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 0x26885fbf33f27164db06d559764b6cf2fdd1f44a34cb74afd6fa1a8a93fd1d6d. 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/82a3dfa2-4801-497c-9b21-182601145609.json and https://artists.proofprofile.net/proofs/artist/82a3dfa2-4801-497c-9b21-182601145609.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 0x7532bfad346e1d72a6b3957ea135edd791c5d51bf2fd8e2a893f34d139c01a77. 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/QZFYZ2243485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3462f4ac185ce0efebbb352d71d3aae78b1385df766d75f0024c9a92ee693665. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZTAY2240107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be80304abb818496b330427118f82fe5a9da967dca5ac6e695e6f3a4f010d23. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:52:38Z), 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/QZTAY2240108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc327e0c0b3e9f9de5d11d2739369583440cdd9b553e5c5b62602f65a2fbc4e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTB52231273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e102751f74d5a90002a9e0994f3f582a2cbccbc0a193a875e7516cca4b01d4. 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/QZFYX2379671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8c60b92dd1eaaecf384f74734a01e97edeba3f6f425fbfc92aa6320a3f72fb. 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/QZHN32321544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3da444f3230fb2587f4a5b0c0fefa75673b9ee744e285b5b5694833180984d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:06:59Z), 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/QZHN92323312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c4a9e789dc4ee4eb04cda8d3d79ca9295a965d09806d5e2b5900cf7f8adb4d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN92321022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acf458f3de05affca4b384ca04e2ee4af5df7c202473fad910b0d5c1d3f5769. 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/QZWFP2344097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb39ad0485f7c8199dfe8670b060e1d5927fc85f08b84f8466e6ad080e4b9c93. 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/QZFZ62460945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00c476b3b857b2ac2b78289132a78bf218bcfedf88b8b49e4d8080427ae7ef6. 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/QZMEM2420418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77c19496b77be8bf6bbe7e50ca5ddee1d5f091924eced3b30623cf53661e2df. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMEM2422119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d29fb6eef44ee8b4bac02b20168c7e5b9c84b3a05d0a247bf7a4aed2141116. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZRP52418666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3cf00b305763084708b8217b16867d9a05336bc751a73e2f1927cbcb18452e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62489025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3247f17fe6e6bad4530c2d7d15e4e91fa87dab346a6993a4ee418864b6a81665. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZTBB2487028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c10371bd4d2518366c8412af6fa5b04fc92628719987d90a9c6c48f02bb6c9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFF2465512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6efd130df618ae3382248751b914c3769065c96fb3a0dc255c95e27aa34b10. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFU2464975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd786b320da2b4d5846adc1a47b4a280ac3c0c6d7465f57a78524ded3097d377. 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/QZZ792436692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72705d2660fd007deaad19970eb2e57a50c5d6de4dd6298400c47084e59ccf6e. 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/QZZ792447507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa8e02a9eff8300239639bb16908c8ca3ee508a3b237b0a7db466addeb99732. 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/QZZ7T2473163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1fcadf7b830b7aae1735c4c51a69533bca80760b4ac911ad053cd5bddc24c1. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:59:08Z), 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/QZZ7T2473164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecb273de30a70ed586291b840da54e8f6d5a9c49b184129435c8b0e080c3611. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN52508369.