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 0x74e8cb91a5423588391e569aaefd62f835c6ebbb07e3062fee75ca317a9c0fbb. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/887e5607-9ea0-4340-a117-2230022de992.json and https://artists.proofprofile.net/proofs/artist/887e5607-9ea0-4340-a117-2230022de992.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 0xb3be4d46cfaffb3ff87e7e8719e3f7359cae4f1ccccb1b5a5f9e83bc1f59ccbc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEYP40702501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592a69d1318393b871a17307ddc68ff4430b5743800cae4f9096ed3c5e2bc596. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEYP40702502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19747f2429f614fde29636aee21958a9e16778e64ef66c7409190c6ce030614. 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/SEYP40702503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82630181cc231d96ac77da2ccc1ab345421be347f9c7c77737b8664c63b016f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SEYP40702504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd8b642cf81b7d15d371deea6ccaabb0a7ddb8d1c6594d040de6de82f853a23. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SEYP40702505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1899cb8039db0c4cf715d67b066f02a2b1daf5e8123d95b2469f241dc5d2e76. 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/SEYP40702506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181a22cfb05a7cae78c4362769224b63a441fdfd32c082562b9d86e14b74505b. 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/SEYP40702508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6330c9963a0005511dff9e77ca639990aee0cce7f20e38baa1cfef80a5c33b94. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SEYP40702510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ed3ebd4f0abbea38d57aebef4537159919adaeb1da40de9821f16dd9bcf606. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/SEYP40702511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f47db8b3e7c91d5d913a9cb9b12401a7f6f41b07a3009cb269958cf0d437f2. 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/SEYP40702513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ff43ede79a6c0eff0a9112a57a91f9b3d886f54c68b7a855a9143be032d849. 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/SEYP40602001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeda671336f6f29ff7b20a23e6014df9e0b16270cd3081be1dd135887400385c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/SEYP40602002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d80bb8e3a02396c3998b3804b9675d18a73d88f24760b632c25eda830e92649. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/SEYP40602003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab73be19f68ce9d32218be13e51fd0a667b5046c1d6643728a7704af996747c. 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/SEYP40602004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1ad42669d9c69bd4d16d9eb47878bd6eedd9df2d26a12fb27c20d675f294f8. 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/SEYP40602005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae8a2fcb597c95fa4c4fff4f0c09ac7d024b55998a22bf431f679cd2b404ed7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEYP40602006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d97aa4c0f639df06985e858740979ef4a28ebda19d4a79585e455a2521fdc5b. 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/SEYP40602007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695dbe54f30a6ca497e89462365eb1dc2d12aa33ac90a86df1bed183ccc2233b. 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/SEYP40602008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ad77431b9ab6dc99722e444460873f88a20fc04b3fe24ea8cefdd249ac1070. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/SEYP40602009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97540a8c7d29ba9817993364a85c60614ec54d483aa7095616ce075a907ad1d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SEYP40602010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6037cca7743af99601a5740e2ae81a711ebfb5aebf24307a959fc9951979310. 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/SEYP40602011.