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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf078678fab757c19661f7d113cfdbe45bc191d01a26cac8de2ed19a5a6bdb2ca. 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/de599fa9-13cb-44c6-b262-767d5cf5f849.json and https://artists.proofprofile.net/proofs/artist/de599fa9-13cb-44c6-b262-767d5cf5f849.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7a91ed50ed3812b3847a44c2faa5b081ab8fe90b6578495969b7b780f123b6. 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/BR4TF2301884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea001b22445a2bee2eb582b80a51edbd3974f442fdd0a60ee6b23b375dce5485. 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/BR4TF2302764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7d41fc54aead4ea2375524617c3498905abfabc7941e0bdc499f70b0a35a14. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/BX44O2401865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f74e1193af1771970302a8ca947064eb14eaf3fbff97449c90bf95cb51f748b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/BX44O2401869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fa72562acf061087e5dce2f24d2a58cb96879ebf7e5dca2e725b56d1612160. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BX44O2401871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150a584da47c9ebe6add135a17b36c9d068c95c57084be17811aa66b6b7b222e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BR4TF2302763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520500cbf437daf08659971891d992eea4223d8d47a11fc59765f5e0d903c6ee. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/BR4TF2302761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511053dade5564823f291a7c1ef22e42741a5b4f541e054cd3783ca471496ecb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BX44O2402987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4461c65b6a9b125dfa7c3d496aa3fcd270120a542b99b62c1bbb9e395953ed21. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/BX44O2402991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f18acb2967474bb982cbe2dd5074698b069c8f76415965d42fb48fb510a6e46. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BX44O2404347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4102ff6bbcb81a4cc4f9ad58eeff3e1d8fbf33c5f233398e716d836e8c85638a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BX44O2404648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7773dcdf730bfaf25f6912ba61464f0e692c147f445305b48639231987454a5f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BX44O2404349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297f1a3e187ef2682ac83e439d78f929fe0c4d982be71d1af0bc31b2783968c5. 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/BX44O2501026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77257f74d473f28608b18461b7b005edcd7c2d1dfeaac1d44e0756f68868b290. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BX44O2501028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcac8cb8e3f907d00b1730820ffbca98aa313598cac749a5b10307b3924536b5. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/BX44O2501090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb10192a6cdbe0776585fdd342fc744bc0311105cc0d95b222c3cd8b2c4fffe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX44O2402925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782d5c2fbb0405571de867601a1506fc6e7bc5f1bdbb68fe4b695f2eb13e6cb8. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BX44O2402926.