A sleeper is a person who is sleeping. Sleeper may also refer to: Arts and entertainment Characters Sleeper (Marvel Comics), a Nazi German robot utilized by the Red Skull in Marvel Comics The Slee
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 0x6283c4f30edc8433501de42179caadc8afdf5da96db01b8dccf4b3fdc40b6bd0. 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/e55960a5-72ae-4e72-bb80-77575cb0cd23.json and https://artists.proofprofile.net/proofs/artist/e55960a5-72ae-4e72-bb80-77575cb0cd23.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 0x2abf06829a764cbb4949a7341258f17f57a880c4567b3e7a96a2758bc6489059. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GBARL9400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d74132fe6e91d20e8497ad57be3a4e67bfca8911b06ecfce9219b06ba4f7d. 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/GBARL9400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564cfdbe97629cbac55b533621ba35feb7e41a9933946ce5225c9006f491a130. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBARL9400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fa5c80aa472522c15faa84e47ae0f5b96c519fe7a96c5a4605f77ad2f19590. 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/GBARL9400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abf06829a764cbb4949a7341258f17f57a880c4567b3e7a96a2758bc6489059. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:45:06Z), 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/GBARL9400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534115b5956c525f93ad074a89584ed232eb95758edfcca770502f68cd6e76d3. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBARL9400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940985f7c8560136df4ece2050c0996a51de6fef69835adb2b6b6fe946818bdf. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:36Z), 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/GBARL9400401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceef4e55a99ba7667ae6fd144dfbaa73c1c8038958ca6974f95edaf3d6d5729b. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:55:48Z), 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/GBARL9400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde044cb91af03115199ea6b19417044262bf05a8b126a2505170dd3f2e9fef8. 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/GBARL9600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f63c620fc34a61aeaca2a4486e24acd897293736e41c98f73e170387b8b49e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/GBARL9600074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d388789dffc2d2120a93c0d3f57b8167557e289c559ca16f66a39b322e96f9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBARL9600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd92f45344ef78779b52b55ce17cdc2abc843231d96516eab30aa2f1d7abb79. 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/GBARL9600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6806dd869f7febbfca0180b7a55c0bf1a0194dde1113eb49ca1bb706abc42da2. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:46Z), 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/GBARL9600079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141ef5eff6d13ba821d75d731af3cf22da5a3369b1568c7f6b45e22f61ca4563. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:25:34Z), 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/GBARL9600083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534115b5956c525f93ad074a89584ed232eb95758edfcca770502f68cd6e76d3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBARL9400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721a29397f4c6798fec4a2454e5734833b7320005e569417bd7d55baa91499b5. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/GBARL9500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cecce6815ee6d9dcc816035c38f2870b54db7be21cbdc0f7a8c84d92a01c996. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBARL9600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5415974a9e0f46a2a553efe6c9bff1762b58235ed45a24582ac9138cfef95721. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/GBARL9700370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c100a95b0645481c40e296a892458b415c62c97df680612b1bedc4bd5951b2. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:30:18Z), 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/GBARL9700361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564cfdbe97629cbac55b533621ba35feb7e41a9933946ce5225c9006f491a130. 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/GBARL9400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abf06829a764cbb4949a7341258f17f57a880c4567b3e7a96a2758bc6489059. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:56:15Z), 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/GBARL9400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e404815600df5443889d18d55c4230353ac06225b7a045916981383fe144f5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:49:15Z), 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/GBARL9400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6be9dfa121b071f6c921ec92fb2e5b13822626914a0f530e214036d306806f5. 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/GBARL9400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde044cb91af03115199ea6b19417044262bf05a8b126a2505170dd3f2e9fef8. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:24:23Z), 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/GBARL9600073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d113af79a6d68deccd1a33bf74426f96b03b5d5dcc5ecb367524d33e0286af. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:49:25Z), 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/GBARL9700373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fa5c80aa472522c15faa84e47ae0f5b96c519fe7a96c5a4605f77ad2f19590. 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/GBARL9400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9b34f2e840c80415f8a2f3c60a074f2695c0f34d7771af03845ee8fd84c08a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/GBARL9700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575861e7e4755253806a98e7273141df9ecb0bde13dcdb5975bcc0926f05e6b0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:49Z), 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/GB9TP1800754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044213d02a5efda3eed02b0e1707c0f4347e08dbb79d37e5403f8a8746162729. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/GB9TP1800765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9552ce71a76443e89a3721e488e3b5af62e8d9ac0349bb34cf25c6faedb6fc1f. 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/GB9TB2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a9a13df84a6406ca72f074017b3b9e1fe7eb146bcf7ca7fc7d09b25eb9f8d2. 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/GB9TB2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edf4b4fc69d332dabf875ab58a8edde0b81e48e85eb1696fe88d2bb32c3f171. 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/GB9TB2000007.