The lungs are the primary organs of the respiratory system in many animals, including humans. In mammals and most other tetrapods, two lungs are located near the backbone on either side of the heart.
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 0xcc95bc5edcf284a5630a32d7850d7c19ad735295fbab045104111c0d9027f46c. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/def85a9a-d7fd-42e5-b469-594fa198221a.json and https://artists.proofprofile.net/proofs/artist/def85a9a-d7fd-42e5-b469-594fa198221a.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 0xb15c35849f9b51cdada31d636a7043448246d498fcca7b44902fbf5742ee7ded. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QM4DW1756139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945dd387dc68855b8777cc5a3201ce71f87cbcddecca5e71cd2b41a5397b7713. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QMZTB1600356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87be0be981f8c899d480fe9763992b6d370aa7752bd6c79c87e59d89c717114e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWQ2244202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a0b0e6b3ae984754e1f4eb777e85cce1362f49ae01859a5fd6ee5663d6149. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZVSS2310013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd312b8712163fcb025f1734198da42a7badd07fe761f92a04a150cf901789aec. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USA2Z2500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3e39b7b46a68149f16db6e7b753116586026d2116f728208b08354c45abe15. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2Z2500428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6455d8992968958feb3707e563841e37e803275fcef71290048aa89d4e1e9b6. 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/USA2Z2500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd312b8712163fcb025f1734198da42a7badd07fe761f92a04a150cf901789aec. 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/USA2Z2500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd316418180c2f0b3690fe144a1db4d88170e95cb30e876113e9ad981b8a6c2. 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/USA2Z2500431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee26ef67ff78f34865ad2c2b125a7899e51122976aa34a28b4608dfd5328135e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USA2Z2500432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbc795f1c8fd5f1134d942f5431f0d70701c69ab481c2051f2b3b3b68d2bd2c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USA2Z2500433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c034f202da7e2cbbebd1c2f7f7adbef5441e6370229c0853c87187617a14445. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA2Z2500434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f30dbf509ac953649c31d409057d5bb10e68b855fad9d32d7b4ad93c01611b7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:07:48Z), 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/USA2Z2500435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2662c777e3cf8163d6fc5e5e0f8313d533d2f0f1b9cae38e58eb598056a369. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA2Z2500436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bae488e1654f61d9a1717f4cde1c0515362e65c4b50f9763eec2cdbdccdb90. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA2Z2500437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe0626bfe114465d64d12c2b050340cf45c55612ae9b1b8255de1a0a3ef60bd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:54:41Z), 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/USA2Z2500438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b50dc8e8a8ba01f033c8bf8c1ae8f42890a38ccda918ec24e3f823f4ff600cd. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USA2Z2500439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43eabff623207b9365aabeb710aa775faeec2c36f6dbe498daa8f170790f43d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USA2Z2500440.