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 0x04782e23c7b47f7c96aae8c38809e1624b913d2a101985e03427c4503e8309c4. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2816e82-5450-4f8c-a0bc-0bf1a2ce1ba1.json and https://artists.proofprofile.net/proofs/artist/c2816e82-5450-4f8c-a0bc-0bf1a2ce1ba1.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 0xb12fd7cd26f634ddb3f02aa30f8dea5aac43baba3b3f5a851cb2e521b5ed0a66. 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/QZGLM1926654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb48e05346ce4d9391f0ee133abc7a5fbf34050f8b7cfc8421a7091aed32e26. 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/QZGLM1926657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28db6521d12a46f580005cf4ba8026f7d5105379e06938a0cbc71f9cbe77921c. 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/QZGLM1926659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e3efdaae613a3ff8a07cbc83e022e728fdc480aa4858734439caf3e40af39a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZGLM1926653.
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 0xabc1f3d41467b83c2fb32707333ef508bb12ac23be6e4ed95094e73e503a7ba7. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZGLM1926655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4dde724fb9eced040e88abc779ae5605be6b25215d31f586a25213781796be. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZGLM1926656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5fe8b6c4566adbb42a5cb3de3964e93fa1f56a8be4e7828ce49a49fdbc7ff5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZGLM1926658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bafafe9837d66a7ea10bf01dd3ed670e5cf5407be81a580e37bd716337c75e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZGLM1926660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919a67c773a8f9e45de9bcaeda6c87f3a08cff4024a0cc72d54d5599834d96e5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZGLM1926661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16100559663a12067a0e7eb65f3458c8f38f95c1d6a9cd2ee73f965a969541fa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZGLM1926662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e554920095fbc9555c214e300b690060affcc48bfd98688f585c017abcdbc7. 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/US7VG1833330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df6d056b9934819b101511acd248059e73d071f7c11ac77d69170428c51c876. 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/US7VG1833332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502e02ba9a039b9c5fa1c98a1b74c32e4881a36f7e7f36cb107cd005fe72bac5. 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/US7VG1833334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05da4dfa364e7eabc6d20e602271be70a47e6b20689ee2ad1221d270ab716643. 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/US7VG1833338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7470a880963668e64dee18570c4ad660d4db7bee765a3fdd5564cacc441fb8. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/US7VG1833331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35d2650f8048d4509a87fbcff1a41830b934817998826a3286f684ce19ae4f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US7VG1833333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1a9d97a0443c1584012d8f3bddaa709f659264a600891c80836253e3837c66. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US7VG1833335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1780ef350bf5315df4f0a60bf464a1cf28ce803964ff281d67b8db3b469c53. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/US7VG1833336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9764363a5f1f7be10e6533bad52110733847f4844649d3dc09ab526fcf37e044. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US7VG1833337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4462431ce3f768533472d2e7cc86176b24638e62c740a12b5edff4a1af43e0. 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/QZGLM1931337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1125892d9512701c5bcf7ac066c767a3ff6a49caf8e3f683d43c2024c988fa54. 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/QZGLM1931338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc0d7738c0704b740106376965305f4c0167659833fdaff40f6cf02868651c5. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZGLM1931339.