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 0x59c623a1883c58419ac5a8f9b17c8edc07c10143a9e5c8d16802f4af7647e1d6. 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/c5451d9f-7cef-4884-988c-d479d166537e.json and https://artists.proofprofile.net/proofs/artist/c5451d9f-7cef-4884-988c-d479d166537e.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 0x1a2b74443a1e19868bb06b8403c8f02079e40671fd4169c767151c97e1e3a3e4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USA2P1441872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb92ba59ad01900503c5784fc708a454fb4d5d8b2ac1baeafda19bd8fcb3e9ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1441879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ac9d758f826c05dbe66f80f2acab5318f80b1d5c7bed0de7838e180b5358b1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/CA5KR1567972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5839ba81f167e7712204e8708f38aceb545a50e903c3952532c6c5a0c4db47e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CA5KR1567976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4240556ab41c222a1b9e51d7392b66a35d9080cd047eee3dc35ac976c8ab253. 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/CA5KR1825171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d9d2d8ad89c9e016141416d4c34dfec4753987f1b4e3b0fc86e6c6212b3a24. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/CA5KR1935208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134f5a1e4347329f61fcd91a11831f4421615cfef860bf8b55fb7a251b73b91. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/CA5KR1935209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676839268a735094bcd8705f941f11e18041f685f0a9f48cc234d171cc7cc763. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYZ2143144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cacd453a1e764a0bfd8563371492eb6c308be9926cdbabd6f2c7d2acec08aab. 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/QZHN72320568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba43b30e8faab63b46cd7845b2b84d240778fa71f10b5a5af07ed77f6563808. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QM24S2503219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3a2b7d72126cca81745dc5a85bab47f808f524989462c1b06ecfe6e4e52bc7. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QM24S2503218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb1ef087cc9ae2d6ac9cef96cec03cea4299dd45f83dfe258a8e1e2ad1ce408. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM24S2503217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bbc2e70391c7c53a66abc6b45accac9acfb1ca4bf7148d092a62eea973d6f0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM24S2503216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52f1dc7d51dd828604faff18ecfbdebf9066919977b701c3be7ad84614343fb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM24S2503214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2987a355adb484960866a0aa446e2329ba4a3538b5b0c07ef8bdbc95588c73f9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QM24S2503213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65fc328fce270ee325bf501cd5e0bf28d1dbd07e9b983cd1ee0b6ac7b568a6a. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QM24S2503210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc3d1c6244e4b33f02d2ebace045f03f2caf5078ea0dba71b2145224ea4664b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM24S2503209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5752b3826ca6e7fa352869c24cd4fda72f25849b583298021cfc54ec02e20593. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QM24S2503208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca462bbb5691b5d416a1967875fd6a6c98b2725d1e90ee49ef18f4a8e1a88fe. 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/CA5KR1837941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a431c8a60f2c8387b90e57c4420e02c46356713137cf2e5c40b88d223d6247d. 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/USLZJ1519069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be2c5854ae5ca9e802b687f218a5c1f2073a439903730b3a2c907eada8b36c3. 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/CA5KR1805185.