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 0xf2c412868937b1c13b4237be9a82f6207de39ccb9095fb1ddda724c2c546326b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/971bd65b-ae30-46ae-88cf-00e482fdafba.json and https://artists.proofprofile.net/proofs/artist/971bd65b-ae30-46ae-88cf-00e482fdafba.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 0x067ac0dd14c7eaccfcc17e680e0408adbda75a05af0444ed35ba91650409a4f6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US7VG1976566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48ba7d9975018d917d0b8535f6c1e48bc49025e19be3a9f90bab44bd4370d7f. 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/QZHZ42019480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2f5f302cc63d0e1d7f7af33615479b584b5a761bd889a9761c6fc5d24412f9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHZ42126397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824e9d4f053a00490c4c8a30b0ff5b486bd3d07bc8188cc0efd5eb13f293ed4c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:28Z), 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/QZW9K2352270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7fe62497c7286f6af0e8b6ddfb632de9e8e6d4a2a0fa888ef82c0eb44041e8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ARD632400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3fe4d01e619a7b47ae1ed37b9abda226fc55af68dec3fde2b52b27e8354926. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ARD632400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9058864065a5a9072ceb45855da8373a265d87f107d824ac80d5a19fcdfc358e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ARD632400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db2c3e46c97352b39d4cece694781d515dc57c4a7cfc2ab5679e82abd1f391f. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/ARD632400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96e58b341d160bfbb67cab66a455e386dd9f32c9a96d206e562366275218e8b. 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/ARD632400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d1a6e36f40e99221a22e8af094d6b1d6f4f96a36c23de310994e441744f0eb. 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/ARD632400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc846e921fff55edabd16bb833e68dba69580cc75109c448225a2863e765a7dd6. 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/ARD632400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab838b125d0d53334a128cb95f4ba730245523596435f3680d4cafb5abf51d3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:39Z), 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/ARD632400004.
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 0x6ffd4b38fabd99bc4040e4fd6fc485f19d3bf84e7ff70bd546dc20f450a43b90. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ARD632400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4746c02f759b3be046372e70bbd56b862925a19c12a63e7b8e4291d4afb29db1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARD632400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd7ece3aa00e3fd9e7488c01cb105afb95c7e77e08906d61ed530637a71965c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ARD632400009.