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 0x25295ce3380cb5c0c839d2f32f785f2fc8e68ff34e1a6d6212f336c1c647f339. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9110152e-acf6-4b47-ba82-e8b95f9bc906.json and https://artists.proofprofile.net/proofs/artist/9110152e-acf6-4b47-ba82-e8b95f9bc906.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 0xb193923c15362d8137f2164355c3dce5f097da30b690e1b6c411831391290125. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/NLC240600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edc29900c7e106981677c2740208bdabd001700b357053bb4bee6371daf231e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/NLC240600142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c5c66712008a2d363adfd173711bf500c598a43cfd78616eda0d605d029866. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/NLC240600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac435028d176efdf83416e42f99f3e77c64da89cae977b42961464e9b5e0136e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/NLC241000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1174c2e8d0be896399e457542dbb66b8403fd254a7448c72c6f7a0a47d01efb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:20Z), 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/NLB151300943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3950f15b7d39232761602c3bff124a85060eb374103b8ed6a9bbc96d21764529. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/NLB151300949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa67265166946bf4d38664e2ae1e6876cbd01bed5f91c24daa6941ad29467276. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/NLZ4P2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac977392238ca51f95c081e5621b300ba9dd28f4509e9c353bfdf8ecffe61002. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/NLZ4P2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca83892c7a2556a8472996924e4b415ecba9f8c47b3409c74887c5fd8a1196c8. 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/NLZ4P2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc671507c2c1fa95bf1b0754a5aa70e3c79d54e332da13a71ef329d55bff52b45. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NLZ4P2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28cc25bcb4dbe373ee69699519130eea54b2887b3b3210f1403244bd652591d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:25Z), 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/NLC242100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dc1e68cfb7ca0eb9c52970bcade42b714b64bd3f399dad813e3a392b9f8dc4. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:51Z), 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/NLC242100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deee835982d187ecebc834ec5ad39b5116ddaa06157b01039b65c1ea1f68cfa. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:10:20Z), 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/NLC242100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1f0fe26841a2e5437e8b492ba7cac0c4855507f12c87e71b01e722072ffeaf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/NLZ4P2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf716ae928bc7a19e66ffdbd4a3ed1f6c6a27e591a44c77e188b347ecd61cbced. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/NLZ4P2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e39985bfc119ec3ed08519cf9797fd39c67b507b2d52753005ee707af1300d. 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/NLZ4P2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf716ae928bc7a19e66ffdbd4a3ed1f6c6a27e591a44c77e188b347ecd61cbced. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLZ4P2300007.