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 0xc865dba6260dfe95a1c6bbeab0f60c9078ca4496d42062a8d7bc868e73bb1f62. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/859d21d1-bb42-4279-afa7-f71656cad326.json and https://artists.proofprofile.net/proofs/artist/859d21d1-bb42-4279-afa7-f71656cad326.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 0x7e842683434b476cf7538b25fd7ac22c91aca143b606f0aa4b5e091049ffe885. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/CACWV2227178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32afdb91727d5080b983325037f38c3d84d6d73ab6735de17367f3323abe2338. 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/CAENV2091258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8787d243f5ab886bbf5a933d4d94c27b3de2f1c8180430377943ad861360cda8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAGOO2005015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c443df9249d71f18182e96b1fec044190aa1fd3aa61f6de7a09c40c8927314. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/CAGOO2034102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb907b2b14bc13d6f61f20a0f35ecde08de246ef0432fc5501eb8d08784b606. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAGOO2034104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecd4fe8e258267c274ca8fe29a0194d6f2922be373f37b17f83c9ec8ff2a42e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAGOO2034105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a784eaf3015bfa46c12de2116aabb91b149df6bfa7cb8a1dc008a6f4387714. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAGOO2034106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228c421e929f8c0d9c3f4b5417aa71910afde984d967e00db9c1ba83246d5006. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:55Z), 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/CAGOO2034107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273510e6fa0700db639f25d67c77a16e399973e1787b10c47141a774c1208005. 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/CAGOO2034108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff5afd3917e35efe8fbee1bc5a0a63bc10c1d196b17d7d1c876c212a8b33ff1. 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/CAGOO2034109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe3d33fef3ccf643e58bbb4717b827c67b845986eb0046ed6ffa468f740f396. 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/CAGOO2034111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de4d48fdfd7cf93b87172041743b7921cb9aa33c653ea38e8fbd2fb45d3f29. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/CAGOO2034120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370aa82bb4a52210ed3ac50c2f16ab24556f948091880e1544c0cadf087f772b. 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/CACWV2224875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434216c2acc20b438fc3503e9616c15e6284c444bdbb2a42f9d5ac723acc1adb. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:53Z), 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/CACWV2292067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f753149c697804a721bebf9224cae5e4aa66355c92bbfcaf4c341a39a5e631. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CACWV2380516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d87ab3a052d7ffc7a07c9077dfc9ee3b883f97a0bfaad6305dc4748ede5e07. 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/CAGOO2425673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e49c670703e5d47206175ea2cd9a63c08dedad3423632c1293ce0554db5e2bd. 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/CAGOO2457599.