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 0x3b3fdcdf77b06dd6ff557e8c75f973fd3ea4bae0995335d37feeb6042c67ee73. 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/30cc683a-c6a8-45db-be19-6594bfda4a00.json and https://artists.proofprofile.net/proofs/artist/30cc683a-c6a8-45db-be19-6594bfda4a00.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 0xd77a78d463dc5e080cec20fb84fb20e2597f3b6f95b7838d0b63c988174a0c02. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCADO1851675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57aad971f9bcec4a4f44b61934a16fd6e88907b1dea69e3885263c310c6e7cd8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:36:04Z), 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/TCADO1851702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7a5fcfe8ac54c05757700afbbfbd2751400f621a50a8c1931b898224270185. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARB1K1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c66eb4f92974e637851a6bdad647d02edad9695423112001c5d87785ca5545. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARB1K1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebafb03875f7e3bd095b67a7c799ef7e437dace027ffc57590789f026b679c6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARB1K1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135489a9f9e3e86ef3d2ebc19e0f57cd330b780665e7a8e83bfeca181bb14fc3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARB1K1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9952d860f8df144d8c0da44830accc82e3d98cb9fcfd3917828694a45de443b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ARB1K1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7263129c7a9f618c48991a7fd1f596486b0703e2e58a965fe5c5678d32bafe9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USCGJ2183335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea502d35383775573ec046b029909581576c342ed7e39d5d74e9333aec262921. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USCGJ2281076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024fb89c94a5d9a9ef53737e368dfb9ab44836b83e3e76652235becfbdbf09ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGJ2281077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bf8aa4e9335005af8d6acddaedff1ed89821ed27e407196e0552c33959e535. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGJ2281079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db77d399b121424cb4a57a73576674c22e77b6a45775074bc1de42962feddfc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:55:52Z), 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/TCAET2069652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe31f1ed052056b99c3879ea9daaca6052aab78ea918f6ad98bf279c840c271. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAET2069767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd40bfa3921f25cbc53be0bd1d01d92587c4ae4f782dd3ec465ab5aaed63705. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGJ2183336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4a53160498f0c4de4a93b572d3f89632388a5287dbf275f21fd20271c227e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/USCGJ2183337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dd81e207cd6a99cc1dd410ee75f28f223262a46cd8bf9866a5e8e0d8227404. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USL4R2384446.
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