thumb|right|upright=1.3|A modern claw hammer suited to drive and remove nails thumb|Cartwheel mallets with heads of felt held between steel washers for use with timpani drums thumb|Detail of the head
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 0x1beed3003bc5c29af14b6f1821e1d49cd4882100d2a5b0b043c80ee8822a323a. 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/9cf0180e-e0c1-4ce4-afbe-b9ac4c0a020c.json and https://artists.proofprofile.net/proofs/artist/9cf0180e-e0c1-4ce4-afbe-b9ac4c0a020c.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 0xf55f964a68b131f3a20b0568a926543128a8176ae88d67735bbf268cd2bb562f. 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/DEWN71700276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3b0de70b2dd37978bef91b2858e02c7a84e3ac3873d71a786ca5a1bbb92bc8. 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/DEWN71700277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa10a7996448e864c295bc7604bef42cda3660711d3f8e5f5a4ed877775c152. 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/DECY62000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2b51307d4c39698ce175625639bb692a0cb4fcfcd7d2bd53ee49985392bdc9. 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/GBVHV1500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e8a6bfef9651b72d27da807f28f20c6e4c184e3421573c328c1d4998b41b0b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBVHV1500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff84ceed38f7b97a944865ec799338ea1680d7e75ec570b0cc46a787b98f29b. 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/GBVHV1500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d109254b81f82a79716237a2a010ba95841e7e1b3d11f76c451242ae0b3fa5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBVHV1500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af215a6f966624f002e0518db9866144fa876c8564fcc3dd075ba896c6b1294. 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/GBVHV1500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1771d185f3074a8a23c0e71ea0146a474cd6ad8c539e3b8fc50ad58e7924f2. 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/GBVHV0800422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6a56ac1637f32cb7f7c10bf887412ba8a15e02e84825b06c85ddb79b9f9240. 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/DEWN71700272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe790d5bd0cc9501dd0e3b09f45b595a0e777659efe28e6ed04deafd6845a8e36. 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/DEWN71700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49829555aac30ea6b10ce56a173d4eb30652dff74975b893cbaafc30ae1086e6. 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/DEWN71700274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55f964a68b131f3a20b0568a926543128a8176ae88d67735bbf268cd2bb562f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEWN71700276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006faa6d2cb36493032fae9e36cbe5314a7803d492bcaa15861d3b6701a46f25. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEWN71700096.
Red Alert - ABSOLUTE.'s High Alert Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a4f4653ad3fbe8aad10bef4f914355ef37f231f2f83821cf3f310823a62f84. 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/DEBE72400295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb9a4ebcdd184d273eaff1dd14746220e000b48e199935b0c5689d2f16f7917. 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/DECY62300136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1e0e6922871a667402013a44548716e3a16b46237f539a616bed78c20b3d54. 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/DECY62300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aa9416f7b9c0fcad9ca7488b6efaee09b3b82b19c84859105fde76aea5cc32. 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/UKN6K2200763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4580d5cb19957a8b5fdb8e5483b699648b15bdae83e722d08521cef6a3921a. 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/UKN6K2200765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d4d5b25befb5a86104dc10cf82bd90ddd558326c37daf58270df3b7148d406. 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/GBKQU2261225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812f77bd9a13f5cf6552380b74e79db265cc71e366a6c9a89df720dc1e1985dc. 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/GBKQU2262764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2545dde68a2bf151de884dcf414b54a95f6bbcba1b64aaa0022af93ab61860df. 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/GBKQU2262765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ab10799b45272a89a112f8d2ddcd966cde4ce260d681b67b46f867330b553b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBKQU2262750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1036beff628a0ec7101aa58ab30340a76315581b9ffeb812629fbeacff8f61ac. 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/GBLV62109533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0f3aa1626acae8f2ef30111932e61e8b2028b60283b3479f789ad2ad6b797e. 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/GBKQU2191777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6f4c30692b6e769f932b931b8a405a0b634087135d58d86621e73c0ebd9d80. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2124654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7471563d0560866d3e2bdf986f002ec4f0aed5fae3ede0193890512f0e0b56b. 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/GBVHV1500151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4135edadd86725ba743081037bc790d62507e3fdc00e39bd96683db682f397ce. 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/GBVHV1500153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9130e11fbcf57752278296eeb5d04239f2e1a363468e9b125c36d3e2eb1968b8. 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/GBQLP1901053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce327b6aea264bc8ed550ba4f19d5c97ac3d77c7f10fe7ec09cfcc48db2fe2ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU1890343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865a863dbdde374dae39a3946813e0a2cc85c581dd6cd31d7c5ed08e066c47b9. 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/GBKQU1890344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede4645f0f0dba8b4dd6a1d1c50840e3b9927598f06e5ec66d224911dad55eb1. 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/GBKQU1890345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03a611fb4ddafe3adbba2c4b0af1de703833bfe83a5e63f7ffd38743b6e631e. 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/DEY471729093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eb4f26bb1927ac404a525f5743aacbd742ac51a7012351f8bd6fe083b32226. 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/DEY471729094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192c1bd1d758f67edde06d964d147595fef9344e0d8f877ff71b67728dc37d62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBVHV1500107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c362b0a02105c7875cd4902ee4fae17557eea341382d1d7b1789d50179a592b. 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/GBVHV1500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b55575e987907d8df17d5aa6f1361c286884b2bb5d07e0576f4d4ba61588bec. 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/DEY471710237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddce3873589fa9215bde7cfe8ca08b7e06a7a0e10315e605f72192352d0774a7. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEY471710238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5adef438933748e9f395d37866fe1b4e51cfb6433bcd67c59b4cebb48c28404. 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/GBVHV0800416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf689fa18bdcbbadfe68ab92cb31c2f93b89710b8215d40f077faa76384832d58. 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/GBVHV0800417.