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 0x019ae3aa1619a61ec10b8224e8cc5df28a89eacef13e32c11890adad5502169f. 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/fce5eb6a-84cd-45d7-a76c-a26168686cb1.json and https://artists.proofprofile.net/proofs/artist/fce5eb6a-84cd-45d7-a76c-a26168686cb1.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 0x0b9d63aedc94031b8b5db36376ca2223e2a13819f686839b3482935bdff9cfd8. 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/JPU902100781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494fe8ea93e25674a1fc8eaf8629a8caf8d38756ba70b3d9310b023b2faa7311. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPU902101091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ed22b2e573aa04aec0e68e2a70cc2b7e75ddb6cd973b766fbfc117730cc84f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPU902101220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ca1b978be12feea10474ecb71eedb78ea3584e16589c8313866284100aa56. 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/JPU902101250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee9ac893d525aa287c46ccf4a365ebad525300ccba3540470105dd48cd0ca55. 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/JPU902101234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5347406e2d3194f57d21460fda0473964d74503bbdb099c362bd16ef2b2ed5b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPU902101235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b8c2a79c9c86212ab7a02af9e2e6b34a6092d413536f1ae2cb5133ac7ed5f. 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/JPU902101251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8350f5d7cb2256141f28a8393f935fdf26ec2ddd48c20176c85481319e07e693. 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/JPU902101252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831acbbef4a194c5f1ea043539cb011a646078eeba1e27d8d37df35ef114a729. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPU902101253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bdee54eb100239b8a21f7f06e2a66db17806458f869a0280dce42e09b4d1f6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/JPU902101254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee9ac893d525aa287c46ccf4a365ebad525300ccba3540470105dd48cd0ca55. 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/JPU902101234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ed22b2e573aa04aec0e68e2a70cc2b7e75ddb6cd973b766fbfc117730cc84f. 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/JPU902101220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494fe8ea93e25674a1fc8eaf8629a8caf8d38756ba70b3d9310b023b2faa7311. 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/JPU902101091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9d63aedc94031b8b5db36376ca2223e2a13819f686839b3482935bdff9cfd8. 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/JPU902100781.