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 0x251f639152b6fb4ecc5e95005eecbce88425d2356aebd8ef6511f521660c08ad. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e3513e5-adc9-4e27-82c1-df11650ae97f.json and https://artists.proofprofile.net/proofs/artist/2e3513e5-adc9-4e27-82c1-df11650ae97f.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 0x83d0186f4f3b1761a57819ff3de9edbddacc475bd5f512cdc5ae8336b1c09cf3. 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/QM42K1705831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78049384f8086262f8c9fbc81cd0ce8b1431621a095933a729b3b55c31697dbe. 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/QM42K1735293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf53f9942ac7e9585451cb02b4c95f5beaac887b351d762c24f036d496e4d1fb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM24S2102700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bd080524ff07673f177eb4ff1eaf57616cbbae3ab21acfa94e53bfaacbe57c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM24S2202808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3af40ec4070fc54d68e03a2a433bb0395ff18b42efa20d063a027a83110278. 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/QM24S2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc994b4c45ffaaa4f90a0dd533b587fa15aac8ebf1e68c55cbaf360b8d67d324. 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/QM24S2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ba27c172a3d09f64b1aedd773b9716ca865e32d8587c883bb27f27de963bb8. 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/QZS652302851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b977d5e890c696f6d7e95efc356b350139040bb515485bc84f7fb1854f5c8d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM24S2105752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe630970a97c4837be77b888d05d028d8886b79845294451945ebd36f262c4bc4. 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/GBKPL2147777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9c4123a6e8cf27f0830d95fdfe4247b73530fdf36d21b4e9898ebb8ac54c1e. 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/QM24S2102841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e6e743f3ac9df8df2b171cf4f6a98685730b5ae39411f3c3aa64c6c7af2e91. 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/QM24S1925763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf831bd116291ca67fbf0aaf537257bdffbf7769250b029acfe96f472db80aa. 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/QM24S1911732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab8c749d741f183148c87c546e0fd23959b1371d3510ac860428e91ff42f1b9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM24S1840322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d99b0cdd9f8c9285165715900361d8253d65bb71d7bbc6c681d139e393b6e3b. 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/QM42K1733881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87743729614d5ea18edb8e8f26c4e1e0ea6fb241aabce155c54482cf048adc0b. 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/GBKQU1709075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56152717aaf7a4648a32904860b462b37827ffcdd0a79095832835237af968b. 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/ESA011621762.