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 0x21204a28a260d179d4e837f27116b301f81cda4e6066d656af8ddac7a70cdb38. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7235a780-f4bd-4a55-ac90-82878cbca679.json and https://artists.proofprofile.net/proofs/artist/7235a780-f4bd-4a55-ac90-82878cbca679.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 0x4fc8c26210a35b46e4659a7d484cd36cbc87a53a8b16e4996a9bdbfbada85bbb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAJG2568113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef73f060594f5394be75bfa3fbfd85bc439f0e079f50f0f8b538c6a0a3828c1e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJH2566188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef73f060594f5394be75bfa3fbfd85bc439f0e079f50f0f8b538c6a0a3828c1e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJH2566188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bb45f7467424434bc2e2a7124e803895379da605315b3cfaa57c39eb0ce5d2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJH2533959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1259aef46092fc46c9a638226f48b95313a333e9f511c3cb6291c7464aba28. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:45:10Z), 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/TCAJI2511658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1259aef46092fc46c9a638226f48b95313a333e9f511c3cb6291c7464aba28. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/TCAJI2511658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cc8d388fb9a0aa0184e4bd7df9912a1ad8c2b2facdde154a57985c9688550c. 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/TCAJI2512045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce295ebfc2b18377d547b57e4334f9e9e40a2e0ba365c7a5558a162cbd72848. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJK2523181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3018556640414740fd457a691a5d7d68d3aa67431e437b5ad81d2684113b4868. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:16:53Z), 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/TCAJI2543049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b92848db587ce010c46fbbc97df1404b9041d1644ce2824187d476a12120f4e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTBE2528897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcdf404c90ea1c7cea8b94a1e1c3c503c8b68813e6ee48167d01c1ecdd27821. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFF2561223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e838bd5c5a97c3ff1a3daf5e8138a1bb80fa1590730b2bcbdb377409887ee81. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:23Z), 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/QZWFF2592264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526236d3db86a0c87589bdca5e098e06de7318b9919cd8859dfbaee87af1b189. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZWFF2593528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2906c859518800ae4672035b676d087c0b9f2daf2eaca208143d02611dcad4b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFV2564711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2035c26f93c35dfca143d131f3edffb748a3d523e831cdc931bc4008f9c2961. 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/QZZ7P2526838.