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 0x1e5ad206e31676a55f686d3511b2d10972b9ec5caf492ec97b41cedc0f8b9d9b. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f94139ff-6b58-440c-95bf-65902decf21a.json and https://artists.proofprofile.net/proofs/artist/f94139ff-6b58-440c-95bf-65902decf21a.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 0x65d27f835d5006e08521d70b4f2bd180eea3442a27f941bd7053b82244450705. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:58:48Z), 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/USHM22388534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eca5a695c71011a9b379dd3f09610abb4296d3c800e352ba985ed9cfea99e9f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTB62565185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eca5a695c71011a9b379dd3f09610abb4296d3c800e352ba985ed9cfea99e9f. 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/QZTB62565185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7f4bc2cee7d1c3c30eb4cebe08a5532377ec4d99701b251e960f29f0f32c86. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFJ2503485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44baebb0add975f63327b4bf22a91196f0c6429be59dba83ea22a9644f2b5eb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFJ2503486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170ef31ffd5873aa8d93c30a50626f714676a0a650dd5287c92928835b9340a5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:35Z), 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/QZTBD2539091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5217cb5dcef1e4d5e64b8c2a14cd14910a1d542bb539704fab9589d2fb0ccd2. 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/QZWFJ2503487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81802bcd6061eafcf6b39c4b4ea5830dc6a41f06f4617cc9aff76ac70fb90a55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFJ2503488.