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 0x593a03d09b4be1661bad8bfa4109737833fb135c3d0846a5d18aaa7c90c83534. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fd3edb5-47ea-432f-96d4-840754ce6558.json and https://artists.proofprofile.net/proofs/artist/8fd3edb5-47ea-432f-96d4-840754ce6558.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 0xce3591d1d0dc9cf549093cb86ad3dc15939516a88003dd63b3d21635a9d28de8. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:53Z), 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/CH6542108222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6207099ed71e0b148d53cd10b47678d4f23aa02a1cc705a3c6713dde73288ff. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:55Z), 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/QZFZ32491303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00eba73463a6f0b7297cb6eccaa86461ddc71a13dcc6c8eb25e0f59356727df. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAT2471060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd165417c8dda802737e3da3946b494dbd35d0e964f841a5221c635eaa488d205. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZYFZ2483453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9194f9b520155a5cb2436340304dd74273a281179e248c52e355f565b848bf21. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:04:10Z), 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/QZYFZ2483454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937fb42b8a2201bd05b00a54ed1412a9dc52c3e731bf06b89cca68256a48a639. 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/QZYFZ2452376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bef42f0f2e8b0a84b6c9d944cc9eda6dd5bb0979ecc0607f602ee0030149a7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZYFZ2483457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7907c15db3518451f3ce57ff334b5c3cbc61f257abd10918945f0f080de43fe7. 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/QZWFS2457949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa5572d39e04e42aaf574c8afbcba1b69dc7be90d93a7551d6f9cef1b9c130a. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAZ2584930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd0f85deee4cc57f99cccf22feb489321906d4863bb758ab6250f321367a79f. 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/QZZ7Q2590109.