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 0x402297f4c21520e9cdb699002d4c6c436419bb3250a7f24c4d863936b1710f25. 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/40a90bcb-c3f1-42f5-a838-f1f2f2bae5a0.json and https://artists.proofprofile.net/proofs/artist/40a90bcb-c3f1-42f5-a838-f1f2f2bae5a0.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 0x9f21d7b6a0f6de810203cad07dfddc27728e0fe8b8ae13e75d6dc34bbe4bcfc3. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFZ42090007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecccfb3ee45fca03ba77eb543cfc065962315ad92fadc6ae1ed3c664ac481926. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARC572002925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1c64caaf01e9e68cc62e0c9c9b31dfbc1798b35f77bc16e4580695b3d3189f. 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/ARC572003323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadb8f41d30045286bad0a8e96a350080b65d5bb2acdb328fa8bc7bfc900552f. 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/ARC572003515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde88e07fa72936c45dce058754082058528cb135c897ed3dde374d3c7a3dd23. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:27Z), 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/ARC572103016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4583bb79dd0f18e045b4d007a7b912ea50f82079a6739683f46175b1d04cf446. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:33:13Z), 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/ARC572200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b31d74e34b0c994d57d76b267bb256ceb962327411ec3cc8faab67976f599d. 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/ARC572210130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e152c75c07aab57a95bd531ee9d83da9c3b6bb72f79e35e5365e799c57f97a2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ARC572310228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff740e8f683cc8e85c1cdd212628a112c122abae1fe99f4e13c789e820b3ef7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ARC572312351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3aa74c44b55213db1b42df58231407a493434239abf713aea3d8e6752fa0e3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARC572310377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6030d0cd9f8cde053a04f951af841752f1eaabd62f9c39ea5ca1139119646fc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARC572312358.
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 0xab458cf73b2a8f9248529247ecd60e53019dadcd00b9f46cbe60e4cc8aab4a52. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARC572312432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4badfa31dcdb7a49e01720b92c5495c1c895d8febf6c9ae996fb8c41b57406d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARC572406127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c5222f2e7fa5332fce9bcd32855f8f7b85766a87f88a32bed429fdd610b4ba. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:39Z), 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/ARC572406375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48378cf525de245404d3dff383d78fff7cbd2a594cf38b8f5b7aaf927b6a9b07. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:38Z), 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/ARC572504109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1b54b03b78e06df449443405b1deedfa9c8e0ea03815e4fdc61403289ca6e4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ARC572504196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e01c74d7a340a431bcb99d1424073dc398fb0eb6bd2395568bc4770987fcfa. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/ARC572504273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ac5fe817f9e5ad649cb8424edd382cc7088e8d297990626ad39f2010656576. 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/ARC572504375.