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 0x885a298fc881968add6b0b5e6b8fe0f96a1326ac5a51b52602b310dc94783ede. 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/9a59fcfd-c9c5-4f6c-991f-ac865811eaea.json and https://artists.proofprofile.net/proofs/artist/9a59fcfd-c9c5-4f6c-991f-ac865811eaea.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 0x603fc664fe69272b1ca4c4a226dafc7d57f06ed75ce124755aee36ed7756c32f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM42K2034994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f35ef7d626300c6df587454634f965d5ea6fb82c4d4b0bc9b54e72726efcbf. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM42K2195821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804eaf2e36610b32b65f5fe9b1ed7a7219f1491d0692c0ef8add7f425eaa855a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZKDK2104512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2f52e7e0c5ec34d375caa6c4139cc19feb1e27826d3b44583a53b1d3e592b7. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GB8KE2160258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96c34f5897b49287521584d77b5f50b56ba7c80ffa5a8dc4fb7e7ab00fd0a9a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZAKB2159176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4e757509c7d11aa2ec9c605a4ffd5cc4be991ccacc036fe74d9a7802980d8e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/US3DF2243651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd565436f6e69f9cca1c61615373b7a498212be9b4a511b1df9af9450c356695b. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/US3DF2256852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1f3a32698c659dde0cecaa46e79760955fb3c5b8022b0dc642da063e52aa72. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA0L2347538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75503c7b8600aa739220601b03a09089cde2171548ad8d0cd07935437671eeab. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DGA0P2319425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01f8fa370f5bd26fb936b31f3417834326ea85c19fb0b7a08a9687929ded072. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/CA5KR2426901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9a35ef95900fff1d76b349bca959ac9349165c1a00102fa8667767f9257b08. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF2400925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41fcee236a93c0f52543466774a14c9c392255bad7d8baca3b3911dbbeb5274. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:33:46Z), 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/CA5KR2436333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff64a162485c00b6a4d11a758ac3b04c8faacc5d9e8a4853f25b99dbeacb7ac. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CA5KR2436334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe774e550c967699763ecffbf24fd99d9619b0b701a091375f3f18296cff9a1ab. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CA5KR2435955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bb2b7b967801bc0102cd3a3a329b77d5e3c5cf1449bd9b208994bc2f6e3b6f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2452602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3776e9bf57c5f8d26607bcc49fe7f27102a47d1f15b6c968ddbb8728f19bd473. 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/CA5KR2476520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5874acb5f650ba7ca6c88cff81e7391c08cd500c2a07b06d35c25444558897a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA072467669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6989cc7fd09db0b908ebca788343f6d7902d21044401904187ea0558b61fa8fd. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/CA5KR2489377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f91420ce10ea240bf2b7f0f707b7d0cd5ca0faaa846bcdce29b69dc4bf6c0e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR2490751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79624de541a1b7d1feabbba795e556af22998a5e94bb5b59547d6b60ea59832. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DGA0Q2487045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9563f78276fa0ed70b32170298fc88ee65cd776b51946d675db73f0461bc9d88. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR10S2524195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93c54cd16349bf9797f0939cec60c73953e587b7b5e76550a8caad6b2007ce7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR10S2524196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dd65734179baab208b1ee84d2a9ed07d3f024affd94b2f772787cdda254a36. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA5KR2537385.