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 0x25620bca3788266768aee8cf893717c520da50cbfbe389a5dbcfe29f170eafdb. 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/20d3db75-cebe-434d-b3a7-c473483a8eda.json and https://artists.proofprofile.net/proofs/artist/20d3db75-cebe-434d-b3a7-c473483a8eda.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 0xb885e109fe875bfe4153cc9c120d078d3827048fe0e062da056d1c29d1b26260. 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/ZA41S2301715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6460e206287ec5515c863b851eb0169d5c8a4241238481adbaaedff228bf45. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA072426947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2060d93fc98dd3c15fe7dc4477c4bd8ec0169eb14b62fd794bd0861cb65bccc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA072266400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216ae4bdcd118db19691e6b1726f871c91454144b499de0eb27e94f0a82f6208. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR7JB2300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216ae4bdcd118db19691e6b1726f871c91454144b499de0eb27e94f0a82f6208. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR7JB2300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f63495fcaaa752d084211a8c0d03db14655f8d2286ff6142fd798d55643fbe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6J2025469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59f32f8e2ed201f62f75cc02f3fa3b4479af95535f8ced3fd0a0fc0bfb1bc09. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12407171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb1f9535dd5184c9fa7732f9147494ad685ca6dd00e5f2e60b7e830fde3de77. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12423725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8450e30340a47a7dace7a4006f88f53b438f3a3d28ad40f5214d66fb644de3c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12427234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb1f9535dd5184c9fa7732f9147494ad685ca6dd00e5f2e60b7e830fde3de77. 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/FR9W12423725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84d14a33cd0a2da509991fe874955de8ac8ef7e697e575cb704384737cdbaca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12423724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12856e24bcb146bb1583fc9a1e6bdd861869e9d31545462b80cd18229eaad8d9. 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/FR9W12432236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b010056b5b1b07c8d689fc509a43105775522a7dd086a865c1dcbaad8c85da6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12444145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90772246d95c60fa2453256c88c9ac7df149833d7363171589d8deabf70c17c4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W12423728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434f1167d211cbb59b7105de046c64e6b760fa30edfe6638567a004e73971caa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W12423726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d6ef6a19268de5f78396c5dba0e7184887c184ee37eb25a999cc9f5c31c20b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12423729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dde061deaccfd5460f37538b13fe07dfe392d029a44fe8e4c1f88f5c4e8fca0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9W12423731.