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 0x6fcc7fb3ea313c2bae72da22f35775040c9aa5dc6d72eed6e5e8053f47ab5dcf. 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/75e8a412-b31e-44cf-b199-30f77c8fa2f9.json and https://artists.proofprofile.net/proofs/artist/75e8a412-b31e-44cf-b199-30f77c8fa2f9.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 0x2f091779431069fd4a23c60b947f8155e11f2960a1c343710b7774c79d7a2438. 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/FR6V82060496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9889cc8e0016510f2c32b191122002e05720a8244b602af04438be6427bcafd. 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/FR6V82060501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f04a57345a1eeefc00c91f8e0a4a686749b266df7a530dfd5be136e8dd9d195. 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/FR6V82060502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b80bfa8936b54085f93b2144767cf88d1591a92f6754ccef489b5e9cdc84402. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUB731405938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce22aa61b3a82a6cb74772a8d3b8c4154d723fd13911f4239031baa1eb18ed9c. 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/RUB731405946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e67c7390db5979f5c7345336729e90a92f11ba287f232e0070a4e1d77d82d46. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:32:28Z), 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/RUB731405951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2488c34218ca38301d38401573ea1fc2d669eef10f3ce37a06fccdfad6af71. 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/RUB731570896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1d814df88d69ef9c921b2c609496ebba6a84ae44b9a054ecfa10beb1410ad2. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/RUB731578876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069adaaa73183dfca171ca30db81aa6067f9abd4242e07e602aa3d2e3dc990e7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/RUB731511159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a86a637198eee9e259223b5d618da6c7f24b6e1ea836f853e1a5e58f23e122. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:28:22Z), 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/RUB731578748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506e2eaa3ae517b420ea3467aead22376bf70c63c52cf1afc02e7347008f9fab. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:37:29Z), 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/RUB731578788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c44477533810adc6d31c7e94ddbf7579510d39ce444eb12681c652be583743. 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/RUB731578798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c0e74b6592e4c687d68653c0f3fed7738d2df64eb910afdd48878b7279e429. 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/RUB731582588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0227c97a41babf4e00aaa098fb8f40186c629588ec1d3972cc6ca9b65dc37577. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/RUB731582590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39425877c30ca8bce33e8ec8f0de20e81c657187aa834b47c402ca06d84ff17. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/RUB731582594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80a45c158ff8885dedfac7cf95f96a87043478ab08504d76613366f29a416a7. 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/RUB731599181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f0f1e7739e04984e271b7b1090faa7931d363e0755a3ae4b37dad8b6803e3. 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/RUB732060603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209f0f1e7739e04984e271b7b1090faa7931d363e0755a3ae4b37dad8b6803e3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/RUB732060603.
И. Суриков. Колыбельная песня. Игорь Мирославский