thumb|right|250px|Topography of Iran thumb|250px|Dena Range as seen from South West Dena (in Luri and ) is the name of a sub-range within the Zagros Mountains, Iran. Mount Dena, with length and ave
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 0x5122841f5bc48629600cf4cafc20a3e6a7d09e0ddadefdf406ed5a4cc6217409. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22122cc4-93d9-495c-89d5-c3709796368d.json and https://artists.proofprofile.net/proofs/artist/22122cc4-93d9-495c-89d5-c3709796368d.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 0xcb9273c28628daade6bad41f6787fcc827b13afc3157065a7f05907c43146c29. 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/QZDA42225498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d9e83c84329647fcb1ad453e6ddd80488146197413efef1180ea21404f386. 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/QZDA42225499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408532cfce5da7d22adf11762613e6d479d3659612f8066800910c55da449170. 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/QZDA52201926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5682b5edb5be94d38eaf610236a7c5022665e9538e04044223d1d044aba3c3. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZDA52201927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051c448379038307b4e39f815da5b3cabc06309d54b1b7dc9e5715303e68a711. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZDA52201928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1569a99c8d1c42888c36ec9af79237d916dc6567e85c983b36711aa3991d3e37. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZDA52201929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61807bd8c8576247b3a3d905f1c1725a173e0f75cd7425fd3eb39120e94ae9e2. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/QZDA52201930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0226aa4e4d8010b1196639ca9699443f8160219fb5b2531def6ae97b88ab9b8. 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/QZDA52201931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215fb439d15d00fa7ba385fc2f43b2eeb6b5f3cf0d695a25dd25ecbf9e000edd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZDA52201932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246109da12d7e3ae8309b045ad5d7aee61805491daf9a7f9095c17c0c06aa477. 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/QM7282084582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7993a54bb951ccc65f2dafa307036d98a48db84ad5a35f876d3e3e8724118eda. 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/QM7282084583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e35720596abdfc2743f48d515c8414d553affaf0bd4b309136459c5beb561. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM7282084584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec9b3ce82e54eaa72ed570c95ae5914f597c7e327aaa3c711c0c09e898ae17e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM7282084585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12838652f6999bb54bb86239173f0a9ce8f5290e2f919464ee7a44ce81a41b42. 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/QM7282084586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a45b55a5616dde12a24af8448e0468ac9dcc87e75e2eda329e78cb483da455. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM7282084587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011fa5d410ac796c410228b4e852689e97f15cdaef37b602217e1deffc753abe. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM7282084588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44728a4ca8e5d0f7b40981818852ea58b85f2f754d99779ecc8cb1f1d1617734. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QM7282084589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc379432bf3739dc0e778d4a8464f65116407b63d9ffcbb06c209cb526d1e0f24. 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/QM7282084590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d79891b119fb0f60abc12509192a458584854c50254b255b45f07e105356c4. 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/QZFYY2304422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d9e83c84329647fcb1ad453e6ddd80488146197413efef1180ea21404f386. 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/QZDA42225499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9273c28628daade6bad41f6787fcc827b13afc3157065a7f05907c43146c29. 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/QZDA42225498.