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 0x046b66f562a9ee4f37189f191f5ab02f8c29da7d133487695240428502502f00. 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/b3c24336-a2df-4490-af66-c1e2594dcc43.json and https://artists.proofprofile.net/proofs/artist/b3c24336-a2df-4490-af66-c1e2594dcc43.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 0x75294d3572aa091bde06372e789fccbcf35fad06fc7abd911e0f5c94abf4511b. 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/BRTRB2027899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaf4298bfab309970968c9573eb2179dbddaa2ac51f7ea326aa8619f20e8649. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:39:15Z), 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/BRTRB2069458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f412052de95d2c0db9c1151e6ca8fc9b7ae34ebaf8367ee97e31b47f04510a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:39:33Z), 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/BRTRB2069461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf3b11c3d833781bb0110e067facc23dfd57f97b93f1797f0ac3893c1079ad7. 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/BRTRB2069462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fc8d2fede02af7e33f48e836978f4087dab94d2e744632083f5ee760e50bf1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/BRTRB2069463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9395021c5876b33ce53c3e8d0b7190968454edc3061cc60589c1ddbbe1f2e8b3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:43:17Z), 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/BRTRB2069465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeaafed2b5713a940839d15e8dee5d9bd20afffbe1d16f1af96328917885727. 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/BRTRB2075336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc3e8b8b0474d1b8e41f283f3b2d8ed2d7879da5277d4dd258787a04a4124b3. 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/BRTRB2075337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d8e891ec3dadd3722ca53168a974ed8feac7ed526dd8f4c6f467991db65b9c. 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/BRTRB2075339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552684df7fbb7b0e2a222b1d7c3100f3f74f5f27993fe6f30ba9a4ef90e6c410. 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/BRTRB2075340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0f85b85869d8ccb7d65dc4f7b60dc4e47cc9980aafacac7bc055dacd03e0a3. 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/BRTRB2075342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b9634e745923b8b2f516ef1d989aeb19f2bb5d776a8e951d3f4abe8a4bf771. 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/BRTRB2075344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc6bea6ef30917c483d1138e33b4d262592759fac8a6dea3f42b05983e43402. 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/BRTRB2075345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744bcadd3bcd158ee9301a0b3197cbb8c64be7998a9cd33f3b87de2821b03200. 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/BRTRB2075346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70f222cd7d4d24a395196ef575d4a1357300be3e6315f4a559e7dd66168378. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:21:19Z), 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/BRTRB2075335.
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 0x6b4df5472e31883610cbfeb78f94ed29a7eb60cbe10aad0b9b20c30372a82b7d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BRTRB2075338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00835b3b4897d0af2861b223ab81ff29c80883f9e5ae3cc117a8edc2ce019f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRTRB2075341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8085083e4f35c7bfcacc47fadcb9a6033383a38a0b34c7b5d820852b30c3a84. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/BRTRB2075343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7d9800469a758dd1f0d4ccc9c451c0494aeaaeceed610ea0bc61b98ff7bf1d. 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/PEZM91902580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ac04dee8f5b0b0532f78781a5cc29bb70edcf195f3ef9b00ef5be2249490df. 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/PEZM91902569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b1a1b77906c6861332c863cfedd7d6aba9810d02cf417b64008ba8a020d19. 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/PEZM91902561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb173b55f26babcbcf3d1eee117f0c3600fd42ece5830bc0b1701a813963bb30a. 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/PEZM91902571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe144de7fc212b6a8a72c9b8683fcb3978c98d73802d67a744c985d0cd7a5b8c8. 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/PEZM91902579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b3b0b98112953d2de48555d269ab4eb9eae6c9b191b85226e15c2f0942275. 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/PEZM91902574.