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 0x1328a64820b55fe9434743b80d258fc6fb3d1fd3fce3f92ee808dffda9a6afbb. 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/c45b626b-63bd-4834-a18f-a27d9710072f.json and https://artists.proofprofile.net/proofs/artist/c45b626b-63bd-4834-a18f-a27d9710072f.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 0x786a57aa7f38f3d4d6ff52ca14acbf72b9f0a3b62fc9e7915f51e86524ac47ff. 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/GBLFP2047080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4edf455735631ce7fcd3e977f3c7dae50509482d47e124cf805f393133c307. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBLFP2041703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a1ab317327fdb9402d478056dcaa243af766470d77ba619d387d772fac6300. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GBLFP2040404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a3245172f2ff400a33bcdb6b76e62468fa4f586146fc542992677d8e50f335. 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/GX3Q92091343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea98d21c93d917f1f90b676ca8db578e71ba925fae1af66711c3215c185353f. 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/QZHZ52053637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff18cfa49620d40eab19a6d1c00c0fcfea7ae333697e7d63cf7f0fad9d7e95d. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QM6MZ2222894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e04bead12bcdf641288c76cb6c9333b79295dfb1e39bf96ae472efde8d79e3. 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/USA2P2408312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080fb231ebce53eeac36bdf5e2f0b3939c974b4f8f130975642c3f60aeefb98c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6P42412306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b12682ea77ad728188f31019d325fc15307fe2fa16100becc4a991c5d091ee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM7282429511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88899789d5a1635323ec89afae135b9a64a7364b982084c95f308121528ad1c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM7282429512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6169427e97f7f5b7e00a42618611efe129059063efd51364e13044e3ba3ea90c. 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/QM7282429516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61b8d39f09a99d19cae9cb27e5005bd80bd748c20960ba1b8f46fbf18671200. 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/QM7282429509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b12682ea77ad728188f31019d325fc15307fe2fa16100becc4a991c5d091ee. 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/QM7282429511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88899789d5a1635323ec89afae135b9a64a7364b982084c95f308121528ad1c. 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/QM7282429512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99df8d9e29321fad4cd97a3c5e5cf118c148e115f4a7db1df918eccb63fdfdfa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM7282429513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4df91a91923361fb2e78d391533af5ec0fd7c1c0fd4200f6f0df19380a2a45. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:41:45Z), 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/QM7282429514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7f120bf398e3b165c4b1393a7f78d55ca82fc77f258baeb3ebdb1dfd768809. 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/QM7282429515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6169427e97f7f5b7e00a42618611efe129059063efd51364e13044e3ba3ea90c. 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/QM7282429516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080fb231ebce53eeac36bdf5e2f0b3939c974b4f8f130975642c3f60aeefb98c. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QM6P42412306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7f1cf7e9fd1e0ab6b0e842574db92387e894243a582c7012439139f6874a7f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM7282429517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303891edeedfedc62e49014140b47236ece14200966e77c6a33bd1018518e201. 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/GX38U2412616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303891edeedfedc62e49014140b47236ece14200966e77c6a33bd1018518e201. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX38U2412616.