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 0x9174d40993bf52987dcf6c78f340987d93d21b02525d26b2a367f366901511be. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4db85e1a-c47c-4c44-91d6-dab4b94be40d.json and https://artists.proofprofile.net/proofs/artist/4db85e1a-c47c-4c44-91d6-dab4b94be40d.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 0x62b566c1750e13ae6c82fd2d13e9376e628e9caf978d20e6f0b3e206f76ebb06. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ATAJ12100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fc5659d3af95d837d7f284d0667b853f772d5e1e961bcedac3125902fab2e3. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:48Z), 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/ATAJ12100327.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46a604bb81e3ab850263c3859be2b1e60e16ccdf02493296ee6d7857acce6fb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ATAJ12100328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45948ab36c65234d03ca2a04f7dfb75fa9126031775feb2b0a33e698a47a85b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:58:52Z), 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/ATAJ12100329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390c74b0e061b5a1f4954870c60b49963806b51cb8cfae084a0d9874d2e6027c. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ATAJ12100330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0251e8f04aac433da7bafc56f5bb530f5b2bf696c85e119786fd5d8c8ec6d2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ATAJ12100331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8daf5c14a1ebe102de5b55177c495f6612e5eafbd347fd2f1d2240c7412fe20. 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/ATAJ12100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f4cf851194b57640c866af6f7b73a3439a041287ce64450d0ffb71219c338e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ATAJ12100333.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e40486e15b1bff997afeb5ebaf41b0f643487bbb46b02c0fac3aec2991ce914. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:45:06Z), 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/ATAJ12100335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791821fd75b2a7d9c238ad9284b8988bb9e07ae0cfbe520345d31d042258e48d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:59:30Z), 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/ATAJ12100336.