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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 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 0x21bc03e375b3f8a041879fc1f431c7e806b44870005eccdeb4b6c3aadda2f297. 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/a619abf3-5b54-4525-a016-10e94331197e.json and https://artists.proofprofile.net/proofs/artist/a619abf3-5b54-4525-a016-10e94331197e.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 0xfc9e824ba8339d09dd25e1666a75472561247aa95481d5a68086277571ba1450. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/MYLE19900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e69f109ec0f05216a98c49c30b1d8a2a56b89ea3fd1999de4724ffdcb6d4e54. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MYLE19900135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba4a7c7abf4841c0fb3052636df6fbbca10d5d6df28f516b1f848a85266936b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/MYLE10200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0de046ccc011989d1a89447238a9f08022ecfc0f68a4083c83f8d1fc019194. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/MYLE10200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d978072e52441e631a33c1c55e2255c30097ace5c084c2d74a62316eaceb166. 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/MYLE10400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c07cc6d9f0ee17b1b17dcc61c6edf7ac603e3279ea9f0bd653c1f80c8a35859. 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/MYLE10400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e5cd4bb1a362599d8d91be809856e47b29554a13d7f0ea9affda73956bc169. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/MYLE10400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0802a237536d0cf0e6c81b1231095ce641597c342d80aa8ae7d0480db3b97f. 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/MYLE10700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a9c7f7665e489e69b186aae2d39d526337df558f3da8f083b195a9c01a1bcf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/MYLE10700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa62f50b5830cc44ba979d23bf7af155e461ba9dc7f60a0044ae151edcd1ce55. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/MYLE10700125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1adcb21a2d7368bb497969567db5b2dd3c71955bbb6f9252a39b759fc0c9c4. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/MYLE11000400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7755200badb6ce2facc7b9b00a2e5af310f64dee91b4235ed35c33441b99df67. 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/MYLE11000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3016a4792dd6757d07f74921a71c388045d8ac3d1b5f73d113ee06c922a902e1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MYLE11600572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c510a83a0f477152a118609e0e6085cd0994f2ca756944ad1955e189d92c5b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/MYLE11600573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201dc9f40ec175bb096933f0eb9eabfa859f83015973e728059232cfc7278ce0. 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/MYLE11600577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa24f72172d89f4393c7d6499edb27d7b1b440c13dd2d16ac5d0919162db022. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MYLE11600574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bef2617585d348ccc3dcc8084e6c7e7a424bd90f7d8268aae5961c407280c6. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/MYLE11600579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bf0406a93c2cf57b4ed6ebc58f74d487658d05151c323b84741488cbda1dbe. 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/MYSN12400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8455cb93bfb7fd5e0a8b7bba9ce451400128bcfad5e9519fb0f1f89015f68f. 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/MYEM10500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8455cb93bfb7fd5e0a8b7bba9ce451400128bcfad5e9519fb0f1f89015f68f. 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/MYEM10500053.