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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 0x0142361905542957f7800b9170b4be4489bc973522b3cb5ac87a7e9602d40f19. 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/30738c69-9cd7-4239-8535-6a1177078284.json and https://artists.proofprofile.net/proofs/artist/30738c69-9cd7-4239-8535-6a1177078284.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 0xc23debb6411238f84a318ee7671a69ed898a5f75924bfb27f163d8a0812fbd3e. 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/CHUM71900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e219d9e8e0f3362f202f17d80e5d60c35782b68676b43991c782f657ee9db6b. 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/CHUM71900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570a455d76a0219ea9778e23fd32d03e91997baf294857c7b0cc257f25387237. 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/CHUM71900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50572b5f0a2de99fbb534d927c90f4434f85d42d9a4a1922b42d58769d29bd58. 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/CHUM71900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00faf2dfcbdcd5107603a4702772684f922345ca10e137441a0058b686e07317. 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/CHUM72000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f4023e79619c35c3473107df1149115b708519ec2ce503dd07b6d20866f116. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CHUM72000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849f39a5677ed9bde4b262a21bdd5d61b026e57d657b13c25186677c7519e275. 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/CHUM72200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8ce08a850f3ba8773e7900032c559ea9e4a770dc5e6265d1835b5e48b4a696. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/CHUM72200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fd34c2b3a428dfd37b5d72c46b6ac7523453281b0aa01021fcc2e939cf20cd. 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/FRX872335283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95cb94a0de7a8b873ffa28822aa471f892082b2c3bced970802efed507af689. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DGA062334599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712841c7b5cf340b1afc24cb9549dae00828d2088367926bf29f812e3d3f1193. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T11:59:59Z), 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/DGA092312809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a3fe28b6a0770a05d38492e944c1470eaf3a7bb4b11030f0c7c63c38f47d77. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA092367829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604e2ccbdb2cb9e4789fb25ef24291448a2fe16bcd937c1630af13f70ec86a6c. 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/FRX282478793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca83ea7a8ffa42c57241736b542ae65da0a90e40da76f5b44b3dee5155fddf9. 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/NLRD51632433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638e1533a73094bfd48996b11d8a6f666db325f3bdeb55ac17982e46788efd50. 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/USUS12200180.