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 0x21c47163d55ec5eaf64c2ed3aff7b22117381a7e0421d5b78791eeebad6cf9b3. 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/362af8f2-b82e-4e40-b6cc-9839e3c8c5ac.json and https://artists.proofprofile.net/proofs/artist/362af8f2-b82e-4e40-b6cc-9839e3c8c5ac.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 0xad733e13659945084dfb7e37da368feb985cf240a0bc7b340cf168e3722e3588. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/CZM901600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968e49676b5f329fd5d9ab77634d5a4a17e566c9209ed2baddb9c238e588ee1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/CZM901600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6034de9dc68f6f8563679b3c244c0fd4f478865f0771b8e0594a3c1492b257. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CZM901600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbc349a494600d1da87775ccd46e0c3f78aba2ce7db83ff682fee16d0f2ab43. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CZM901700038.
Děvče v první řadě (feat. Ben Cristovao)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc5bb943c121f9efa8721c2b39c6d5838400fe76252ad53dee8e27c580338f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/CZZ992000266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7793ff2f9b951facaf3a46aa86fc095da53996be9e9e512b61798543e98c86. 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/CZZ991900403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf78edd439179c192b74da16cc0f6ba54c28975bbb10b477b137b0e766562ab. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/CZZ992000460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9decb11a7a147c17b9950c5365c4b706ea5c37e648d9819b8b5455767d46903. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CZZ992101566.
Podvod (Píseň k filmu Shoky & Morthy: Poslední velká akce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41846a6b7eedc8fb6a8fc9d90fe7946031d53db0be0d92ff82abae20404887a7. 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/CZA232100665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b54cc5195e86be74d174ef8ed35e511c8ed38889bb6fd4f4fe76694142bc5c1. 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/CZZ992200245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93809c4959a59841651e69a55a522559e4fb1b0a1dc35c7d5181fae07de52ccd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/CZZ992300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f914fea1458b35212d86a4eafc23afe4735587a4f1ea6a9239e3886c450f212. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CZZ992400492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5f3a2c980ca97f64a9fa55ad4833c32836f7e1ad9284883d2335d273caba7e. 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/DGA0M2301120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe781b3caf144c0de8734b4f808744414f1904de367ce5f7e3603f5dfd0e647f9. 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/CZUM72300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e88f303752b561024ac27df8cf4635e2f177632acd5a554cd2960e89363764. 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/CZUM72300384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d907622eb6ad77563a7723d99b379e66962c14880294d2bf71c272dfe74d1b. 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/CZUM72100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1884a52b4cbcdf675347caa4de8642119e6225b3d7d772468a7a96d5920dd066. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CZA232200136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2ab816e347c58391ef94b3ac5544ccbbe2b2e24962c7f3eb6b410ee2109f8a. 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/CZA232301263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0f7ef23ea922e03394a65cb830b24ae4ffdc90778f79ec5d11c9449f421e91. 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/TCADI1751710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0298c090316dfdc11920daaeef15c16363df8ad7e0478a7f7be54b3265048c5. 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/DE1FB2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc620ebdfeaff629e11ca4515bc397bb531489b2ce5b129b38e2fb02f9fa21151. 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/CZUM72300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4466ad3699a4aff6c606d8d13ca17f40b61271e5e79aa8d5d7b2b8cb588a02b. 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/CZUM71800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57643ff512590eb4ad3619d24790c8ee7ca15ffddc43d96e5a8beaaf3ad2efb8. 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/CZUM71900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa6db0f57c382175b01b2b5dd283b2983f32024d9938ac4513cb2e387736451. 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/CZUM72000335.