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 0x9d058f28e8581c37025c0edb7d181b402d06e4f6bb1a6ce2a944cb594e847f11. 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/4e94ef0e-31f2-47ce-b590-c3a6fc3d260c.json and https://artists.proofprofile.net/proofs/artist/4e94ef0e-31f2-47ce-b590-c3a6fc3d260c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xbb324c59620d3dd5855b840667f0aff70cffb1b9400245087f871a36cb9645dc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NL4NL2205428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a7521133739ff3199a51ebbee41400b99af154c2c1cd2cb77702476ab50172. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:13Z), 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/NL4NL2212676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd52c219b6542604d9da1791efeb744cae23a969425af558508845131307c52f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ42382707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bb3bc9fbcf592e21eef3f64e066190d5dc0e88186227deb0dce65c263769ef. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES92353178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba6babf47ad20878bc1824fcc16b73c2c83a67478329334d0877edb87c7313. 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/QZK6P2300826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71912cafddccc61620d6827aec4571e89ad265241e41711dbb8d676c6259b533. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6N2388033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e77875eab8098a3b83741262a5f4d5c5e4d4c4c7a592c39626554027a56af9. 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/QZFZ42418601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb9101ed5cdafc6f2ee6c33875bc101fd91ddbcbe871646a48f73cb2262ae6e. 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/QZFZ42418604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a22faeee3d0dabf3a7762790685407924f3151bc73ce6f0a829aea8d38022bd. 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/QZHN62432242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf738a1794ea573aaeef1ec0f4ffc97c8e8c2d04b1cd56b0ea21da04789a1a1ed. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6F2551357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6458bc046829c736cf56feb651909c3c2f4839c3414ab042b4c2015924a323a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:40Z), 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/QZTBB2596484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee68705084ea5196e58c1263621720ae8289e5e32935733e2b5a14785f8d6b4. 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/QZTBD2301178.