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 0xbe841d571b229337a07916d751835c36282dab8324f19f6f1c7f65c002d74570. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a1de1c2-a526-40a7-a2ab-396bdcfd46bd.json and https://artists.proofprofile.net/proofs/artist/9a1de1c2-a526-40a7-a2ab-396bdcfd46bd.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 0x443e8b3d2d35c0a098b70e44d6cac8767a87391e220d76b0a4d96ed630169a7b. 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/ALA091801005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb20b6bf85a7ac7a2cbb2168a73097e11b6cdfeaf8e25784c2a047e9c3668e2. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/ALA091801018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc345a70b2226dc9c85533e2caf45c51fc249d01ab0819027302ca228bdcb6e3. 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/ALA091801065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73a5e5148f3aa7d645e261f6f92545ccd0338ff717b9f73a45d183e75286917. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ALA091801070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d912b403e22679ac99723b11d2bd77ec69e32ea42725baf343c7b23fd8551b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ALA091801072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b61af400170d8dd2c478b99f23bc261db92c82779c6fe6a5b13120586c69f8a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ALA091801106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd96b2adbcab2234bd7e93f5897710c3fd4887d70e56c0f6dfbc0584910232c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ALA091801107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a314547901c01dc7dba20b466f6d09eeb1168d52a1b6a2937d0bce9e827c70a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:43Z), 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/ALA091801110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766a65804d6b2fc37e8c8f6607a0e4d862ab7788e05059ce2c79db903b654c99. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZAKB2328062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ef045d1c5349eaa5ad5ac720f4174551618d187b36539ef88be7d3c3ccc041. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZAKB2328056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7763ee807835e0a86ad7daddc0beea69e516abc09117c82bbf703e064e9f1e54. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ALA091800041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d8d3b825cd3ddd7d1f402867931b78373b1ce9a854fb90d9f536f6f338f50c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/GX5MX2218983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9fb2bdd2bdae171ef30067d0a7916184948310f9785142d6ac9a28fd64f49. 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/QZAKB2469764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d70c2f0a8e55b2277abe5be96383dd8c705594a810596d22c5a77f1bc8ea8b7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DETO41932635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd824dcc101e0068895a6af2f74d34a52e9e8b9e61c7400463105eee0f1fb602. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZAKB2462216.
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