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 0x5c2bbb730cd29312af3db91bdf0c57b10dfad64b5b5e58e08a52969214de2c5c. 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/cb84adfb-0f86-4860-aca8-5ca89959aab4.json and https://artists.proofprofile.net/proofs/artist/cb84adfb-0f86-4860-aca8-5ca89959aab4.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 0xddd498bc8af3de14018fdbabfa5a9c0aa5d96923941b4b6086f6fb62d9d16ff6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMPKX1810992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46823541357f02b72911cb00ee4f8438657b5bdf1eb8ba62a719f4181767e88. 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/QMPKX1810993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55696e483bd2bac409d12b8633705c478697714731e282bf129bb19c03773dac. 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/QMPKX1810995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3279e7eb8a67cc6b5c9c30ddc8514238653fa0c8770096f084d623e1238631. 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/QMPKX1810996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4a99ec7477c5a79ac4d7ff9cee768e7556f6508a03de83a67855fd61ab757e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMPKX1810997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202941c8d33f608136e2dbcd4b62297ef71f42eaf079143b474ce93092199117. 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/QMPKX1811000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b360968515dc9e77e3c57db98ef7501ba3747bd271807926d6b416d936a02. 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/QMPKX1811001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4bbfbc59ef80fc626f2ebc721cd3c59851762c15489eb4b2676a84af09db35. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:36Z), 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/QMPKX1810991.
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 0xf4d9acb421a1625bf3e35eb8447c7259c8a6e6a2809362837571e170534b6800. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMPKX1810994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc2f396fdb9c8cf5975357129b7145050a83a079242291c6f51db6e8919da55. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMPKX1810998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621dd398e1986d3755741af3703e0ce4257248eb7946c5bc7a1579be70a404a0. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QMPKX1810999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ea8416e7c9ec8c40b8692890081293776f37d359b1ef33b236617404c5dd6d. 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/QMPKX1811002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0927d7f785843ad130d682f77b4671f6576d3bef958373b24135d346e8b5aa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:05:49Z), 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/QZDA71905906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcf950be3118c1599a99c97d297b9174f7dc9b31497f1b09be4808ab778d6f2. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHN41950532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f0d39432733684b4509c5f7ed1a9fc60d7b2e039f0d75f764ae395a0c078dc. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZHNC1958384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6186208728d0bc1891422472821e3cb35f1ab0fb6ab645fbd8aec82ef7fae31. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USANG2057708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2b93db567c17d479ed49aa2bedf0bc1cc25e8aedea94bf576f57c58f7821de. 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/USANG2111166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570a6fa6d3b509d0ebef06099bb33429071e12d414b5ccaf19ff0d87327a5ddd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQ022100336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd218415da3a788befab2ccbd7579d2c0cd0bfb67557eaeee9b3355be10a45e74. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF2243595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7ccf8f185b1f0aaf85e292ff7dbbbc5dc41f23f4802712eaad5211854d710b. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:02:44Z), 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/US3DF2273540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fead120926279e2f37aa0e923a5ae252eeafad1cddaf80a09c35fabab8d34bb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:44Z), 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/USANG2217705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551f31ef14003250085fc104c8e95cee39c9fadd979ec0601da6739a15813669. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USANG2275415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f02ed7a5f2700d207492ac5aaf50cffab4699fd5a65fd14ec77b7f83a132ce. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US3DF2453711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8732186b8d49206ce224266bfd5f3cb8a4131ab197b188731974555b8130ada. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FRX872464946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02da8403df1eee4a717f8865f0e4a4e42c1809cdfb8f7fba6cf6751cbbf7550f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USANG2437321.