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 0x726d667e52b246f58027013726df1bd148678e5e0a7cdcffa3f39d163f7d53ad. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52c31ece-bfe7-4614-9109-61c7ca6ea380.json and https://artists.proofprofile.net/proofs/artist/52c31ece-bfe7-4614-9109-61c7ca6ea380.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 0x9ab14624ef9574a73aec68bd8f95a6b35dad52c67f718e733d3a0865ae329eec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZGLM2405615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5689f121dc5ea47599b20453e45fd34dc0bd50b4c1824de2e3dab70403b23383. 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/QZGLS2540374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bbb27f26f2c68ddec6ff57e96de0fdaef089ecf64a5c7cfa76900783645eb3. 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/QZGLM2584324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132698e1fccbdc183e036de9c8a02ea8a2dda5cdc548da8f0617c584c632bd51. 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/QZGLM2506524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e38291042bbc2759680336b1ea79e1bc611df6d70a68fae1f1f355205eaea6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2584307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd424301a8a958db55daf81b28b29d75ff71334cbb982f0016d5768c1b0fd7c. 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/US7VG2565461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1a98f59cfaa35ace94156638d13b9b732dc5a5cf1f4f57ff26ec7ea7c3ce71. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/US7VG2537175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a165001bb352327b1e4c0a08e6b27ac85f4e468c08e38ccaf816084b75b20ae. 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/QZW9L2489891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ad49a5b4a934e5945d8acca593a69314d7101cdc0e12b18cd06d5299c624ec. 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/QZW9K2495012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f602fa03fa00e51b2b2cf974c7cdc1e02f36dd2d57b8e0e3f14fa8b16710a85. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZW9K2433926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f62c6462d16f00bb7f7d1aada159789136500af2289468b5d48cfc33a54697. 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/QZTVM2495569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f03977489beed28de58b6e1f9ca9ef89ff3e2ef84bbf27187da16a07df753fc. 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/QZTPX2412553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979c1e1e5485d553646aa1211e4828b32680e849b20dacbfbfb7c3e862f420c5. 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/QZNJZ2477175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93451174eadcc56927ce1d2f014592e68cdb0a9911ec5d6dce6d2ca2fe89994e. 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/QZWDD2427616.