The skuas () are a group of predatory and kleptoparasitic seabirds with seven species forming the genus Stercorarius, the only genus in the family Stercorariidae. The three smaller skuas, the Arctic s
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 0x15f55ac950d67cf1806e4e30f88444c0d9e882a6fc5e17b90a21af24d0c92f3e. 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/08e6c2d1-0214-4987-b356-079c0dff5358.json and https://artists.proofprofile.net/proofs/artist/08e6c2d1-0214-4987-b356-079c0dff5358.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 0xd090f9724aec39c432912b455a03708095b800a14d9d1a6d99d91039580b304c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US83Z1769801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38dcf4b7e235c83de14d1d29dd0716c9fda18c31edadbae69c1c171783e76b0. 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/US83Z1814750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0da50d1e7a308b9b5d5cd31783361c0f752ffd0c1a120a6763eb94a5aad256. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/US83Z1814751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c01bab2e759211a1a01e2e9dba14b5f8ff5f71b0ca2693cc911536b1597639. 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/CA6D22100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d246418eaea671374b59b2b87ab0bdca04e87e86e54554a62441a6b49fbd2d. 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/CA6D22100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca22657380ded460220cb8ece097f8b29800bf85ffc7700b29a0074763494fca. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA6D22100158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1fadcb60a2d934ca814bda0a3780e7f7312371740d5697e5a0fff0e51b097d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:06:21Z), 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/CA6D22100160.
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 0x1664200f3189595a7bbb1520b9b21de74938682b3f2aa0fa21b7736dbe31e7aa. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/CA6D22100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b81ccb255cc82e472324ffe65ca091e6231fde8a2cbf96db885e41cdd26cc7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA6D22100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1990f108227a5edf87d960cd0ea5cdc95e4821b87f9ed56b2ce62ee057903e. 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/CA6D22200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8284ff9f1cd3e2452f848bf8e70a93db8e7493a16d1b38287fc5b41a30c9b2. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CA6D22200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dfbee86872b2ad647e3410d7d175353655c7f1e0d527cfab65a1a216f8eae3. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA6D22200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0955010782e7045b789daed3d9905714a68a723433d9d0653aa122c6173cb. 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/US83Z2222396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6ce141aaef5d28be19a55fc2a6a321959562af9b56985ffd265522cf211d72. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/US83Z2222393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174b836752317f5c75b8e9053c9215cc25315f5a3bc7ccc8a5620c8d2a0c078f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US83Z2222394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7a60ffc731bfdd97379113ddec61f4cc934fc6c506957d85fc5b7da82b17b7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2355653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b16f74a8b48e993a14da225f8d31d9bcc26812b73cf9285b60a94f3f7bf88. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2355656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4470a6a454056874b0f5a74d6ecfa6791c82fdeb21336af895bbed91b9a029ee. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z2355654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf7c677022df24cb2ef0b6e3d958bc2ca75b680c6f28430f46cbff42c208861. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US83Z2355655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce4bc5a52a149d4d5e8ac43cafc22c03a04f1d39f0647e0fbf490ee23d98a94. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/US83Z2535632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636fcb72a18d3895eb175c130c9d6af0b6763fbeaf865fee5cbd8f34a31ff27a. 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/US83Z2551631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952287864386fbf687adcdcfad72061ac6de4bf99ccdf224298d48de1e64d931. 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/US83Z1655814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e99e085185f86713753da85c279976a2f33f2445fbd4e44e83822de5384a74c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US83Z2001877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3624f120005a0b78af012baae5304b7bcb9abafc40e365108de4b1ce643c06dd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA6D22000388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d69f3c564d7e6388ef0d20e37607b0dce4734f54dde02f2d7517bae5722f72. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US83Z1828129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb240edd1ebb3e4f13753fa82bf23ad7d02a7e43de224dba3d1d6827d2d49d6e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2133149.
Until the Sunset Essentials, Vol. 3 (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ab68cf8200948d44edf9572da48c98471b93bb31ca9930114bb3dd655b3860. 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/US83Z2222397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0892f19ed87e5915acebb060b6d0283c22701f3ba9756c2ef4737c706a6b0746. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US83Z1909909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffa2ffce3406e3b7463ad3e63c94c943bc9dd0cabefdefba92deade6189cc9b. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/US83Z2133152.