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 0xf7b389d11f3bf31900ef553abab56a0a480b4e1cc65cd0b678874b7118920e26. 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/2f250758-d986-4033-87cb-051765897f45.json and https://artists.proofprofile.net/proofs/artist/2f250758-d986-4033-87cb-051765897f45.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 0x91d52530aaae1bc0133f602b4af91645090b351b2a2f207729fdd4b20ab23668. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMWWQ1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d66eb31a8eb7e81a8eae9fc6eca9edba34c71901e162969591038753c63dd6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:41:34Z), 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/QMWWQ1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76501f5fefbca1711df00a4be268460fca1b872df47169a0839223c1e1598e3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMWWQ1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d0ae4d9df6089c5fe94e3240a2a2e592025dabd91debf5d4121063b8d73631. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMWWQ1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09323ec31ead3f6258a661ed41cf75a63b0a9027a8899a79360d65cfc01dce66. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMWWQ1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c53222ae275ce1a994bf2c00b669c4ae282fc14f8f9e7ff55c63bf6b4ccf9d8. 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/QMWWQ1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84acf6d28d2f6c1536a2af2626e1f8cded7f3a5aaa2d72c6c4b2e66a2f883a38. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:28:35Z), 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/QMWWQ0001801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2ada894c6da5025b7b30ddd35bf1e0ad37a8ac2e9d419c3df669dbb36a7f0a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMWWQ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a689de8b6fc83260d4ba837d246bc6940ef8cd4f9f63c362bd9c7490fb484c. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QMWWQ2200002.