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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b600cb869ff536019bedf6d182dd457a4da7aff5c657de1918da17665038270. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/974b947b-abaf-4406-83cc-59b3d72d79f4.json and https://artists.proofprofile.net/proofs/artist/974b947b-abaf-4406-83cc-59b3d72d79f4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72365a44f4139a6de7063a570cf106673ebbc04205dd38602fdb09bcf07937f3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6L2245875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aab70f3965885d6f61031385b96b4db5a102503af3a6f66c35072f6e1e06e9. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZK6L2245879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fe1c591f6e0eb34469e640dcce60c29812ea0eab08d74d3b0a4bb53a818aa6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2245880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122833bf7817a55e05b8706a49f24688a3a8bf13d09dbbf630b2129ba253bd75. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6L2245881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289e4e1ee08d46a68821a129b612f954084690ae367a9029e05f01099f124e19. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2245884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b302215d554824f0e7b26b52754945f525ee30ca0823ffbef2f8fcb7404478. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZK6L2245882.
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 0x70c976ddc5894bfbdb965468d67e572ba47fe519a52b8cbae8507789f4b14fb9. 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/QZMEQ2160044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8342b45703d502697e2c283d95aed9a028b936d9e37a09fc95ce6adf950d9b36. 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/QZMEQ2160046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a6363db7ea668730c4b5ff13d2461d1f31d103a467a6d892d9afa2120db28b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEQ2160048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478d36ab23199b38311ee834a8c085139c5f13dd2c206e869a2977f84f198508. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMEQ2160051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df585804170fc51634186835ae29546e86a17a2a671acde65bb098301e08332. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEQ2160052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b42463890e5456ee6100cd06132877d69ea510005f80e023f3f778f238d1f3e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEQ2160054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373700cd64a4c73d86406e266784edf20385bc71e0a31bc67ea73a49b68afa0f. 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/QZMEQ2160055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc5ada515ae3d5db84aae11c8b92ffc27a4d45e1d0cda40ef834f18dd6baab1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMEQ2160045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640eb9f30f904ef40c538fe7633833863cef03260c4ec436e19ee866cbd8333d. 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/QZMEQ2160047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570c96e01db50df45466a51067aacee88e0373000c08b89d147eba239763f7f4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMEQ2160049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf852f7cbf82dd3a74d882b702a6acc2ed30daaa2ae85482d8e4ddc84535ac991. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMEQ2160050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d9ef0c799c2a6bfcd9b8f8db22277943c3f42762f6696a7f0a0bc85fc934bc. 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/QZMEQ2160053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da414b3f3a8e42792423a91153667213e3c6877f4b0229f7cef41b75bc16f82. 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/QZMEQ2160056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe117f573747a317f0386e6dcbedc88f8aa799f5797cc83b8b894dc5b008ced31. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZMEQ2160057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b405a7b98adb6977345249f59db62b5491a6331ff7bd620c2b87002c5a97d1. 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/QZFYY2041945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f7f8efc456a315a3cf73ee9befd83bf32f794edcae30820f92015f89f10863. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYY2041948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe683cf3cca761ee4ab6f94db497a635d35c90635a51df6797f1e855ea57beb92. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFYY2041952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0238557afec3a88409c8e0bd5c96308b3bb05ae72f8aa27732b91af87661066. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFYY2041947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f29985208da298c379ef0f9180694871f65ec5b5ec689327f7926c47648f7e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFYY2041949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff0f496a86c94311902853bc275bdfdaa48753d9cfe78f4d2ac040a1777c56f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZMEQ2258123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0000fdf279b27570c6dabf02afd792f95bc2e74d1b98dfe7f67362ddbfccaa9b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFR2320593.