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 0x7a2763962f04fc6c56b23ce8f0e8b4eefae927ac36797e4771a8c5570f8831bb. 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/4f8fef13-ccc2-471c-bd29-72e227bce40b.json and https://artists.proofprofile.net/proofs/artist/4f8fef13-ccc2-471c-bd29-72e227bce40b.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 0x57a51adff6b0c435bb9f919b65e26537c63eb8bfbce6024d1f444d07cfb29d17. 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/ATN262088901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0531dd9f701bd0d2692ec5512c559ef626a2b9f7f92bd99e61b4c4e33beec3f. 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/ATN262088902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd234368d65574e21b62e95e07a3f562ea0fc90d7c1de1ffbd1260566b8770487. 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/ATN262088903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90e24c8a09c5b60ec5e326cb9081259c528828618f6476e78e3b80bf47a59ba. 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/ATN262088904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a1f8334685b604d1ce287bcf17883586deef54bdc9cdf1e311d08e48ab7316. 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/ATN262088905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237432fa5e41595fed643f1e66de866dc709e9add80711023c519d2b38b247e6. 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/ATN262088906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831a861f388d6b4cbb3379287b2178c67028f57d9a295b8b1cc7c5db6d9762bf. 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/ATN262088907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1769e002f2bb3178106cf98e099b1d588060dbfe22f53bb59f450a91a1fe35a9. 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/ATN262088908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb6834a563e59574299ac176e752908573ab2b1c86fc7f66d49de65af22503. 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/USDHM1802516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f73b70e37280d6d3ade8467d2213d801438bd11d6b6e73c3a54c2d261bb69c2. 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/USDHM1802517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b62073fa531e82128e6bbe589f377137bdda184b684c0d8f01d48fe5016a6a. 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/USDHM1802518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f30f3dca70344183e6631d7ca8d3e1ce3477dd440683a5f398ea821167688f. 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/USDHM1802519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb542e85e8de393421bd6f8ae84e5425e2e0a89bcf843c6a4aa24813b1ee4f082. 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/USDHM1802521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6acfb034a524a68f972d46a64e8d95509b12eed57f9c9135610342ab62e6d9. 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/USDHM1802522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7218d3da42342ceecec6ad88d588ac581edb75f3818bcd66483dd00761f78c1. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USDHM1802520.
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 0xa4e4973b0765906fe3ac5b5582500d45c8106d5c6858d03326c186279b9feeaa. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEPI82305054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82780207c3c4fdf247faac592c1e06729a3dd60cec57a48ae03cd6e5d40c35fc. 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/DEPI82305055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674d4c3b66f649b333a3975517340f9bd7a83ea8a83fa7a2e22d27d870e4c140. 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/DEPI82305058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc679e558747c5dd6a97ef863b177557b3114ef5bba4df61ff530e6ce125ca3. 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/DEPI82305060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0aba849d421c8633f8770dfd79c7cfee1d786481e6035d23c5283eba0d8096. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEPI82305056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df759a12ccd12ffed3bacbbc99ad95a25e4f6c0c0ea38cd8b416098d8ffd9af. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEPI82305057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34eee4619b6e4960d26408c6d9e31e1d09da87b5609f1924b83ffde75aabe10. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEPI82305059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dcded18608e5119dd9479a4a7383fdcfa9cb754efe1b20e649064809f02442. 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/ATN262103501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc3e43498bf858a3438032afadcf142906c81fb2be8d26ef78528c5f4178a0e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATN262103502.