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 0x7eaddbc746fdb9fdb3f824ce9cb6fe3ce3c14b59608f00af951f2eb1ac179c6e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55def7dc-f2ce-447f-87b5-8aedd3f2a85d.json and https://artists.proofprofile.net/proofs/artist/55def7dc-f2ce-447f-87b5-8aedd3f2a85d.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 0x400a007219591f532b05da11237b3d97bcef714cd13014a93f16a78588fac8eb. 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/QZPEW2411637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe23346afed489489a11089ac8d964cca7772c66d94d623ff72e606ec56f207. 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/QT3EY2471641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276900152802350c98b3f592f4696a31e7c8354cd97cc9243e70c054b57afe3. 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/QT2VB2471228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8411e562cd9a07fce66cfbfb09c54f8f5745691e41044cd2a29fb07736a86885. 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/QT2VB2471229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7da1b0e5d7662b161bd6fb52ec74b6f68835d7d62a8986212f9e3d52b69ab4f. 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/QZNMW2315378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39109a891b3d0ac89aa171974aa257a76de8125294b34722300102b34613516f. 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/QZK6P2195709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe0557ca213839d4bf9a81896020bfb9bde6a1d9f528bd669da78684cfb6286. 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/QZHN92590366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639381b8f0fca20cca506ef71811405cfe3dab72a2195561a2172e808451b6f2. 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/QZTLA2514186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1560d18a05cdc06c68527b2d7b9597cc65633d49e1a5441cb27e3e970bd7b43f. 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/QZAKB2455918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfc3604edfb4343f632e38781c41af008bf05369932ab968091e52ed93ea903. 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/QZES72575321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e07df351f009f96b24ee786128f86b56d3e514107dae1611fb7090b8fa3b72b. 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/USUYG1706750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb011a20a3a9365dc1e44c42ab143e1d3f14ae1dd5e3d97e60140217fe6a56e25. 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/QZAKB2453637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5206f115311331a65627fb5f50dbe5d212130f1884ec4c666018cd50d8edac. 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/USUYG1598549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f426753d5730235c47e386395f0a329906b061a98cc276e297edb0d4153c4a. 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/QZFZ72568818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd705e99ef11ac1b8cb0cfd147c43e06a345a4e5bfed629d0bda8418201c8232. 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/USLD91768682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a469e01d977b436854a907186bff5dbfa6ecd44cea8ac8cc2641df0872a9a38. 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/QT2VB2496562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb249990c9f775df4c3a16bb41356bf1377e3a89fa1b6280df5afe4c0eef9ef5e. 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/USLD91764947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea6cf2043815a862f60bc4184f1ee71ec6e9dc6730a4f2feacdcecce8b3028. 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/QZTPX2428198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe034e573da10873bd6a71bc5e2c0e1275b2c1ff702e590804baa13c8474a107a. 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/TLVEM2400531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd8a6d11333d56ce693393a2a90c0e566ab13c45dbcfa652545dd907cbab33. 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/TLVEM2400532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21518067dc677d68b87dd138c70ce7017da3e21053674d1aae5a91874c211051. 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/USAT22402335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda954df0e2344ec613c5662a90a8f1d7f1c71abcbad01570686a9f38b44b90d. 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/QZWFE2355858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf496be0a10d9cb05eff6e73c3ec9ea24e7c32516d8da15756c418ff8c0319577. 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/QZK6J2084872.