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 0x21227dc940d091e993af5fa900ba6e6c4340a9eb36d89c22916c3a1f3b6d30f3. 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/f8aa7051-012e-436f-b688-c031146bc36f.json and https://artists.proofprofile.net/proofs/artist/f8aa7051-012e-436f-b688-c031146bc36f.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 0x0776e52d781c21b94056113107cb0b4442f59112fab1312831f7dcd708eec6b1. 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/DEDY80901249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85654f20eae205d9494e86a7af482f5b85da03de73fd2d1ddf1268471bc5c976. 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/DEDY81101313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ea0588e8fff735d88f9b775a85d69cfe1b54b594108b7d249db1ff2db4bc14. 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/DEH901300835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecf3afc581bcec3991e02d705ecb387f73b27795ccd5e32640b296348726208. 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/DEH901300837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33cbcab0b0f990d7fd5384a902676a9afb6130e2e6de952706b5d8c1f5bdc6f. 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/DEH901300838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bc82c01ed4446838a60b5a8aa816c4fc346e81cf440c0e16940c2aa4587be6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:32:00Z), 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/DEH901500326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5421b32a058b65a5b34d5c09afee34eb66be3eafbd7b7343d171edcb8c774a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEH901500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b9fdb141ae8f5fa894f1e12c6dc6e02a953b7f47bb9bfb7942666bbdc1cce8. 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/DEH901500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a42da2bd0fcc48ecb5c433002e8e3e6dee42df761a1fa20ff7e39c68ef9ab0c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:32:15Z), 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/DEH901500334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20117b97657a9b4a50f2cecf871d5730091d5cf56930ade5af8955393c04b8c7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEOJ51900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f8cb8e1a999b7f7c522bbdf29ee2cef0c06f03552e919b862444f06d3a5dc4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:31Z), 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/DEOJ51900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2612ed6d08590a91f0c8c75a04b4c10e871c2f65524ee25dd876693acedee856. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:58:31Z), 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/DEOJ51900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59f19c9e3303f73c9e62eff225c12c895faee70d8f02a0869fc6fa4002f3fbd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEOJ52401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158d339c8fecf096ef98e62391efad44c9233b48d4a17bc6113b155609d33fb2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:49:46Z), 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/DEOJ52401001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4aeefac20980cfb3f1ac0e396afcce0405394cd46e8b3488742ee9238da208. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEOJ52401003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1b6719c1b59e28864fe82b5e85e959ccae7feba9c589d4cd36d107d8371f6f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEOJ52401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee1e877361667a6c17bda6ba23ff9e27492b602cae13646c06470bbef76a50d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:25:58Z), 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/DEOJ52401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d15d33385b26fd26a886d18d249e68992a0335068b8fb023679c37b209937ec. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEOJ52401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa38607ebf7f36d84be1574add9d4078ade9198155c5f97d54a93bf4f7a4b81. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:28:50Z), 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/DEOJ52401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cdc635a300cbb5f0ad22c18e2fc6baed1e5b2bcc1735ae73f73748707cb43e. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:41:46Z), 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/DEOJ52401008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09897ce97a1f5724a22a59502ff4fd2abadd39f7995b3ce66cc04a22c9d2ade. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEOJ52401009.