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 0x2fc9923e3fe6d194b993f562f01e85be450cd88d655617f02e7cc2b9e1b9547e. 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/ab01a14c-e2a6-4260-9a02-bb3d30b90e2d.json and https://artists.proofprofile.net/proofs/artist/ab01a14c-e2a6-4260-9a02-bb3d30b90e2d.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 0x1d51940e7bd48d13acf05a596888f2c0efc8139ddd04bd7d94e40777b40c007e. 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/CA7TR1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97d2adbf7f1651226952be10f0574a73527e9297243439c810e80e418d50146. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA7TR1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfd19acb923698d22c7c472e158c890471b4bf1b869551e9c1d8285052ff39b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T03:01:54Z), 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/CA7TR1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dab08f556022b69c66d2ba95793d5ac080bae07966910e3bbfe549438664576. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:21:35Z), 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/CA7TR1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2133613f50f5636f65e8d17c90ece80007022475d4819565f69ba3f9c445453. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA7TR1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bf0f8eca82e79e065797c59ffc9df260ce88c06d5bb18161d9ee94cbd258a3. 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/CA7TR2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858310f671a889c8e89293e310dff0bbebf032a033d752c0a41eb5f54c6fc1b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:13Z), 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/CA7TR2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84d1bc7dff6ba678960887080ea613a0aa84072438b7850914ccd551806b962. 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/CA7TR2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5f5221390f0838faa540ab41db90ae5dbd4c9a616ff3f4d54950825cd78109. 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/CA7TR2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca416a4f2dca499a0b2b09b201751cbf607b05c7ab844133420a6d94cdb8f1c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA7TR2000010.