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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd048398f53d9b7c37823382ca05b187777a60e69f8fd5b3b0964e69b08708c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61fddf64-d17a-459b-8382-d3a79ebbce74.json and https://artists.proofprofile.net/proofs/artist/61fddf64-d17a-459b-8382-d3a79ebbce74.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7be2a817a2cc923b6dba4aa83ca283b20a242be74b03fa52cb7a28c27d7e769. 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/US3DF2414045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae59d733977f83332cfb65ab8d7a406e04ecdc4a6c079359940f54cc7a49234. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US3DF2414044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851abf1ed5830a94555dd4369fe5b3de474c6faaeb198a0aafd39fee623aa92f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR96X2442789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2fff9fa90bc6970b8061e990eb0e946ade8c0884e796c49d6f193864bcbf83. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US3DF2407193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3933225796ab9d2cd943c6f148bf318ad1b384a310c1185b2b77da79a9a017. 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/QM3DF2271496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac724499dc70c273aca9306e30240508d849554a13e836f8761a320924d6020. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPC200600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c85bc57c11d7ee6e86e7b91e87e985d1cd445b33717bbd597f32aaad14bd28. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPC200600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9060f2063457ae7115b30adf26dd3a2514ed97f7370dcedd2dc94d07b694dc. 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/JPC200600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb822d3d2b219be42f62fcabeac4f31d29603c16c2f08289ce42771c1e7651. 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/JPC200600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d87defb877e7afa50ebc7236beed75f4e7c2ff2cd06f611a4df7d5adaf6cb5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPC200600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad2b0d8cda422415468c35aeddc7d9bb9637857c1949ff4f313b84fdbd9b655. 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/JPC200600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7645cc2b952681ba7d1113da5c8e07ee2bfb62c20173c299a9f9802c11dbcb05. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPC200600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeae23bfbad5d1d412bcc45f795f5403d46681bf730443371fadbf515bfb0efe. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/JPC200600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f1b4eb30fafd0245db2f70f95bf805f01f23c675a002083e664ce105b1cbb2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPC200600028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66de9c924d55058f1bb4413e18be80d1381ffd4c9fb9de15673d5da13caff69. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/JPC200600029.