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 0x6df349c710383a70349841f861073c847d2b721e28d3ff05d340f702a3df93d7. 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/c7458ada-368c-4f50-8a10-87d79a441ffb.json and https://artists.proofprofile.net/proofs/artist/c7458ada-368c-4f50-8a10-87d79a441ffb.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 0xb091d5c3bc10482093c461225fdce7e8908f2c14d18e425ec1e04265d7c26803. 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/BK4DA2426100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d94ff520b9b6c0787cdcf66571dc1d3452588fdc13c7fc8e3aa22307dfde2f0. 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/BK4DA2417001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845df00f3d7089b72980777d79fc7376bcef689f47dd0469ebbf0fda1272bd21. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2412017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c873ad49f15f1de947bf64783825ff72b3dbc1951ec7e923e6eb3207b0dd9a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BK4DA2409791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1845c8b0c1e4f69af30d1c0986be8f48bd48c07fbf6ab2644de2c7ebb5d08de0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4DA2406649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ea4061d014416a0ee84c001ff699dc0842477c2e3e0fc9aa3da75bc2f1d88f. 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/BK4DA2400565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638a8974e2d53cfa8bf9c4bb749444e8cf4792a25924ffa00322120125dd5df3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2321664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afcf323936ab59b16b27aa65205a6979b1507232f155bb1cfd09f6b521254fe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2315989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f2b6f9de8e16715d146f7c2f3e5aa1aaab398550bd2f88636a288aaa208a81. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2312876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e61e17a7d49d789a35881f5ad9822155e05422c51054175a1cdfb848d639159. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN42333068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85e7cf1d5051b00efb1ff3c615d23d461c6fe2482e2af5921f02e359ff1ed0f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB72295260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff59ce8af80a7dea6283bd0f4e127a6f80eb2e7d970d3608b63bbcb3431aad0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZRP42221784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d691271f13cce56b0734116a0303d73bdbaa92bf01b077a8399d66470c19f4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWU2284273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23f6ab68e033fd307b8ef0a0fc09b836f5a88f980eec42529d5ef4bb7dcebca. 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/QZHZ62252649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9488a83f5f00e3c6fb7e1057d6d761b3b9b8454c92f878b5715fecd69fcc2864. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN92059970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7a99d2318ca868d5cce418bc442280d6f7745685eccf0e3c069ada67b82f3e. 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/QZFZ31995214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f213da3e18b454ea44f9c14b5762fceb7813b06ba23216d6f6ab66f2d88913. 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/BK4DA2314244.