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 0xccea4660965cfd92f9fc039b0dc16f5da6e905161fb9d3bdf480bbacc8692d1c. 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/48ff5d91-a551-400a-aae3-77983465f5f1.json and https://artists.proofprofile.net/proofs/artist/48ff5d91-a551-400a-aae3-77983465f5f1.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 0x752cba128faee3357b7df7b1211bdb7b3b3541e44f01cccdfa58c85397a880b1. 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/FR33T1850801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d8e82ffdcd87adb49e07f1782232086e1f7aee842421c41d96e0bf1d143d7b. 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/FR33T1850802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2658bd1da4bcf788c6cfcd140f1c5721229e2711451d51cb6f1073e7b986b69f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR33T1850803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37993e3ccda80ce6c385858959afbbe099221bb9e4ffb615a8422f9399c35903. 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/FR33T1850805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fff84b54e0a78faf9446e35f2a2b454e9e4108f66319d7d1dff0fba0a79c6f3. 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/FR33T1850807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412154008a69be04f231fe7c42f321365260887df3ccad175ac64a7e7e36c218. 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/FR33T1850812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26aa5f482587bff08f95a950afcc623c9818affe1d019dd583b0629dad925f47. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FR33T1850815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2652e0436b231d84a6749f54155c3ad70f7626eb8651302bdf1a95cd6b23eab. 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/DEVF41600071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125fd9fdf64cb9688851093530cf4454f7b97339d0ad6184a07f878b30a35686. 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/DEVF41600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1485354a09440d2adde2aabacb6697a6a899056e0d80df7c2d1658ef8cb816c9. 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/DEVF41600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520ebee4dbf33d959a3cc8402196f740cc61dc16b8bc35ce95c74d4f75ef833b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:11:07Z), 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/DEVF41600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b62fccd5d5b3339b761c10452d93b25b0123dd7cbfd7dc1131fe4430ec6614. 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/DEVF41600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf0997d1d7eed49387aa8c2acc81f04f0d4631fc84a31648e9779c49f4bede2. 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/DEVF41600084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90e53d6717feea94c8d3b329cbdb03e020d8231d3dcf66510c4f901d93cf9a4. 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/FR33T1845601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c88a37225fc5f7b9e4ab699dcc2b8005177ca2eb045a085db9a0370afe75c1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR33T1845604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6cf55aab594cfbee237477ca657c72d70502e3ff874baf00192ccd4e019d6d. 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/FR33T1845609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c488a76c47f106a79cb3f7ac54f85fe9eae6f95cdf246808a751a9c80a97ddc. 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/FR33T1845615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04f312db65e6089b5515aebe9da75e34336d9775b99d1a7ee1938f0a5d9c79e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:05:34Z), 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/FR33T2380201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c56ec6525199f64ec739ab942350432cd1bf4ea32282767abb923a042ddcfea. 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/FR33T2380202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b2c9a83babedf7b179a3e251613a30935bcc0d704b4021edf55e1a23fad919. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR33T2380204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843fcd463c9bfc7b653f95e2e43fb7a349cfd3f3f22f1cfdb86c0e5b939bc193. 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/FR33T2090036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3691ce93f501b6de526ae7067e00ef346894f4a66979068a93f6197dbbe71e2. 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/FR3JQ2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed1e6623156d3541865fbf32ba9ec20bdf2ceb65bc508ab15e2e228be7075de. 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/FR3JQ2300057.