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 0xcaab806d7342d4c306188587f3859867370402c88e02dc4966dce830cc25c191. 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/a3f03944-4513-45a2-bde9-f70847094fa1.json and https://artists.proofprofile.net/proofs/artist/a3f03944-4513-45a2-bde9-f70847094fa1.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 0xc28e42030d50f8a6224e215510dc74232cd6c4c4a8f06808f34a8464cb29fb29. 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/QZTPX2362345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ba2c3bda61e6a5efa0734ab63264a9ef832510e5ec23d4a43f7c1b9257b9b5. 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/QZ5AB2447636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055e1dc9ee90a4e58ff8b3a822939c27b5024f5668603ed2d5dd02ae8d594dd6. 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/QZ5AB2447641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28e42030d50f8a6224e215510dc74232cd6c4c4a8f06808f34a8464cb29fb29. 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/QZTPX2362345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb439ecce7cf0d189940018ed95bc44679e28b7d8b399969c4166141e9d2de6a. 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/QZ5AB2447635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cace06703f058ea4e2da353b47fa086071f31412ccc0b1490159a4817e0bd37. 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/QZGLM2346876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183fdddb408d7406504d278f34b37297ad84a9ed58a7fd134d072652f106cb1e. 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/QZ5AB2447638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff6c116f9c92302367a8e456e11e8f26d1dda298cb3248b756a3722b683451f. 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/QZ5AB2447639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb67524d003d991f144e2873a6cb576649897e44710871d4ce3d12635095039a. 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/QZMZ92312275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ee23df5e0c9e985a6ad473311b1fa11ff4a6a50798759edd4bda535c288132. 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/QZGLM2333206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072b7533ec669822a6e0a6b0b945fac0ef8f5bc8c4b64980543ae4dc2ad8efb3. 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/ARIXB2311671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cace06703f058ea4e2da353b47fa086071f31412ccc0b1490159a4817e0bd37. 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/QZGLM2346876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2664298262901ce00f680808d40c64b5e62c5725514aab77d4e91411cb1cf69b. 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/USLD91743892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd1838874c9062363874ab306538fae02c479c1859a368e8f8e498c598ff0cd. 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/USLD91743893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155060de2eedec245a3845e22d4072de6f8f7607837ba913599468137d7e29af. 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/USLD91743894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330718dc88b468cd47558fd7e31c9c475e221873e2f902e96ff8ce95abcf69f0. 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/USLD91743141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa970876a1682a71862106bd10f414fb3749e562b1119e0963fe0e5ee22bb3f22. 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/USLD91743891.