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 0x66017f1e91882901a29d9eff74bcc84e8f3ba8406331180c4304b78c39f0f56a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6e47aff-bb70-48cb-8696-9abe1d044a3c.json and https://artists.proofprofile.net/proofs/artist/f6e47aff-bb70-48cb-8696-9abe1d044a3c.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 0x162e11124afbc83ebf55660d828d99c018d0c164ab4fa6078421ba3245c898ca. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USCGH1547367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6326f1f8c659f164ec8cf520a6c7e703ccef7685b7985ffcbebfa306ff03595c. 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/USCGH1547368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06258e539f20b16fe3b7814ed3193685a12c0d54567f1c76fa2e2bd20af937c8. 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/USCGH1547369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f653cbaa40cd67b71d852bb2cfcfb1b26ec65a982ea4bd9ad4a9f8a18ce9f8. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/USCGH1547370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc9db0d572ca8b594088eb95cb44aad29463cab0cfbc8553444d9ca470799dd. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USCGH1547371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f897449d52279704ea4f1e77f19a9a462a2c1c83f6b0b5557810fa646e7288. 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/USCGH1547372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad1d6af24a8c3ceb24a9df032f5fe3a569f08fa128f742c1b82cbde63f1d9c7. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USCGH1547373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5537cb277e951cd2e2ad513f0b4c9deeede8799b82dfcf545660f8ab6f303c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USCGH1547374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4b49f08d43d41dcc4652e72df9de82508c6d31db36089bd6923d914a7512c0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USCGH1547375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543c90e1e3701c5c78cf9667979c7ad794d3518d9841e157ab2c1dbc82d9ef71. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USCGH1547376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1940335fe458d6c51a599fa73c1120f24fa0a18e655f50964bec8f2ad430efca. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:09:55Z), 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/USHM81793685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc93f0c0ca3ab186baf9ff2b0bfd171237ae202b175214d10a8679b134d23f36. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM81793686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad921ba6083bd0d7dd843c80d03583c2ef966ebf1263204ce5d80ff5745dd1d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USHM81793687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356b6bc4b171b675e9ff7b0f64ea52f37020ed1be07f6f4fe712d9371fe2619b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/USHM81793688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58ecd0ecb6df18268b968b0dd6334cdfdc1933606e60f1d29a14e73338311d6. 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/USHM81793689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39eb421f5de6c60bbea06ffc38a91c2c9f5ba5af87ac2f59343fe8141393ed4. 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/USHM81793690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e8ff53078bda2b41748296f5f801e0cbb199bc9d315b8f11ffa2306f9f559a. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USHM81793691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad5dcf6b9c4db8724367e4613ea8e094cdde3d28314facc74b7069038a9075d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM81793692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41805e7e68602623348b5dfbb397ef3e78959a0c21604e92f0401ea115282546. 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/USHM81793693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf725b38c409ce99ff044f2c7d7d48f9441dc46949c8ffaabdf32b63f84f3a41e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2432895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8779975ecaa928aaa335c585e02439a1fd95986ca5542e883b3e2ececc9471f0. 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/USL4R2432896.