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 0xc05ed88e856b2f91decf2af7462fe2a48931cd2af81b65ee724a36aab0ae1f49. Chain 2 (Bitcoin): anchored in block 953857 (2026-06-15T23:34:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/027d5666-8d81-4daa-9646-57617298e9d2.json and https://artists.proofprofile.net/proofs/artist/027d5666-8d81-4daa-9646-57617298e9d2.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 0x09af47484dfcaecc6005486fe7cacc37f55b0de9f15f20ebb951fa316cd7df1e. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FIBOA2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a02747f8d546d0ce3a6b86eb1d9ed18e734b37b86fbb89f9a35e3646617226. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FIBOA2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f131d9f3ef1d3e27d3a16eba98e34c844c37349e77a64be170888167f058ef1. 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/FIBOA2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84c78a5d6d24bf0033f7ec0073238e5336f7a646d68fceb3c44be5f18e9f93d. 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/FIBOA2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c65e270d676faf5fdea0c59d7d2e97fbdbe5836b04cf970107f57e99a56781. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIBOA2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb294a40a739df4c734c804cce866fa27f745d4a650e7ab60d6f1d62c318415f8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FIBOA2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fbbea0614148cc21d3394d118c5786f332580cb72e128a208ba4a5a9dab7a2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTBB2216673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634e7c71867ab7e52a4ea4dfa399f54921921814cac288111bba080e13c849de. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMER2214758.
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 0x4c7dd7f1eb99137eaeb0191f35ea48da8f5be8910b9822a986c53798921a2977. 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/QZHN82210602.
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 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 957118 (2026-07-08T03:20:19Z), 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 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 0xdea0f87bb6de1c6f301998a394bead5e66d8598b81bd3ff02a0bbeba18c7103d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52275431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f8d795a86e53e55812f15a8e4caf6cdb4c05ce0eb2daa944cd22dff580868f. 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/QZHN52275432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae43a98954442f6438c6bb18ffda959618b022ee4f523ef40154b5c3169863f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN52275433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc100405aa965257d52bd8d85d89323606530987a99768b2d00eb1fadbee5114f. 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/QZFYX2264786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ebe39d4fabccfec22726bc6b28e6898f3fa79f23c319b874f29c86319ef28. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN52275434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a8b3f3f705aaf9fcd2560859e5fc3375a98fc0451bbd4b2a55b43daac109bf. 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/QZHN52275435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf981d23a66a35f0e2eae23e839e62417a1a00be3cfe1a2b123269f3374744ba2. 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/QZNWZ2216922.
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 0x0464ca56038fcf7fe41cfd2a4ae5bb3047139c95d576c0b308a25b31c4cfcc9a. 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/QZNWZ2216923.
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 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 957118 (2026-07-08T03:20:19Z), 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 0x7405ae1a2f398893c7bf5f29550540e69c40a1cb53bd7cab90511a6a2b93b6ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FIBOA2400027.