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 0x869fcc0d45cbaba040f3a560c69dfcb5c797312c21ae9c8f5f345b9044230f26. 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/18c230d1-91b2-416e-9d68-365a2ab7167c.json and https://artists.proofprofile.net/proofs/artist/18c230d1-91b2-416e-9d68-365a2ab7167c.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 0x70833a8b75fa404f29f82676191e91f62e61d6e38bdcbb4c9636c59d89cedd76. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QZFYZ2028246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb280f9e37d52737f88cc4823ac2e259ad539070f93682264ad09c85884bce7. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZMEN2042657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476a2938179bdbd629f0c0ec60441692bc2a1e208c5d09d72bce41c094076619. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZNWU2068867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d8220d3139c0774d43b63987b1e69704a8d25ee22581d7a2e689ed0113a0e4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZNWU2068869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940a898daf2f9bd24fac839b93d935dc4a8d900c221ab0c6c0ef669c745b930a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZJRB2012498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b21a4bafbc7a1257bde4d9091789ab0d8e186d71ca11e443ac3226c2bfcce89. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA2P2044708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e2b0ddad6acae962df0df5762f3c7c23206adbcf6c7bd1b2867b3cd96e691f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2P2044711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b48bc655b3a1daaf6681346d0a21f4ede22ab4cf134ea3d9157392f57694791. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USA2P2044710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096d95ff52632f164d9c3dc98f675f3c1609028ad257a2c739b5019b35ad07c6. 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/GBKQU2101887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d44c6facce94fd0ae82190bcf6f9bc054c07a0b34d042024ff29f0212d3a2d. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GX3HH2102816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8481984dd303c5f819205b97aa7fbf48a919bf1d69e23e3436880b95119c69a1. 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/GX3HH2102817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b35881218e5102fdf7f4d6fca3f6aa62ef862c499bbc5dca98aac72d2d6fee. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/GX3HH2169695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f99253806f4cc21a0d0bb677bfb216508241ee9a03de38070d1afabccefc70f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX3HH2169696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0746024aa5b2af8f05319b1d20d8925056363f6b62bc004f34f6b498072253e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/GX3HH2169702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7a28344ee8f63cfc03ecac4d324c559493e8fee9292f89f06888f6ecc11810. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX3HH2169703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0be477cdfec57f4a67ea961490c1089f7943a252d753be48af92fdaad6ba6d1. 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/QM3DF2164474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6d416c2aebfa71c7c8791e4e79d917a9fe1f61cd3e42d82482e7a291024dd9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QM3DF2164476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc355cb983182ee00da79afff2c89c2b0de1f6278870b04686518e988ee76dc. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QM3DF2164480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28692544e840526cac942d56b8ad9f7c2cbd4b59821619c3efe085bab4c47f3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM3DF2164481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2953bf370d4c728dec5085c3d8664ed1777a60dc61bfcde300f79b09324fe258. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBKPL2287988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c2ae6ccf04ca2e21704db014e8dce706e1a109dceaea4b0df161717e84648b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USANG2268470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3402fed73d93b2201a4637ba8be3bffeb1be49e81fd8d6500daae79ec28ff09e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QT6EG2554882.