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 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 0x69ad00f7d259a6ff5702cc8e9008798de0afd05b6814cf5ca35efb754f51f5f0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e332e83-3f13-4f9e-8c71-d3489c1f56f6.json and https://artists.proofprofile.net/proofs/artist/8e332e83-3f13-4f9e-8c71-d3489c1f56f6.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 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 0x035878a7b133021880e15322817fff8ed88fb8436f5572c0e8d300d1ede88a8f. 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/QZNJX2481089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97520011c2a6f97f5460c7cd3c51fb34c4eac1e0ed68645ed9b6efe50cc43dea. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BCIH82300896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4632f7a0c4ffff80756d67ea5a8fb912400d7a819a068efb6f65514cf0fdfc6d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BCIH82403531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be50a1d820900a772f9e7cd57aa10b04d3cbd65c566ab3888430c194d39707a. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/BCIH82302151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611d135e38252bf6452177b20943a9b15905ee38b8395737a99f684c56c0ae14. 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/BCIH82300663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff47d72d089aeb863b5fc02ea681ccda9b0fa55a950ace98c48ca8fc9239138e. 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/NLRD52258228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60972918fdcf9e6d2ab5533ee96d3f1099b31acbf49746b0a68b6815130be292. 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/BXIV82252623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d974958f3e646049c01b3ae2294b618d41d20db5b19943eeee3428ceaeb1ddd. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/BXIV82227010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e64149facca052042804ccf7900ed80b4e662813c5295afdb334ce9215dc5. 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/BCIH82202518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53e11f3022b88ceaa5bc78a714c0ec45924b9a1094ba5d9e1a6cec82fe2cdae. 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/SGB502266517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb685acd5ecfb8d34d2629ad1f80546cbe15f0ef088cc9d9e85b8a834bc6fa5a. 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/BXIV82270036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb2369fc1868794b3fe44bac21012f88431b96a99229ade31206a7c16572c9. 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/UKXN22294980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233d75fe996150e9d5a24ef9f05011d38809cd79d5b28fb64199e1622a4e3a55. 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/UKXN22294978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb12598856bb84de4b604f8fb494e0c9fa7f325aa6533ef1b23cf80e2ed29e5c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKXN22294979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027426bff3bd767e5fc5c0dbb9ad8d5e4fae6c27ea66dfc4313f709aea350ed0. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/UKXN22294983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414973e5994c5e7adc84038d1d35fbcd50c2a7a53cadb2fd07080290b2111eb6. 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/UKXN22294982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230646f60ff1ff21c26d8d16ec0c1cc5605b82373fdfcd91062dc40620dc6252. 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/UKXN22294984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb20b29a0eba8df74842aebbdd4a86a413cce1bdc1c0466e2fa3b533256a422. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/UKXN22294981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab12eab8b48f0b5c44d520ca736687be6c024bdf8934cc39e42996942bf47640. 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/BXIV82258034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031bfa0960a60f4c654111927a1583013b922b8eaf1cc27f1e0901a04a2129a0. 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/BXIV82261362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63dcd087a5d1c21054859a98c952baf9f713df97e2a63a4fded2e4ebb3abe7c. 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/BXIV82446440.