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 0x8944870157f16ce48d9744a4a800e7f94f9ae55e34913d80010091bff2c4ad1b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad6c5974-d929-48fa-ab59-67869b3328da.json and https://artists.proofprofile.net/proofs/artist/ad6c5974-d929-48fa-ab59-67869b3328da.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 0x4d3a6b9d7fa88608face9eff6b006260b3be5681b4d34b22e0c6b3aea1cacd95. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:35:39Z), 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/DECE72402847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc536dfb267b55a876a30f76da51cc658e9b5e8fdf8a9b78f43c8ff5a4904d9d8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCV112300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b512ecd46251c75ad9ebc4459daa017d09195dc4082e6f3cae5b6649acc548. 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/BKPN32400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6b53128120f54c16f93dc91410b6f7b07fcc7bc0ec4def0ee469a193721bd. 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/DECE72402412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6b53128120f54c16f93dc91410b6f7b07fcc7bc0ec4def0ee469a193721bd. 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/DECE72402412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6b53128120f54c16f93dc91410b6f7b07fcc7bc0ec4def0ee469a193721bd. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:43:12Z), 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/DECE72402412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a6b9d7fa88608face9eff6b006260b3be5681b4d34b22e0c6b3aea1cacd95. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DECE72402847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a6b9d7fa88608face9eff6b006260b3be5681b4d34b22e0c6b3aea1cacd95. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DECE72402847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea202a77539e1a09da10cc9059ee17766a4e23c764802d5a08ec91afc2c8d09d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BCRE22500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2503e2508533c3b42d6a703791dd00f270ab465d3c808c34a8910067af23a082. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC1AQ2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a6b9d7fa88608face9eff6b006260b3be5681b4d34b22e0c6b3aea1cacd95. 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/DECE72402847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6b53128120f54c16f93dc91410b6f7b07fcc7bc0ec4def0ee469a193721bd. 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/DECE72402412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a6b9d7fa88608face9eff6b006260b3be5681b4d34b22e0c6b3aea1cacd95. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DECE72402847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6b53128120f54c16f93dc91410b6f7b07fcc7bc0ec4def0ee469a193721bd. Chain 2 (Bitcoin): anchored in block 956970 (2026-07-07T00:37:51Z), 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/DECE72402412.