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 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 0xf2c1ed4a841ba50f8cccb8b25e0c06695aeb1bfb7b244162788bd52e9d5f1f8d. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b941ed4-2084-4496-8204-49f8ae9cff5d.json and https://artists.proofprofile.net/proofs/artist/0b941ed4-2084-4496-8204-49f8ae9cff5d.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 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 0x08f97eba84c97645ab66eb23ff6066f999a74a6f243ca9bcda568ff479c55af4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWY2266949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205a584f1067537207ae5ae4911c970fe49fb5b1860e7792e9ee73c9c6e1fc70. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN72219839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ad8800c9ec3553be3435d7c08cbbd26a7f679a8c290dc251821cc3cbbf8753. 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/QZFZ72263436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230630fb2f21ff41c6a58cfef4503439ec0a47cabfd29be49c901a1fe6e80d49. 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/QZNWT2197110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb71486b2c3f3b4936d9d0806821f7010991bdc94327e51ea8b4b87f6dff784e. 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/QZTAS2230336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01f3d6d55c9ac988ae2471a374a72fa41369f4005bbf96958ad149ab7ac3a40. 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/QZTAS2230337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02801647bddc4d795e50ce9f3b6225b29623a4a9feabcd716f69adaa8ce0c29b. 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/QZTAS2230338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f292052641f0a2c7d31ca6dafb360682994e58823445ddd85ed7d792de1c90. 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/QZHN52295293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5676c190af5de630bc00791d0fc506ce785132d0d5fc6daca4a2d08dc7b2b84a. 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/QZTAS2230339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb166a2fdfde191c42e8450dc873bd9c2150828d1e9731f4dcb68446ef3a064c6. 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/QZTAS2230340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9f9ff8b26a22b1b4fc97e065c192ed1877e16cb73ef6f868093cfc99696948. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAS2230341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d92fcdf8c228c4f6e3b4075c0cc9675923e3ce17618a005e43911cdeeb2c34. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAS2217117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf290b5d8dac6976df746baa4a6999076fcbbfcbafd5084755a75d0d34827326. 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/QZTAS2230342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd427ab6e8baecddebf23cc3f0c51565a9da79b85f69fd88537f3c7d58eeac42e. 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/QZTAS2230343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f97eba84c97645ab66eb23ff6066f999a74a6f243ca9bcda568ff479c55af4. 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/QZNWY2266949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764a259e6453e0fb0a66850a1076b878d94b0eee6869319b411a872f0ec46cd0. 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/QZTAS2230344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7368a20ba94023aac480590c7bbd43539577d133a62c1cdc48292d2344a58a9. 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/QZTAU2181501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714a974c54dd57fde33a0e4e587436de74131e9ae8d3e65ff37b6dac1d17c27d. 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/QZK6L2263589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714a974c54dd57fde33a0e4e587436de74131e9ae8d3e65ff37b6dac1d17c27d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6L2263589.