The marimba ( ) is a musical instrument in the percussion family that consists of wooden bars that are struck by mallets. Below each bar is a resonator pipe that amplifies particular harmonics of its
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 0x0d2a708673ec66d1de2dc3cccde7bf8b478ffa83a02b9b11b8d5d4096b042468. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c01d98b-fa29-4a94-b5d8-4070de206ed3.json and https://artists.proofprofile.net/proofs/artist/4c01d98b-fa29-4a94-b5d8-4070de206ed3.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 0x03ec0e7ad67b49f9c1ae984a4984a6db9f1dd990d0642d5931417cbbd1d4df55. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T20:58:28Z), 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/ESA031514591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8a9879c92b00b063a68bc2ecaaccfa92582133d076eabb8fe89a208252ab6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ESA031514595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215da884ca03552b5c306646dabdfb3038d447b9544b71c0c71718159b25267e. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CA5KR2109696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7d6dddaff750310792521af12b34bc0fec25102c3db0a0c6b313a59a9f67c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CA5KR2109699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a47ba2bc5a9f2663e19f7d81ca464487451ef862454bdc2e751d47e463ebcf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2109705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8883102fb2818ba8d64ece4ae3be986aa2c691b55eb412896c7fc19ad8855f20. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2109706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66264c96497a912e6e099749d76ef411d436af5952677863d8f94c99b4aa0cd3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA5KR2109708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf142a98bcd27d15c25446cb811837832524a2661446fb0bd1b01aadd560f31aa. 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/CA5KR2116053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8885126915e551ac1cf099a9333a618d5039a9dca4fec2f8908cf9aa7a3b6b20. 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/CA5KR2137894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925c4efe9d0ffaf8ecb726363ef0e882530d6dc8d97dacf1c451d6255466eb66. 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/CA5KR2137898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e47925a5698e7faf00b8ede980f77bdc9bb8cdffc501d3df604cc8b43c759b2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CA5KR2137900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4960bf7f72a318a9caa08c2e23eb84eb51dd81624eaa3f0849ccb759926dc179. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:17:37Z), 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/CA5KR2137904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a45b9fb36c226ddc4ef9574a029bbf98c93a18211ac2da43418f49d43cb84. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR2193158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df6d9d228310f4d383cbf71d7f00187a33d9ca66d98cb09e6ee4a0c1ec48ad7. 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/CA5KR2193160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db005a3a0c59e4d23b71e0a913e2e7b6e7994361e689aa7909dcbb999922ea1. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:21Z), 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/CA5KR2193161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0185e2681c0389b33e82d458c2598022e8dded703efec42298205eea41341e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/MX3192102639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e85a23b317174ff54ce30b52ebff628b21b39e9c051cdee4f6c363e7092566e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:38:48Z), 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/MX3192102645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d0de495b9baf487d54c7e37722ef0be938de8bb5ca4027b737b857c121f5a1. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/MX3192102650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf7e9d8122c580c539608acb2a4311c7020836e668e1e5c45067bb4bd598915. 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/CA5KR2327414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a69fd9c4927b6722ee4d38076a28b00629865687d75b260860164f49d5b6d2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CA5KR2327884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64b00f4e5cf56e3b1e68e0f9c97149c0bcc8f5597ebf1aa57694b243f04bb24. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2327896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec3010ff11625d629339609cb35a26ff5eb761d0fcc367b02c7b7cc31e9906b. 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/CA5KR2330646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c937e4dae9437dc36962b97898f3c0b779ffecc20a7bfd8ad33fa82732de4eb. 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/CA5KR2330647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8e737bec342fba7a2fe9ea77d2c4a426ea4656a794c52ecea1dd9fc8fdc1cf. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:10:05Z), 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/CA5KR2330651.
Cumbias Con Sabor A Chico Che Con Marimba