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 0xc2e3977b7a674e352c5b91fb1029a5d3f438f6809ea04a06ea5250a2b0743217. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/254f01cd-2301-4791-bafe-c7f0fb10b008.json and https://artists.proofprofile.net/proofs/artist/254f01cd-2301-4791-bafe-c7f0fb10b008.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 0x9d856d271799c1b9f5329f6aea2fcf672019355840eb6bd0d5be7abe5d15e451. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:59Z), 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/FR2X41810475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afe9343f990a1bb1806591f85012321814acd1916ca9262ca630fde9f781117. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR2X41810476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1621d4f88fe0a93f3c3523eca7add2d339e7376b1a86d36d6073a734839cbebd. 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/FR2X41810478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01d71e1fbc06efa0bd7e38235edfbcee932e0cd65d2ead199a05b7247095cc5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:05Z), 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/FR2X41810483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94c15222f6dcfea81d3d3bed656860e02f648b553cdc36afbe4902894fe1b89. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FR2X41810489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc7d53bf4ef6fb045b2dfc4ba6e8a18310920fbec0a07e1614e00b2e066abeb. 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/FR59R1889398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33697e265b4821cba49286c833b081878b8922ffd32485263a814ad7fc2159cb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:17Z), 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/QM6N21902658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2742c1769175249dfdd804ed00dc3a9a3b448516c77809a39df861e390a8db2d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FR59R1986899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75790ccc67596e5ab9faa65ca3c87fe21b3774206b577ab94f73644159b77588. 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/CLAA22200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba678546addfbfa1139431e067c91bdaabe35c9652119a31b844fb2eb7ec867. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:31:58Z), 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/CLAA22200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c50d15d8a7905020dce6feff5bcf00db70a36be09fce4f4ee45baf147045fa. 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/CLAA22200180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc351d61ffcd4c5c684dc1595790f4871c5b458242bdcf60db40c5603367cf995. 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/CLAA22300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f445f36a20ad13ee11d980d0bf95641e21d279582e14dab145f0bd35a0d9b. 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/CLAA22300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6bc4324b8eae995b715a9297e28208235634f1cf6cf1803bc6ffac1cfa79de. 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/CLAA22400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9307cb4f63c5ee0e66b1cf8fc488692c0a13538749ac99c16f6a189603d1ed. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BK4DA2305885.