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 0x2990e2505be805487b5b043eb5d21c9383bbb4a46a0d9123acaa207f4678b9dc. 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/88084a87-0511-4cac-a3cb-6215de000d75.json and https://artists.proofprofile.net/proofs/artist/88084a87-0511-4cac-a3cb-6215de000d75.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 0x0e537e73ac9fa12d77a7352ffeddb17c2f2eeea01ee6f6b86b6f308d3175a71f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZMEN2490343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28fb219d5530c367926e3b762edc545634bf15f36cc107e3db8a81b7eead073. 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/QZHN72464576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c9b05d18d629161a7fb7408b0a99039f21afca7d95b8eb3c3e0537224da5c6. 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/BXIV82356824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca48fa9cceaa1b983ce19850336897282828b89ff9346ca75037ed21fc8ccdae. 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/QZW9L2225370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a6e5aee58f6afb1026845d7f7912795505def4b894be422ec9e2b9b18402bf. 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/US3DF2225222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49241f57a100fbb9894d1dc5d402b8854247f1fb1bff56b778f8b777907778e7. 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/QM3DF2183082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ad53aeea354b26821e3736880cef53875bdfa1b0209e8c15166a1e1892edc5. 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/BXTRN2300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17a3b591e3d69e41cafc06f624e1450f341239df6a9f074fab69eca0d5020ac. 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/BXTRN2300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecabd991ce4458dd6296a2d3816e99fd986a37cd2d03c620d807a62cbf6b326. 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/BC6M22505136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ba2a1d33d660bf24e75b60f0b9a2aaa3aca325ed97035069b4fb793273025f. 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/QZWFQ2443326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddba93045ecb2eb335bfb07531d9f42154d397cd993774440671a7a55758c07. 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/BXIV82473913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793c79235d12d4991c9b9d577424fe4ba66134d9fee97445e175ad3996f9e7e2. 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/BCX6W2400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc82c72f40edcd4cf428dc4f3080762bdb03d63e8509c60d6700bf19842ca7b8. 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/BCX6W2400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e2dce71cdccbfc892fb1d0d2294747528407c270894e3c0a30cec36281a60. 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/QZK6L2445640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519174aba1031bae17585c06ef1a8e9de40c1d907e63b022f8c7e725a4659a7d. 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/BXIV82270653.