Kings of Leon is an American rock band formed in Mount Juliet, Tennessee, in 1999. The band consists of brothers Caleb, Nathan, and Jared Followill and their cousin Matthew Followill. The band's earl
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 0xe7d4b7fd0ae82951fec236518aee6c8d98c5bd1796afda75701a166c069be7a7. 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/15d8fee8-a66e-4865-9d5c-7af30039a756.json and https://artists.proofprofile.net/proofs/artist/15d8fee8-a66e-4865-9d5c-7af30039a756.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 0x7c27888dca0f246190ee0206d3d84bbad3b0a2c1b8c04aa33d055a18a07265b7. 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/USRC10800300.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd413e619f5a21ffe00efa7644372ddfa1da006d2392b4fd849fdb1d45955ae8. 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/USUG12401154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ad0a1d37470856b721d92cb6afcb27ce337a41d08edebe4c93a931f8ccbc04. 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/USRC10800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c27888dca0f246190ee0206d3d84bbad3b0a2c1b8c04aa33d055a18a07265b7. 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/USRC10800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a9ef1a5dd99b8ae58bbd34b963406b76ab4c69713950e82433c0fcaa1a62c7. 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/USRC10800298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065dc61aa85866fa5191cfd031434fc7cd44540965b115d22bebfb908ef2e986. 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/USRC10401362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e93a9c4f934a8207aa30156bfacf3d1ea5d38955aafd0d7308dced8cf85cf5. 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/USRC10700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c27888dca0f246190ee0206d3d84bbad3b0a2c1b8c04aa33d055a18a07265b7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USRC10800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065dc61aa85866fa5191cfd031434fc7cd44540965b115d22bebfb908ef2e986. 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/USRC10401362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e93a9c4f934a8207aa30156bfacf3d1ea5d38955aafd0d7308dced8cf85cf5. 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/USRC10700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c27888dca0f246190ee0206d3d84bbad3b0a2c1b8c04aa33d055a18a07265b7. 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/USRC10800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ada48dad2ed8d1ea1056a5515a2e228d4cccd46269670b7eec177888f4fb73c. 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/USRC11000683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c27888dca0f246190ee0206d3d84bbad3b0a2c1b8c04aa33d055a18a07265b7. 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/USRC10800300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ad0a1d37470856b721d92cb6afcb27ce337a41d08edebe4c93a931f8ccbc04. 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/USRC10800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c27888dca0f246190ee0206d3d84bbad3b0a2c1b8c04aa33d055a18a07265b7. 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/USRC10800300.
Alternative Rock 2025 by The Circle Sessions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd413e619f5a21ffe00efa7644372ddfa1da006d2392b4fd849fdb1d45955ae8. 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/USUG12401154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dc066e08de14246163d408e9c3f790f0bd9b69d75ef0879680c56cd97bb022. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USUG12401165.
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