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 0x98ab3cbd65282ca8b994141805ed69d7873198c4d5211b2f43f4c4754a09363a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e898efe-224b-4ca1-a66d-dc04e4aa5861.json and https://artists.proofprofile.net/proofs/artist/5e898efe-224b-4ca1-a66d-dc04e4aa5861.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 0x9ddb75e58e6a1d7ec7cb87620c7e8260d2a563bee449dd191e5b3cbd67c668f8. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USDY42110708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4cd525e574a8e3ea388c7391914b58bb129b0c6ca2e7b76e968011f0adf026. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:06:22Z), 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/USDY42100083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc50617d6bbd631f8f518fb79353a654758d7df985a4c471a8b938313cd3d70. 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/USDY42100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0026e801bfda78a87223eba12f9a198366e4e872026f1dede25464c46f0e7e26. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504ca764406f4b1fb933735eef0afa40dbaf2771e512a3a6a82785a0232acaae. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:35:46Z), 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/USDY42100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf4701ffdcd466a82609e1ef528599d7878d5723255274fd4dd4b6fc4407260. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDY42110746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7419f32ffc9ba40bcbf8c7fefa731a910b50aaa1c62cb94b6e8169967b43ae9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USDY42110748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130da4b84d47f8c117691a569239a7ee090346fa238b55e037b334426ba800ac. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USDY42110750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756b382aaa4674a7b6892a2a0d56d91a6305b15a85b6eb5409db93ecd26ab6a4. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USDY42110751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04481e6aff0d4abc0c3f810a7d78b95c4dc969c4134b010680359fcffdfdc872. 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/USDY42110753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6522400661fad08241dcc0779403a21a702e6234381f9a53dd4467f04ddbdb3d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:33:59Z), 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/USDY42110754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8d587ed1044b8d62d4b38e80580ecc396a3495ae61c9dfa5b80765d68dc695. 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/USDY42110757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08875e9657b45fbba72cd540f2d80e3e2ecb22c40c1a4031ccedbef971124a8d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USDY42104280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ead49ca329dac5a1808ead3af61be9eca0138094067c3a712140e95a79cde. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USDY42104282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41f5bc62e16c4ed5cd1a6662583d3bf1413a9bdda03f4f27ce52fa7d829f6b4. 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/USDY42104283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301d462aee7fed3d183604f1cc19c7e19d72e6795e1908617d50e2182a820bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USDY42104284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d381700c4fe0614dbf90e9c8a4dbe2932113383d6d5d68b532e24b6b4b87691. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:05:00Z), 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/USDY42104289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1de770543be267f217c15ad1be9c728b283521467b9f08846f05877e91d3b8. 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/USDY42104296.