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 0xe68c0dda679492a88ad5c51671411e3a42fc96f1e6d4caed03033ede155abd14. 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/f294684d-72c7-41ee-8137-b419bcaf5a5c.json and https://artists.proofprofile.net/proofs/artist/f294684d-72c7-41ee-8137-b419bcaf5a5c.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 0x56bd8b7f9630dfceb086678e5da70abed4e84230855d949504c4cab7a2e54ead. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZZEB2338282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a2248893ca57a6eed6bbdcb6bd72b6fa462844eb0e1df8531b7150f5d6364. 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/QZZ8A2372098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bc2407b1e38d638eaced9065022ee9ee1a02882f331113dd5e8db8763b5956. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZ5FN2462000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3805a3208bbbc6bdf7db593dae9adada9817ac8c5450d4c57d1e4281fe07bd. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:12:51Z), 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/QZPEW2468353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251af44cf8c2114c5a34d61216069c8abbf45fb8345e6fe402650099fcd3b34e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TLVEM2469075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2dfbe79d21ec3400f1ecffad7cdab2eb87839c70fbcdfe7373ecb297fc1f45. 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/QT2VB2434149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b12c6d2a0819a6b63810fd6fc59d479598a4b27f301c6376ff3260b6415b8c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT2VB2434151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78953b0a1c53a78d45b2945baeabd1f913f14f8229bd0cc1d92b8e71215a76e. 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/TLVEM2454348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13faca98c23d4812a9af4e4ac819836856f957f5ba400fd603ad1e5b4dcc236a. 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/QZWV32566907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3538980f16a79a00025fab72328b0c9845e39672ee331f1aab81af98bc053378. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZZ8A2583962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3033f33d348d35b2d210d662778539717e39ac4bfd8e74fbce74d9c04537836. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:24:45Z), 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/QZZ8A2522753.