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 0x48e64ed91d75338a318fb50fe388eea806139d694c566b81e454494f53ef86ca. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7d30850-00d2-4e94-bb40-40ee6da40a1e.json and https://artists.proofprofile.net/proofs/artist/d7d30850-00d2-4e94-bb40-40ee6da40a1e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trust Not Those In Whom Without Some Touch of Madness
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 0x508559c7ffce990fe3c5e1716925ec4278c113ea011378b19a7ec073490c1361. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:03:38Z), 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/USTJ20414808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0dd016141ea2b93ca870d823eb7d20d967aa54772f024dc91d1cb701b82000. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:32:52Z), 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/USTJ22563001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0dd016141ea2b93ca870d823eb7d20d967aa54772f024dc91d1cb701b82000. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:22Z), 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/USTJ22563001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd98991ff9f7d5bf5da02a83104ba6b8c5a1932ab92c90890866922dc50d1f9. 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/USTJ22563002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda65704c9bb06af7d800e063a83b4bc3e315899b4d7866a1e6071e9828e3a156. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USTJ22563003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274cb6c65a8bc7c8fdde073c322909e8415f444f9938b1d6794672a0c5502adf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USTJ22563004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2babfe6db8d32c9f8a788f0bcb840b78c75c19790b063134d05d7d72ef5dad7d. 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/USTJ22563005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28977911b8fd6345906a53a8fb5a6f7710f991397831f45d0ddac7154a8207d5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USTJ22563007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307620b6c50e8d442ebcf3f92a76fe6ec6dff2fefb6f9c711b4a7c5aee49bd6a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USTJ22563008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22edf5462d84bfdf8ef16cbcb02295062d4b68994e34af4fee98c64888bcd43e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USTJ22563009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9097e91148ad7d969763e25a63ba855c3865196d393de2970e1545528e7fbdd. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USTJ22563010.