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 0x05f8d7f05bf7f4d82184783e82a5d1ca23245480f4251ad7526e670519c73ff3. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/857353a3-1d1d-4912-bafe-a0ba86dda337.json and https://artists.proofprofile.net/proofs/artist/857353a3-1d1d-4912-bafe-a0ba86dda337.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 0xafb0f4a4810f202e38a895a47e5ec3d600f91b1c2390816b7b73a8e18f566ea0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZZ7X2400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3af6c5a54dd9e0c493bdcb78e754cb4560d7e084fe6daafdc7d81deab95bc80. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZFZ32505023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026f9265df1cc5739e3084114f12a45aa4cb9d4c7cd51efdeb687156d564046e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA42529010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4404c4c95f1cbb8d5f65e68e80c8d0159187761d11dc10ecec632e05c96518b1. 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/QZDA52548289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a769050c7ce9e4666993fb64e60c91abb3ba3e54cdaa0d79d7ed6c6d9c06934. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:37:02Z), 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/QZK6Q2569396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892450e3b2207bcf34e334005ca2bd149ee42efced77e26b23ee340753349bf5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6G2556624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555daf901108555e7fd88260a133ed765ea3f2f04949c129cbfc5285ba0957ec. 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/QZTB32518968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22baa43b533c88e4a3d3a6db04eeb5cf2d244f699376867cb7263f495f94cd58. 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/QZWFQ2519858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae170a1667e93b1313e26dfd7d86e741cdecc23248cf552d5b836a3172a863f8. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:09:48Z), 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/QT3FB2599394.