Lungfish, also known as dipnoans, are freshwater vertebrates belonging to the class Dipnoi. Lungfish are best known for their innovative respiratory system, including the ability to breathe air, and d
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 0x042eb77caa637e05fed33abfa75715cce679de8d5786fe13636e6a1b484dfb1c. 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/cdae765b-295f-41c5-86e8-c11f335f2ac3.json and https://artists.proofprofile.net/proofs/artist/cdae765b-295f-41c5-86e8-c11f335f2ac3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Talking Songs for Walking / Necklace of Heads
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 0x9322f9b9a19c2e7713f931e305efd95f82d73cc3d1ffd6a373ac210ee0b71ff0. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/US35U0406602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72c9aa912b77eef459dea6321b4fe2ec512d6fccee5945aa1151abe735919ee. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US35U0406604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca63a417e05e047367c65a517ba381a5e752d1db2e4360c67ea15cbe44ce5bd. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/US35U0406605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afeebf76688947800794be13c2e61b68c3b9e69148d15150a47f6beed736f23. 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/US35U0406607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4135448657b08e054fbcb7ba3db4c4da3915cd99ea615244e21bbb55c9dccb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:41:46Z), 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/US35U0406610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77be0c2ad7361b33957875f6a7e13a7eb428ac02ac3c4823d73f48438a70e3bd. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/US35U0406617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bd1f31666ed925d6a52d2d05b19b110a5bd35a4d9d9e0e9e724603f4eb2d88. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US35U0407802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a1fbf19ea21385a3d44d7f1341afbfe67dbf3f3bbf1bc5d9070c135dfbde99. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:21:52Z), 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/US35U0407806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565d3edebe85425f1f7e929e9b4b902ed492b83bca9b6628166cb04f7ec4d905. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:05:35Z), 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/US35U0409201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7cdadf50a7e16fb55717967129635560aab61df0f1422e1a3e1595c36782c2. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/US35U0409701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96104a78b2cdaa14b4bc7c58bdb6e2b75e31dc467f14e2e715b6668f5925c08d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US35U0409703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e59f2ca4a35191539b14a411df72377969cfd9f0eaa00c73ddc164882214de. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/US35U0409704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6b378697c0cd05c9295236ca4b2868a113e87116d1a6d3678ceb45fa86efc6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US35U0409706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45949f3a767fd0b714c0ec17f7c287b76247dcc3b7c6b75fbf8da31667a1e07f. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:09:25Z), 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/US35U0410601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d7bf8f5acda3c60ddee65abeb3b143977590813e526d55dc77ee1c039ab5d. 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/US35U0410608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9f037177880f54fa3652735c352fe8ed3b7b8ccd8e4cc9f4eb5cd3bf6735eb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:03:16Z), 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/US35U0411505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb672b38413888af1cccf0117f04859cfb76cd2c809aefb8adad44fb85b235db6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US35U0411506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e2db7560dc125a11dc0ed614bfeeaede25cbd6ab884883b07f33258de54b5d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US35U0411507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fcbf0a109f783c62701da39c347f1d1a30105206a7383b787f34d4b81415f9. 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/US35U0411508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77cabaa60603854f47c8267cd7990fed1a63dc77989a66c4c06d4632b12b326. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US35U0411510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188322d53705099d7f9566e31035ef89f2d1cc80e5440772f80368ddf7938cd5. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:28:45Z), 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/US35U0411701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c095efc7e9d7d667a276c56237931cc00f94da7ea252846a5c8f741c03cf2a3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:00:32Z), 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/US35U0411703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e58a7614b5375f8680c012130e231d4e97804d34fca0268649f445b4b4e919b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/US35U0411708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f58d0f12c7425f8d450674c8496c63d10b93160d6dac2a749c0d39c6efca1a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/US35U0411901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0105f233cf2432e7608a5577d85993af7da1b7ad1913a637bf9211d6cb18c711. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:05:19Z), 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/US35U0411902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa232005a3a4cfb2ff8a6c6869eb06d6033c281b4bfef9934fb716c535556ee72. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/US35U0411904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fa45617b174209a591aa24b4506dca51a50e8010f4092afef2c6c78634eeae. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US35U0411906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77953f09d2a6cc276ab242e2ecf3e2422587f36ad3e01fdbf97ad17990562a9. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:54Z), 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/US35U0411907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d200784e2b7dbdfb43e2aa1aa1148cc0d5500fc30c0b94e947b96d64c8f232a. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:50:15Z), 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/US35U0411910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b68caaa3cbe4850a945d1890781e3099f50d8cf477ed0f8e67f3692f16c6bfa. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:36Z), 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/US35U0413701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a31e6031cc1cf9d774efb4c97bf16758ca4a695a074ddb0dd6a2842d6010dd9. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:47:21Z), 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/US35U0413702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5355a65a103f845f15884c0ef6c962aed7a52ab4aac843200546e134c6a39335. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/US35U0413704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9247f7d834f10520ca8f5381385e8edc0f37af71f45c30ec043508090c1401d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:54:37Z), 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/US35U0413705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1632cd802406ae39401f31b24e1cee045a011a09c0b910af2e560257828ec796. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:41:43Z), 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/US35U0413706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e393e9465a5a0109d8452debbeebbb0bf48e24e745f7010f2b1dc6bcd149a45. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US35U0413707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9da7b8369dd0d562a90a4fa3f4c41cc2518cc500fb980bb18f2ef3fb9b34bd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/US35U0514701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46a48bf2c370f4a7c388a40057e5954dfdaba0ea084de885bcc32a2f7f8952. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US35U0514703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccb5335002bb7abde75bbb7c8fb8a4b2e4436594801c2e0780a886918d2c12e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US35U2499502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb372c3a2782908509b9c3119f5fcf7b9b49047f15d9521b08064d8e20fa2d5bf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US35U2499503.