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 0x0a8525a8dbe62b40a0afe943eef0b63fdd7187ebbc3e088af9e995c72e35be3b. 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/2c7e2500-4e14-417c-973a-d1463ac8bdf9.json and https://artists.proofprofile.net/proofs/artist/2c7e2500-4e14-417c-973a-d1463ac8bdf9.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 0xe67764af762dafcbd9f734edabc30e87c8c7e17f0ee61ca82bc06ec840ac5349. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFZ62378238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c6d34abfce1d4f15806e2f2a2b74dbf969f93055026ff5a49755db70813d3d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:33:10Z), 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/QZTB92294723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047423c5b836e8e7141035e2a4adeefdf2dd8c149988272123db7ae4a1bc7674. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZDA52360508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbac6ef28f3966fc1c9f14933f7e8fd808cd1589e54373b57b8e6cbe51cd448b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6F2367978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30048b19eb0f6001da79c24158a45eac97a0f88722d86855b34fc3f6447a74dd. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHN62354482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ede1eacdbc2cc8d0106b78b733ae1afea25432237dbcfa41c968a6321e4987. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZTBC2349173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f6a189e870df471e54874712b320d242a8bea81e23755864e6fdd6a7ac244e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ2420209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b704d596dccd3cd1a85f1452568f8066d45cefaf6d9ee29a8766557709ff881. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYZ2435367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434ee45e82de7dfa917bd632a71bc95b5faeec3b037b4638acbe8b4c20f356fc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA82485336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdd78d5be592b052e5b7bba79a51d50996781c6d665565f30ab326077d8a5a8. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:30Z), 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/QZES82429827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6d45dae705266632c43b759ead8343f724e9d174854adb8b7bde1f4801a07a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZES82429829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1bcc1557ad37fba1d4abb8c55d3f50130ca477220d70dcd4ae3c1bfdc172a6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES82429832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3dee5cc405ba32e18215a79cdaaecf39a81f02b89e9183f96af5b4bc6e78a4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFZ42566169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8d5aaa8fbd12518b09af308d72879d79103b5bc99fb374249b01632c51e932. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6L2548068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacfeaa5394d20ba9069bf184bf6f9abed4ff6490d210bcf7b5fe52e958a48a7. 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/QZK6L2548071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70efcfbd7ff053eacf6cab18e446bc112affee11313f7fb88e534724e47e3d2b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USMH92388897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054dc118ae15259a3f12aa23704c28f2fa518c25cfb13785daa830b91ef2bb17. 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/QZHN62398215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02724cd4f96450d63309f82cf156930fe352d8121b8fa03bb177937b2e3670cf. 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/QZK6J2439339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf11d416cdd491e2cc1baba825d966517425e79fac93e49c81cd4e5a0f6fd67f. 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/QZWFM2381620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8563c4a956f83ea484ba5614350e3b137c1b213b309ee497e05bdd0f01291951. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTBF2385487.
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 0x23a887067d06bf0dee560cf5e1047bbd8dc29095d9d7695cfcf7fb01f781ad12. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWZ2360205.