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 0xd7fb3aa8f59ff279a21ec3a4aad25b67ef37d75be5ef4986d561734dff5b527b. 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/ef940abf-6287-4dca-afa6-ca26619817fe.json and https://artists.proofprofile.net/proofs/artist/ef940abf-6287-4dca-afa6-ca26619817fe.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 0x42d2d8420c494fc2fae452776a0389eb1c2a0d4b878885d86d74bf4323f2127d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZFZ32076260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99a7c98122836aa490248212a5dc1d4e932fc0b646dc840322f7c57e49078cb. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ42044685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bae12672b79efeabd07fd06fc8b907efd20b5009bcce19c95827be05a116144. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ42045578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedeee1bbf04f5148ae31771544b6c4bf32319df17c083cabd7555e5fa5a0671. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ52037470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d8b6bb832a6a9a5c3febd4e46973bc9e8107e3ee27cdfaebc8c7d6ee762922. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ52035167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fd5e433359568df0ef1e1ffb75586d08d672a46f431c16a0700277f0cdb7b6. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZDA62029012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122a702135ca6f87e2e5bcdd30016f63dc071a7a26b6f29c7b898fdc0e87615. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA62029011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8c0baae9a5fa4c28339ad9a4f51d50f49c595a2ef24c770175c34b4aa7d310. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA62029794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18136c789b023fedf27a0a504e93499fe2e1a92d601a2307d0cd38906af54feb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN72097268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d040f7f80199bb04edd0b6fabc89a676d6029c13e753172203faf493f577fe. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZHN72097072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfb22d67c2c74db6233ffff4fc686d5e4ebdc6ca7032c8deaeba3be9462b659. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHN82005187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f27750dcb047bab2943a67a8093597253d5f9ac11cc4069e08948de91b5e9b. 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/QZFYZ2171776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de44fb8763a1d1d6318563600dbb69c8bac7569a474848b25bf6013308ba9aa. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:42Z), 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/QZDA62176514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb653052b6fbdfe0be4944cbee056022c72d17bd68ecdb765c9d0fc0df093a3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN42241344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecc9a42573a956edb0673b062f579ce79896c4dcfe82b27f592fa138e8704a2. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:29:10Z), 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/QZDA72308766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf874a395ffbe54649843f362b7a5c458a76236184049ae1c2d3880001385188f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN72543598.