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 0xa50f70f3174cfbab6b9aa65ec8579173a206acb954e59edbd54510094b571038. 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/569a1958-af85-4677-98c2-d5b3f7e32412.json and https://artists.proofprofile.net/proofs/artist/569a1958-af85-4677-98c2-d5b3f7e32412.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x6cff2a947530a02e764bdfa881364bbc2dfd511b9006c46fe1cc1b5aa2dfc847. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBSMU9252469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb597483973d83acd9a73a20f499f4ce1988584dea30c91d2de43a3d0208713db. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU9240537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e195c5e948275e9a22ba153ed5babcf402f8a79fcc29b180c3342ad0a408343. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GBSMU8766745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdd10f6e85a561fd63719d4f535131916b940709f4cff5c74bdac83034464e6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBSMU9018148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427b2ce9f8f9e5aa813bb1847b8cdc87b30e509b664b8ad1a9329095f07789d4. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GX4R52258350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fbb18f5ce7b548d280802ebb04a3d33fe0b624f7fd3c7eb4ee009e583f3325. 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/GX5MX2274017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa856c554037bf8fedb82146dd9ba3cdbdd4a9ea58724a5b5340b1080f0d98a6c. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZPLS2507590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e5a77a500d1c53224428ec3922c294feb3b90065054eb7f5fc1840d4e4d34e. 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/GX38U2278422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708b7ae0e12b69bd2daf85c934fc3a8fa17d78b22a8592a50f01af5709f2adbe. 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/GBSMU8332848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73608dc376d963130caf47ea10fd9a0920502d81133a939c8ebcf12e3dd9cff8. 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/GBSMU8063093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f3560ebfe034c8c3332909e27a4e04b339c78d3a64f6ce86bcdd430f762e24. 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/GBSMU8112307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919d055260749c6f38b1fafacc890b4e5bf1ae1638aa520bf7ef361de1919a83. 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/GBSMU8083289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b783e7798b8d085a639db85c83df6363b361d11e5e3170a2bd25e5b2f030cd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBSMU8103519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa0725f417a4df3a16029aa2b22615c2915f3c96ff662d3a747cabe57a66b0d. 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/GBSMU8083222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b9e65441a3dd656ba04b4337c5f12f9d2e344e6e148d185b917fb3412a34f6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBSMU8103555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2767069c69ed77f01fe1aac6c9d47a4945b48b537b2539b48ee0af774aa81e5. 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/GBSMU8095231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6246a5bb39d0b464b1ad5f08cc1a327125c80a69ced6d9378b65637e6b47a7. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBSMU8091163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b0e060a8f1be64865b3af58bf71ff396663a3e7505de316a44e794b290dca6. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/GBSMU8110414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f395f0b50bdaba550c511ec4233c43046dd170f6f99fffc09b85b469fc1bf7. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBSMU8067534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431dc3dfb8004af7983fa4be560078357d97062a1495d9fbcb6542c1fcb3f7a4. 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/GBSMU8137174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aed6425c7937935d0cd1c2ed625ea2125347d29823eded393cca9a8471e559. 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/GBSMU8063074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7655e0f4ca3aac453ebafb176d77bdddc546f6fafae4d836fddeccd6a98e18d8. 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/GBSMU8160196.