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 0xac8c2799d149514c247793c20081e0c55f13844f4ccfbfd8e661daa588e2056a. 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/2fbaff13-8ad5-4ac3-9649-1ea1d0a00d94.json and https://artists.proofprofile.net/proofs/artist/2fbaff13-8ad5-4ac3-9649-1ea1d0a00d94.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 0x29812c6f23391b9dbd881eeabf292c83dfaabe579a7f6eaab239ea728ce2e6b6. 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/QZHN82423906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72918148f4ead59cf1154ce528fb3cfbaf6b89f976ff60f54e9f0c8fea218ed. 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/QZHN82423907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e894a1282e5dca2f73a222a94b4cc7c8b43c7a31fb97aeecb7e07568751c55c. 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/QZHN82423908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9cec36ffb4eb42cebf1d4702c668f417a32772297b99bc5db4c55a2a60d53d. 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/QZHN82423909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7723e5bf2840ae7159d5b85f4b9729ebb4b32340f33e8e6b8414c366fca4c39a. 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/QZHN82423910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdef467642ae373716844cbed04234d910fac04c34447ee8e27626e3e13e523. 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/QZHN82423911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1e4777c04551bf6fd6225f8b5ad9e28e6b4788567cca000233b94584155402. 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/QZHN82423912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6bc312d67608f2dd2722223a177dda70b8e630e0103e215c2eb12982a8729a. 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/QZHN82423913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c39780a3d5fe846b43827ae0fbeb8771bfdd724bb5ff4329357a1fba9350b41. 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/QZHN82423914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2bd05882835c7160267ef65a9d421a2ba914e42e48dbfa70ea055826800451. 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/QZHN82423915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef81678bb1cde550d078e9745a9c4704cdd0f10b281e9553ce21dc950a5abcb. 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/QZHN82423916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a57ed637eb3b9e8f0cb0e3898cac68e7e3e3cefeea76a529905899f6e39ec8d. 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/QZHN82423917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ea605e088bf33ea5ad974a9fad66ed132dde3c6cedb8f2cade1c5369826427. 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/QZHN82423918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ea62ebe294f410c44063072933d9d6e06e8959f23d4aafdd6bafb841f27f19. 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/QZHN82423919.