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 0xc01994b0d89ffb86b50eca9f0cf1976b8b18c3ae0801f21732e8c6ceddca973d. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6aa4e2c-62ac-4585-9b5a-702b0cf1f5d1.json and https://artists.proofprofile.net/proofs/artist/b6aa4e2c-62ac-4585-9b5a-702b0cf1f5d1.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 0x1a6784b57280c4cbfd7b7ca2a5b2f1700934b2cf3fb126f99a09c197575bc130. 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/QZK6P2261772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79d22f356a0a1826b75a797e7c0a1ff2ec557f7557a630d3d096f34ff07d928. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAT2409244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e0364fa9820ae72069cd0252d36625382cbb6d900fbd5e0132dc9c60a1840a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLR2471787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f3940aaf93634f37241cf0a20896a6d0a7679eb281fae18b7bc11607c496c3. 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/QZDA42303747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e3439b992620e1e0a6d5046e00ea2923e882372013387df2ffe7d7cec75d8c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR2X42216832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1296ab3f87aa5ef83141668a1aaba9b62741c2dcdd11e4259a9e873e6849e07a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH7812359557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00b421e46069814cbf8024ca5a19041ce7bef2afd538f9ba6253beb8b66d3cf. 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/CH7812404040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa771072e51f4d8c7b01b8de6384420ac998591397004f3f46e01acd67649ec. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/CH7812238084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782f3c1e516e833f0f4dc11af54c71223d5c73c9531ffa7ff2e7c601e7edb646. 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/CH7812400977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bff9f314f58e115ed948c50604f2bfe7f4bcb793c77a44011451b612e15216. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CH7812404043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4ec8d2f8494fce6fc17a180a38f5905c6a09015ad645f4197a3907a7e1baff. 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/CH7812368407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8e13d5302be33ad6e916f07cf76d02a21bbbb7f7a2a472cb75d02ca06ceef8. 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/CH7812404044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10312de6d3731a7c47b1d094841920656329e0d8348cadd22ce47460cd67cf25. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CH7812404045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cf9e3382a749a833718a3b8fc8f50c30b6390f4bcba00b2f41feaca672f53b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAW2203903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b259758db234e250989e1487a841008eecb49656ec214f8257a4b1626232dbc. 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/QZTAW2203904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc760b437c35d2aadfad9904bd00c4e2f348d6a10780bd0cdeb8482b16b1aec14. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAW2203906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57fc207f8cc69b80547f911574884f1004faed25b627615553319bcb4b1aa2b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWX2212525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f2120e0462c129b4c5bd6c2f5c94c261f4ac75a66fc38bcaf3007f179d275c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZMEM2202670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5977736660b7883ab70cb8cd61332e8103932ebe99704bc0149db2d5f9c7b42b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812400643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f3940aaf93634f37241cf0a20896a6d0a7679eb281fae18b7bc11607c496c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA42303747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c919d99fa2c88046fa641d3143d19db2b2f6434ee8c8550eb8880bf96b3a4d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH7812221216.