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 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 0x0a6f1ece436f59256e76e4d2d5191f063b82db7faa240f12fc361b3bdf9e7afc. 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/fd4cd421-9e99-4998-8097-fb674f48d853.json and https://artists.proofprofile.net/proofs/artist/fd4cd421-9e99-4998-8097-fb674f48d853.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 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 0x39cf86b6b132951d7e491652c76629375c502f89f75c02839a076037c2b9487e. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAEZ2032816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f8ab3af8416cda743db3e055232252d94ceebdf785ab45090f6d1e50307134. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAEZ2033205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25d256f82dfe1e599362143580408b1538bb0792f04aa0e1887e6661bb08590. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAEZ2033203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef4855d538f8cf1c0212d5cd0ce95aaa9b1b67039b2d9e7a6b50b9698cabee. 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/TCAEZ2033207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b27ed69394d190f20c8dcc40c80154b11b9bef0c36749069c7bae21962c937. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAEZ2033215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6670a4bd4d229dcce1947af0512045f7a0ea3f3a64cfaf1231952bdea4ddaf80. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAFY2177948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4977e215813aeb58ebfc0d8609ba1a5df0538fb98435eeaac6e2a43ac62a882. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAFY2177950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc37407a9ede4e182e924d09ccd346a755f39d2dfd3c6f4d2743f6a49854423. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAFY2177961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc43f838cd8cc440ab96959ef460f21dca1fd7fdb8b4442a83197ac0caf34c27. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAFY2177966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061baff700a5d8bd832eef0bca40fe391cd1096e8a54fd6b221a91cb58671222. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAFY2177978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6628e1b9e3297840577230dfd6cd678e0e676411dd07d21bf5fd21cae1c9e746. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAFY2177980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fd5fcd80ea43f26f0a9ec004ae8d1a5f68a752de6f4727f7bfd1a8e26fdc6f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCAFY2177989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3775e8ccc746c68f3e0ea5f5b8acaa0eaa11391e10bdeab57565d76bba1542. 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/TCAGC2238997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2ce8b44f4f729870b3183f88553591accaec2dc7aaf61917646989e96b1270. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/TCAGC2239022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7679dd15511c5cf538e91bfbcc0fcbc0fbce809a194b2047ba6d38a43b7bdb6e. 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/TCAGC2239042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb5351374a83d1e541d8b8f512081a2eab6937d105a0f723d3b085b1f97c7c5. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCAGC2239044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb860e80a8fbbcc2a2f7064dd2ebb75ebf22711efef1367439e5ddd94b7f096. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCAGC2239057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243bd4adffef04661527efccdda881593cb7e92f338df67d31530a88ef7b291. 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/USCGJ2476070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ad0bc14d90bb20e816d12f647ed8252a5d51c45cea01b396e767ab8e59d010. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USCGJ2476072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8833162427df7916db987aceab79175c65c7203e07024d9ecc76fd85a89d4047. 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/USCGJ2476075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455e5ae7b82959de5ae5c7a806ead5648b92309edd181342bfe86a1c5988e889. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USCGJ2476077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e52008f38af634f370d27ddbb5823439d0e0ac6391e726f4d0d871591d9315b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USHM82588955.
Popurri: Teresita / El Poquilin / El Palomo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dec7a530c357d5dc89da1a7bbb5a087b3e5885075cf124ff5bb8b60c72837a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USL4Q2536020.