thumb|In the 17th century, mercenaries were the backbone of European warfare, reaching their peak during the Thirty Years' War A mercenary (, ) is a private individual who joins an armed conflict for
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 0x4c4ec8df659bc23651c088742d5ab4cefb61ccc42060335f22a67dead7b07475. 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/00c12123-b81a-43f2-9db3-71c31dd7f3f5.json and https://artists.proofprofile.net/proofs/artist/00c12123-b81a-43f2-9db3-71c31dd7f3f5.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 0x7ad7c9f4e1a5193b20efa4d620b361136cb95003473621e3c91be4a484ba1940. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/GBDHC0404962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf00e49bbceb1b2ed9fe1d066e6b6f5299938edac9201f1aaac8cc9275ca6f28. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:08:45Z), 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/GBDHC0404965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d24486d3e6f7f18ca970108a5be57575e6d7fc161aa5bdb3ed545ec866cbc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBDHC0404968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25521ad7c60b28c5a87ecf2b6101af2651eaf3c986c1671acb13b241323a827. 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/GBDHC0449611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac7d9e43d7723febc5d560c0aaefa97871c6db87728fd091b88b594f2db124d. 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/US4E40629602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9400fe3d508f248571ba57a08a43df48ac4875c1d81983d4381a61c985e366f2. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US4E40629603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2f0f3520656f192b910afa4e5a52974d030fab1c337fb87baa329de33fed83. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:58Z), 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/US4E40629606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928c0982499317d5912beaaf556c1b7d867cdb3defdcc3ba9767eaa2b6ab1043. 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/US4E40629608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a6866e60080dac168160073d77aa38d3d278b122667365b67ab4103342e9fd. 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/US4E40629609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81949bd56554c3fe7c9498b22b17baa9f3ae3b54ff334bf3249bf5dbcc2b7b89. 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/US4E40629610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665bab680b6be471631d12eb5d1c338266d1ca87ca4b2285cb9e1a66c61fe9ad. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/US4E40847301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d46d720994062e85ee83e3e434a586e2303c59aa668e7112a583a1a9abb181. 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/US4E40847302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77c32ecf220c4365b29a824a6bb4bf37e2a1281acbb9e5b0c8c2b20dc2bbfb3. 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/US4E40847304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad294fb7aa7f913f759cd3a9f5cd60a093deb37d0f973f05762672461058c5f. 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/US4E40847306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e08921c243ddeb5d1fee399e226ab16171039bf4015600e8698095f2e4f4c37. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/US4E40847307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f7f89da48dde07d50cbb03fdc21a38bc451b9df074c6b8692546f83cf2572. 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/US4E40847308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7f39ac7bd33d0538c09431c7acde97dae4c20e3e1cc4a7f24dea3749377cbb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:47Z), 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/ATN261100801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77db86295a34de32eb7228f722b4d88a4c4282e77e06966510697ba03f88d7b4. 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/ATN261100802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99aab64152fcabfb82dfc662579f3d2d9c322982a78bf3efd685827105bb0e5. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:28:13Z), 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/ATN261100806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd59fd88c1d7fd074a05546a04809a004d1a60f4fe40a48e6cfa58c3f52b001c. 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/NLWJ21200703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b04501a6d2641f324246d016652f73d0626ac3c3cd1b5ce5d26f0343532f8b. 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/ATN261303401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c74f92b45a6657379ad8a5cade7257ccc85178940ec9b4590dfc62757feb3e. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/ATN261303403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116e329c1f90c8dc8e467c2b3e5f9c10193d0c9033d9a813413d13269db8cfeb. 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/ATN261303405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d4a74199d98ce0977f3a18a740bff4d746c30ac14dd6b3d33ddaa6ddfe3a6b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ATN261303406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f4ba2ff64bc2b692ab7067c6a60f7c773944531bab989ad5344a755f4579af. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ATN261303407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc35e6b20a22d188b81f8d6aa1e0e46243c1f3fdb4a1ce85524c5d53ef8391. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATN261303409.
From the Ashes of the Fallen - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4e4fe4e33e5f76460ac8979e38e231ac5b185653bc2636c00ff0f2c0c63e95. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:11:39Z), 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/ATN262007701.
From the Ashes of the Fallen (Single Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49df3ba7ef948816fa8a1ac539b23ff39fe4fde356e090c170dd4866f95a9e7a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ATHY32200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd8c7a15965129559f84f9f7ce0f2f184a2518efdd623056d03eafc7c1d20b2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ATHY32300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde89a1b47dbd6832e69d98d3289c74142553e0f20b3dce81aa3ec09a82f05186. 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/ATHY32300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd8c7a15965129559f84f9f7ce0f2f184a2518efdd623056d03eafc7c1d20b2. 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/ATHY32300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503fdd57f62496c85b059c63a4cf658b1e405507e4015667e385dd706e817ab5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:31:12Z), 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/ATHY32300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c3d7d66019a22a39b5ac27e89729f3a5cb5ccd3d1901cba56eac6ea616b074. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ATHY32300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e5dedd87bdf7938ccfedd818a69b3bd66eb1642fb37d45af9991a1c01fa130. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATHY32300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec40d7827a2d0da30d33768079bb83c4ba736bd1009ea8c0f6eb9263a8fbb6f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ATHY32300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8261aa27d92d970e925509af3a82fed45b9baf7139f4e37b9739c58439a22a82. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ATHY32300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb026622cd0d6c0ad5384fc30d545a316014056cb4ea8733d60967183a432196d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ATHY32300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a86a670deccc50ce48befe17608bf40ae03eb0bc162089f0fb1c79489a079d. 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/ATHY32300011.