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 0xbd76341d493fbf047daa1b4c525115cdc2dca8a17d04b5f2cbdb6fb7a6188e66. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e8885d5-cb0b-40d6-b61d-c2d7cad9a546.json and https://artists.proofprofile.net/proofs/artist/2e8885d5-cb0b-40d6-b61d-c2d7cad9a546.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 0xdb65376afc439551017fb588f0275ec25f0e5aad827ee3132a6d3651f3ad3d66. 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/AUGBT2322118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a6d93863853a1e460db513eda2a2a2751b1e1f720b8d716f6ddec6b6338f85. 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/AUMEV2402997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3134dd6fffafc463075f6331341657ebfc143974cb57ef54b7a1c91dae45ba3b. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/AUMEV2495215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6d93016289a30803036053469ec047de5e67fc8522589c4c2755d9a535fed6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2435386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f63df4a0852594bb686e52005d9a06560ba972957a69420df5ea712f0b5ba. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUGBT2435399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cda26a02d89d9f059124356ff56682c2aaa88557a4c5455b08434cff350767d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/AUGBT2435401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cda26a02d89d9f059124356ff56682c2aaa88557a4c5455b08434cff350767d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/AUGBT2435401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f63df4a0852594bb686e52005d9a06560ba972957a69420df5ea712f0b5ba. 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/AUGBT2435399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6d93016289a30803036053469ec047de5e67fc8522589c4c2755d9a535fed6. 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/AUGBT2435386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5026f944f98d672a86411ed382a8abfc4e4bb9983c11d3bf11fccbfea2e514a. 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/AUGBT2462152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27147418a64629c9221ddabb0e12f92ff0e97a7649b03fff3bba4b9501b962ca. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/AUGBT2462156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43480f8cb907d3e25ac2f885ec8cb176b70c594b81c20b591535085c0d68bac4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/AUGBT2462157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc757648dab4f70dc257dc3775c97c742545e053a5e0c22a5ad4b4dbc2f9e8e01. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/AUGBT2462158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb98b5432f9e6ad772b0bc0bcfa13af8fbc88e4d914a7a7c818a2b659f520898. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUGBT2462159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a39a67b3592bdfb7e7cea5ab3be42bc9a3aef283c94a96f7b3a7be96b57d4d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUGBT2462161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa623cd66d566b5337d7ace88acc8812ddf21c17ab19ab7e2cc4ec94697bc1136. 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/AUGBT2462165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9e4c404e8de972676b5e4d73c00fdb74dbf6c68363889c5e5b25392ef88d71. 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/AUGBT2462166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ea027642feb0d37ed82333860b02850b6d3078ba8646b8afd473b7a2a5537a. 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/AUGBT2462168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e9f934e6b9504d80be23e6433606e9ea748345de97a00bf98836118bfb740. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/AUGBT2462169.