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 0x9667fba2d7236e011b20f9ade8916dd96dacfd663c29e290df009c633fbb06bf. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7550a00-ddc0-4b8d-a91f-72ca9f1239d8.json and https://artists.proofprofile.net/proofs/artist/d7550a00-ddc0-4b8d-a91f-72ca9f1239d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x9cdbdd375cb48248f950ba6d14bdeaf061a9297404fd4116253bc1ac962c7552. 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/USZ4V2400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0719f348e564a454da8dde98671acb435ddc3ac4964f4476985ca73932767d. 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/USZ4V2400423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaffbfe158bee074862ed7e67cb25fffd6f30ae74f7be750e991279bd44a40d. 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/USZ4V2400424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66e9829167aa2d5d6e2de0674db385acc3ea67ac4c2d036c57adc6bdc7a21ba. 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/USZ4V2400425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17ea16ad8fb88c9ffbe2f686dd5e1fe927d2d8a90e7e5ce0a00d55d18138ce7. 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/USZ4V2400426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5e8be1a1f629c0f85afa37eba9991a2caa3562cdb055cbcf85ad1f1aa86e5c. 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/USZ4V2400427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60005e1014b171352138bcd69a3bb997321ceca6a8122b69831060364c26ff36. 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/USZ4V2400428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8be466a9849532b127ccf0d94bc9c974de873caacaa18f80dc566b06dd183f1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:46:55Z), 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/USZ4V2400429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217a54d9a1588484f71f362b8a0b2f7dd8660a646d3933d16ee5a4cb414a371c. 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/QZMEP2213950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeeb17bdf43c611b2aacb30fc71a73e6b9fb74c6911abd983988c150a3a6754. 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/QZMEP2213953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5e89df57a44e8091942711689d2969d82128c638fa7048b42707c9cd720371. 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/QZMEP2213956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87159e7020f608831daa215a8f9401fe851b69c9fc27415aa428574854c14a4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEP2213962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2dc31197a2b7417504c04617fd9459fdd61f50bb39954e3c01972b9ab81c57. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZMEP2213967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ddc5a12c736a671ac5438ef2884d1533cf255fd324627e051b22b8c0c8d43a. 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/QZTBA2330823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7d06c935c3416fa0d1ad76433ca79d62fc2653c65b6bce8302171c5a5f0d74. 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/QZK6J2412523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ae7450ddec0256ea325ac886be1377daa2ef5a412ee409fe3b5282fb007741. 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/QZHN72336535.