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 0xbf7fdef89da66282769585c75598aba071113a8eab1114fd03a099ebceaf4361. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65684305-94d4-4656-862b-62f8e8bc5cdd.json and https://artists.proofprofile.net/proofs/artist/65684305-94d4-4656-862b-62f8e8bc5cdd.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 0xe2031ffc946d00647b7dbbe37f8cd6ef8aa06047605a22730ec084171d6e2ad7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCADU1868247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b438f8f4d6d4c0c54d9ec693e155669a8df16ba8d95488d7c657b3bcb7383b3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAEG1936591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef6297cfc06e8a7e9fdabc2fc235a3b780796002adf0b4213876f4a7a7ca53a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAGX2368379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07efa8739b61489ce7afdd13f671a8b8633b856072ccb58917fc4bf21c0380df. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:17:50Z), 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/FR9W12332445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d62a687e581434280fdf48a2305f382589ad8f7b62f46b5559cbf1b323879d8. 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/FR9W12332446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4099bd667ce0c3c8eb5750ead618dc203a5a04f1f57116d66e155cfd8e636d2. 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/FR9W12332447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbae2902bd2f4479b9531c06cd7682569f968edcae71a35c46e4cec14a45d776. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR9W12332448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc438e215db7d98b1cc006ba3e4ce33ba7ed40d755703220a183d476b992cfa. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR9W12332450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50994f760157ffb0b03b9071b98bd284bb1d4038563b03c9504fcc782ed8fc5f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZMEP2189848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2564fb7e9a4e67a01f38843ab675a008f173747a4facdd9e0cee6dc8088bc4. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:02:56Z), 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/QZMER2108094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d2ae770360132554f3f01b5190becd21198c8137be379cca4bc8979aa9b08b. 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/FR9W12371724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03a0696be57a090b3ff6764f95e746b48515e494ff76c42fabebd08e94e2aae. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJN2553668.