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 0x4a301fcd88f40b7fc33d45466f269e2221daa2d0e82267bc7ea4ca75e5e736d3. 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/330d7bba-91d3-4c66-9d50-181ad14cd54e.json and https://artists.proofprofile.net/proofs/artist/330d7bba-91d3-4c66-9d50-181ad14cd54e.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 0x5fe6775cbdd366683dfdf4165e39dea0d2428bdd6e42df1e389918b01b6b5c44. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2110117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd246af34e20410a25659213210213d5ca19cef16ae529f9105c83d2633d6d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB2LD2010137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd29a29c20788231acd7cf7e0e2522783a3f092e3c24af413b039cb7b5589a6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GB2LD2210299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd246af34e20410a25659213210213d5ca19cef16ae529f9105c83d2633d6d0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2010137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b259481034de4cd197b6676d0d75ea3ec23961ff32d7355f8272074dcf9ff5e. 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/GB2LD2210285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ad14e82a0641fff58eb1262c4e53a2b6eca5abcba14438984535785e82cbbc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2210197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600a9dde8df904ed0c564a9fb60eaaf486327db8704a4e725db3a26a1f50c3e7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2210146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1ac2cc9072629f73ac609ecc82dd17674fd1178781181ac654b80a020931a5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2210122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2368a8b9040c1aa5dc5ddd60b3646c37257c8c25988c0f4ba9488e03a2ba4c1c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2210077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a35d1d5627d10834ae4c93815abcd06131b4ce66c8b782b2b95b6e56f496b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZP7F2207059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad85bda3dc79aadae73a880955d9c6302446fb354a6c66c96bed83f2ee43afcd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL1ZN2001399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d40b1a96200dd9b761b069786aa095bc88c967d9060c8a5d38e686c71c4721. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL1ZN2001238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa58b6e73549e5d3b5ca64513af230645e62ce9c877a985f31384f8cf2fefbd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL1ZN2000882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375bbc0d395752ba1997da8fc697c99b5ccab37ec781cb490e12f164e7580521. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2LD2010306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a00a8316315f2a8b8a0e9761e93b49f09b1c9256eaf43f701a9bb87e66c242. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2092308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a1dcd6baecec8f19e0b56291b1a657998c7ade36e3b22919529d46d9e9cd13. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2011759.