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 0x7461c13f588e27a706673bb0c4fba9c7eda2aafd9fbb2c55fb43df0eaa12bcc3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/219f9b5e-af01-4963-8af6-c910fabb1e0f.json and https://artists.proofprofile.net/proofs/artist/219f9b5e-af01-4963-8af6-c910fabb1e0f.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 0x53759eb66a3828921590701b39340ef8da1df199641dc7bd995c3ab8086ca7ce. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTBC2498971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bebc6e192cbf783c7af3354af351089b8de97a86e972c065bdade2cf0aee58e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:49:18Z), 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/QZWFP2401159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77311aba43acce843e58a65fcb8e565f5fc85007e0ad89116a20076828d7a304. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZZ7T2417228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f3ec63a823137be8c8cadc705a119461351b0c8401210842e9f37b2e4775bc. 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/QT3EX2490873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6c2df50c7a6aa8929684abf8b9beba9b0059b8a1db37340b321ba27d6a9c92. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QT3F32443387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9e92d96610a00a4615d922f59bef40da874b0487b4a007dc1804a5ca904d45. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFYX2534142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab11d22935e32411173e882b7ecca8a592668fada80864b197674e7c52a369ea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYZ2529983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc422395de77debafe6848aa6fe93b69f52e053d91caddf89c0f68e0fa7da056c. 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/QZFYZ2529994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77311aba43acce843e58a65fcb8e565f5fc85007e0ad89116a20076828d7a304. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ7T2417228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb657789fc316657ece0e846e467600683a0ad243cb9573887395364f823e6ae4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7W2449023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f3ec63a823137be8c8cadc705a119461351b0c8401210842e9f37b2e4775bc. 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/QT3EX2490873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab11d22935e32411173e882b7ecca8a592668fada80864b197674e7c52a369ea. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZFYZ2529983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc422395de77debafe6848aa6fe93b69f52e053d91caddf89c0f68e0fa7da056c. 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/QZFYZ2529994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b334a313b2035cc6e1c45928f3c1eb0dd0fe28bd98dd754899d45ea010ee2b4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA42501071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ee24f9042aa19c98b1d06ac455d580fffea89b6dc75c9af9c2c32534668ad8. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:48:04Z), 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/QZFZ72599372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f61a31e0fd860c77ffd882cbd2fb2fdf502d81c3e87e75bc4d9caddf59bb1fe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:37Z), 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/QZFZ72593194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ac55ceb541769f57b0abb3c6fab1c3fc94aa044fc44ebc88aac1069d4bfae7. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAU2599832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533fb629e9baa7846ce129f2e14ed27f2baa3af552530354153993e7cc5e981f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTAZ2595245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8496fb43036a4cc79e06ae102bf34b0817fa755e4aafdcb83455cb17b4df725. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZTB22596299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fef01bce730758c02d05a7330280503080dba6e7f3f1c1cdae12240d430ea96. 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/QZTB92560298.