806ffc0d93f65df2ea48ba6e5894168a07d37f33b7ddaeed7f45bd80ac0b6f. 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/FRX872178438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5150e1980b06b3b505c4ff0aad1bba0229f9b9c7e316a57699f557b0594949. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/FRS182145554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d86c8042f0c506f6b53717c9444ba97ad49688b5ae77b4e35262eb9affd7e9c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX202215375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b3cd952fe6a6e1afe730d3370877649ff4dddb33a126298fa7197d2645086. 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/FRX282219722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486189cd0aae10bbeb10a937cddc93e9bbc9d337673d7b426230c3d561236c95. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DGA052293893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9677f335527d0918171690f2ec7cd2436c758ff6f2a720689087811c84dd29e8. 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/DGA072232758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4268996e7a9f1be1f89fa71054320e257b48a2e2497ef9ba5f74c786120fd823. 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/DGA082262693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8570553fcd5d8a019225a8462f45649adbce86d23e26230bf510610b44dc2100. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/RUA1D2363501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b44945504c08771104442909502519a54a052a8836dc39b4551aa48eb328d8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUA1D2377552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7678b37537a55e8e526ce066ad75d5b67fd5244fd0ee1ecd2e88784204afadf3. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/RUAGT2312531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaba394aef829d214b7ea7f30e8cd5a101095f62a1e2b3ae9fa5fa8f9f1e451. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUAGT2332157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301bfa0ae5ad2618d7e22e9589319020ef2758251c1a1c5aa41d588f41023b02. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/RUAGT2354315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83b026da8fd7d769e859555dd6fb1dd75b28c06441a3470969b05f7e0c9cb74. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/RUA1D2401969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e42d4b379f95c738c61d4acfa5cd4265c99e4e3eb1f7703fa4ad06520f125e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/RUA1D2442468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eefcb312e75deb1227bfb62450a19e271933b4d1c35eeabce4aa3b13718e47. 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/RUA1D2450003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa8d09ba932b654ad5668d2943b731f3163d22a48cce065a21b620df149b542. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/RUA1D2459222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267673e1add686578ab7ad527e395b909eaffda5a4327fc88c274995056b4501. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA1D2480853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ca150f265a9633530db461be238d1f793f5b0d8528b35ab7775370b195cd42. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/RUAGT2454767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f9fc3e334c5e9e97a3049b09770740a4171e8084a3878e8e7bc000aed8e836. 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/RUA1D2594719.