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 0xa77c38352480e4ad710af8ef9dbee8ff59e9d27e2fe7dd7e4dbfb01acd06d89d. 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/3b9e3536-77dd-4eda-8b70-0ba0aa72c645.json and https://artists.proofprofile.net/proofs/artist/3b9e3536-77dd-4eda-8b70-0ba0aa72c645.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 0x159943e27f18c87c205d41c503d0df7c44fb6149a19493edf219e46bcbccbfc2. 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/CZA650702643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6707f6baaf729988b870c05b1d03320dad8123090b8873d69385083190390460. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CZA650802880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebf4c0b4206c9d6205866165684bff0b4058493ce2c7e2e79bf055a70190fe1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CZA650802881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf684cc337688f7d6b4249e5a4dc093ce3810a719460b7cab1b8d359b0627e4. 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/CZA650802882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ade006ca622082841a515991c74e2adb15c4de2e4402be0ae0ea5de52a15624. 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/CZA650805111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcff7835d90ce9f6a07ef00d5012703b526715aaf225c88506cc2af5eaa3f05c. 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/CZA650802884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fa55159df351c62ab8d30f9c13cab63dc36f1b890e33c37c1684fe723ad312. 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/CZA650802885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74315baeb09395263cb883d8fc03962b9812c2215b652e4194c8cfca11c1e2e5. 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/CZA650802886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0da331d08a6116f07d58363cef30a23691083ea721b08fc56a07bd17bf9a4a4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CZA650802887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1d9fbfcef9ba5bc111152b75046528365a4b1c9c143df3cc3e179f0dfe12e4. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CZA650702672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0558907cd312e338e212123a350e19fd213c28621da8958855e0e4c2b48d49f9. 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/CZA650802883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08556a2260dc20b79c4c77f63042977384a9b9d2b2a10dd5d9be4094daf18d82. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CZA650802889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfecd0e7612424598263cc3a857ff6eb257ee4c7085e34798ce5fac7c467cace. 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/CZA650802890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb531c6073d74e20f218ce696296a15b33a2e586f1f5dd2db27cef73296a8f4c. 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/CZA651000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4ea66e2398b67bc716e43f0ac4cb3b881858b0ff06d36849a552601587c27d. 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/CZA651300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bc1315b57962f7664d80d447b541a5c46f53bb4732d1c2f2d6e1967f2580bf. 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/CZAW21900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6122f3aeccedabec46ee7863859c80cc9fdec34f22052e77c9bd9741f8084108. 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/CZAW21900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf38025325562bf9463c4427db932a35790ff59b161204f07b20e4c5a9ea610. 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/CZAW21900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dab186547ddcb184155ebb79cdba40859b05392f03745257753d55f1fbbcd9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZAW21900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c711a70c90710cfb5baee81342603f93ba6be26bec1379a1ba10d03639d521. 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/CZAW21900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bbb5c53bd5b4f57781d1b2858cb233797e244152892211fd05d397754929a9. 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/CZAW21900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fc65e87c354e694566b7b05662661672d484110b0b5129a40f8c9badf6a536. 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/CZAW21900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6f30d84b76eef0fed6188aaa5c21dd2bdb25524215150cb6ece197ccf0926a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CZAW21900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25934d5ade6ba6288112636ddf243ac7d1ad5216b4c753e712d097baf02e341. 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/CZAW21900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1641dceba8eb08c35c5000b4e8271d915b928d480574ddfdcb1fbf6c5b42a9cb. 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/CZAW21900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cf99b8f17ac82b04f4bf31b97f14f9afaef694501ef3d531dc42640c0aa70b. 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/CZAW21900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aabeb1511ad94269d2d84e33ddefe901e469fad301d5f91403350b57bdd6cd. 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/CZAW21900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa11dbe1c3eb7f80afdbf51cbd203a430cf0c55e80523264487308bfeb072813. 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/CZA162400933.
Muz se zeleznou maskou (Original Prague Cast Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4a29124e2f491a2b1171a54b02dd4e4f2c522aa31bffe6f1dea0ba95f76263. 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/CZA231700397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34056150b6763c8ac0b8b746b8616d7e0932ff292b1bbe04fb46bdb1f403d399. 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/CZA541113621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa1652a74e5eaee0a5d6ef5e76f532ead190f3a8c6c4e4abff01b0cdb44a02f. 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/CZA231700411.
Ostrov pokladů (Původní český rodinný muzikál)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f935475f9bb58430b8c91fbd31b0dc05c1e1de82030415de068175f0db19e0. 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/CZA163302330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8497ac0a20c1cdc0277714e223fdb74b0990e7fd0bfdec1609d276a0fbf2d20c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CZA163302336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f07b5fbd744603515e82246a3f274224e08b90b7ee9634748465d7ea468714. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CZA163302339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8085061fc21ee4da5a15e65cf86421ae46472df69736bebf8af365a8ea295676. 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/CZA650101221.