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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 0x67e73246090f9deaafb3a0ac075ba333292f2742937f69f7e33217d97343c58c. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/306f1b47-50c4-4f5f-8909-f5aa69be6308.json and https://artists.proofprofile.net/proofs/artist/306f1b47-50c4-4f5f-8909-f5aa69be6308.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 0x4c7dd7f1eb99137eaeb0191f35ea48da8f5be8910b9822a986c53798921a2977. 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/QZHN82210602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6d6433e26fb872a261a955bae883f58c1cc8fa027bfbadf6f84d15d6b38fff. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZHN82210603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5335f8bbab69823c5f79aae2b82efcfd688cf6eff72153a822a45ccc951e668. 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/QZHN82210605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccb4b31ffbd19464573e4928e3067319fc9023d0c74b8eef0655bf9ff9d57b0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHN82210601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6cb3a4ef6d3e80e32f46ed794d99afff919e982d70b73c7e291db611255019. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZHN42213966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35e59fc9d1b1a20a57d54b144cfee657d5511a4c0ec8c69f4422f91d77a858. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN82210606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52feccfedf1d45ec0201bcb12979ef3eb5317f5f9918618158fb5b2a8a6f1178. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZES52296873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35842fda5cf3159258624d85dd1b97c7fb9ee9ca130b32e0e1e915ea78f18dc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHN82210612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf981d23a66a35f0e2eae23e839e62417a1a00be3cfe1a2b123269f3374744ba2. 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/QZNWZ2216922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0464ca56038fcf7fe41cfd2a4ae5bb3047139c95d576c0b308a25b31c4cfcc9a. 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/QZNWZ2216923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29322eabc8d43b597566b3af995de1ed237a0ce7e96a23a3f56aae05dc7cb1ce. 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/QZNWZ2216927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabf5cf66fe704a7dd3d084f11ba253f7db1f26dc8871295c9e4864434a9ce2e. 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/QZMEN2265383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2bcbce1fc78f5c1be0b73db6e06b96410dc2dd3496a0539406d96210704e94. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZK6L2290243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0118f95821cf438b324ea7be0fbf13f1fa124b34e12e97121cec9e7d878b5f80. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNWZ2216925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02800562f513e226cc4e7321d44a7df76352fadec1b07bc4832f0b30c5fdf799. 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/QZRP42329127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e02ac846e210bfcebd125c3873adc87adafff1d55c2c4c8ed115b101e8b0088. 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/QZHN92353567.