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 0x32382905494c0f7536b7f442630d914d74766db13b6d735dcab5115254aa2862. 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/3919384f-8d13-49aa-b3d9-41c0f3b0b4d4.json and https://artists.proofprofile.net/proofs/artist/3919384f-8d13-49aa-b3d9-41c0f3b0b4d4.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 0x97870f30e14379e637fbbab130c3b602962c38bc750dbdfaf91abcc248905b99. 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/GBKQU2344294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa144bc1bb9e498e7970627b29ee032b1765ac258823c3934c94c9ac527b198ed. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2313948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8b5ebc8b40862f6f8c4aecf9c7443d7c04ee4c2b46047e0a689f58a9fd31d9. 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/GBKQU2313949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0b482b601842167d114ebf9e38e1b6cd82c2a689ebbeef07d0080d5a782d98. 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/GBLV62317534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e00a6f210cb03c65afe0b22103f84a1c49605628bce25e84cda966b4954591. 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/GBLV62039511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6bc55e896b22202a2390643e0186a7cd99a471e55799ff64a74a4d1f8dc29b. 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/ITA061302149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3331f10d5320d04730a0aa3a948633cbbfdf692fef60a299de6b88f36b9838e2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ITA061302148.
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 0x643eed4f39ba72b0b9534ecd52aa0cd2bf4fcb6fac8635b508226b29fc221769. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITA061302821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbedf7885b425f96266fb7e7ffdcb6ce83d388f0ff48da497d7874dfbf23e62. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2506705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0412aa1714ba362f98c360d52c3521e11f3a3c227080aa75b2a17c0eaf57dd66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLV62405355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a1b86bc6bf3717dcaaed5c89596c6764e6a94a0380744162257101efa571bb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2482223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede96f854a48680be2e318ddf80822e0a981252125e329d6a338b47b7cca4e6b. 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/GBKQU2482224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b136db347dcccd978a78e97395f29fe60ec808d04e69211c08445923b74ab. 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/BK4DA2441571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efd329e2f24e69adf078f52e7a9672485e3a4324d9baed9f0ca8d95e0d3d381. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2467988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e9d65510b138ba543f2099a7229c9f8fdeb9ed6956fdaef0fadba8b4a2cdab. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CA5KR2467989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88a8809b51866b6773a1f96d38916a1489010186d9652fcbb3ca7028ae439db. 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/GBKQU2431546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4253a51933be225b40cde06f5b0b8668c619c5a4303e1a51cbc532484ab16a. 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/GBKQU2408135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c405590cbe6a4acec9507649e21027286fce33a96cf39c4e0a61b9a767d21ac. 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/GBKQU2408137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74a3c03da65dd6e36a5c4c45f20b16d76a94a5dfb913cef4411979c22c3320. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBKQU2408136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232e2633f1efb897cd9b9a0ae5f6b556d79778dfc890643d954c2c3aaacffefc. 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/GBLV62317536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c74797c06c92455abba6851059d3829ae27c66b740fa76ea64312f2c0f07ad. 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/GBLV62302299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3577aa333334665f121e8585dfd100930180b74b5fd480d585e17e22ecf68109. 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/GBLV62302300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a27759be5552893a0538d954fe194e6a0d0999491b0345e25b5f9ab7707fc0b. 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/UK74K1400737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f38a65345c5a2dd474f2ed3665b2ee336ff552ec14385513780cda100d74491. 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/UK74K1400738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee645c8722e6659363082473003b6102f51017c89551b6ef0c706292f0728aa7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:26:33Z), 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/UK74K1400736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bf81ed2eff95dbf63e183ac8fe8eb6eeb657b7c590270a4fd42c2eaea68555. 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/GBKQU2358817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bc99d08230782b612939e3ef560c5cfb4ec563a77796e28f50da1fc523b177. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/GBKQU2358818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10c300877fa41d994e0ce7a3e644ce9f4003fc6861b355e1e26f17c38ee56ad. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2344295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4152500e574b2394af2b6e0d638adf487fe8bd553e911f64aa4d4a4c740b662e. 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/GBLV62215911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd779363417aff0f33eaa5c728e37b45c0e3cd64fed7802f19c008ba2cca6a63f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2288685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff02093197ad3ad35b1963d2ec2cecdf967ed6e5aa726fa852df3c6898e5f65. 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/GRLP12222253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcb8d1a282e3c911702d224b008a268b6527746bb3a56d10d24d6ddab100c9d. 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/GRLP12222254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464aa5b6e9a62841dceb712568a68581eb06805458e08d37f8de452bd4538311. 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/GRIV12290683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb538aaeeae3ebcdf44a4965a6efee760a1e39e33372a676c2fb40ea5369afb43. 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/ITBHZ1501106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf864c813890d4ea63326fb7a34ba5fe6ff740c5373014e2887badf8e66c133. 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/ITBHZ1501107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0665a20a7733f31c9b940d974ebf4664c036ad22d65c555de9579b19c47ff29f. 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/ITBHZ1501108.