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 0x4c8286ca471dd414c0e061767ee926a458faf06df3be6287c01e096f6d361d6d. 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/23e7e15c-6c01-4edb-8926-ac7b3c8c97fa.json and https://artists.proofprofile.net/proofs/artist/23e7e15c-6c01-4edb-8926-ac7b3c8c97fa.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 0x8454628d1d319402c81bc910facfc52d58074623d9234db4d99ddcd28bcecc97. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NLX092100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173a023a238f0b8e144495716833428bfb470e3ab92d01b89ca64c209ed8a644. 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/NLX092100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb133b5d69e85561b71b7b97f2850ee9fa410e4f6ced7ce2b0e23a48febfc408. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLX092100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d65be70827b12cc3abec75c3f43d654803dc5e04695a36558ac2c4972f6139. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLX092100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38290b0baff4b889c3aa57f06bb180776819e04f0c68df305db0d0b37417c42. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:24Z), 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/NLX092100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919c001232cd9111dad3817838cf09a077562029ea90f5bb8b2bf0151a2ab944. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:49:46Z), 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/NLX092100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555f6c4c49cdbd62aecd22676ea6aa4ded9ffd514052a5489ae4dba80bb50e8a. 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/NLX092100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d6e634c80fe7e44bfacc0367ddc3c9c46357acdaf11c6b99f8f795b2e22dac. 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/NLX092100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab853d71a37d7639908021e22f343138ca710753267bf9165b414c5a249c36b. 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/NLX092100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bde1ff2b50c8550a0db8c89d15090d4e996d0597f63d6531799dc49d29144d. 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/NLX092100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888091352b3c7cb8cfff9ee96da8a203899038760afdd33c044623419b5c1774. 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/NLX092100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2d88f944dad794375aab1dcb10d41fa35a3030f6f1a0cefb8a1fda34401cc0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NLA631000610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7348e76f8ced6f3a7dcb578a0597a519c06d188bb6380782b330f269937179. 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/NLA631000613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7677765ee855787aa7599fd5da6d52392873f633ae742209578e3efcfe08dd5f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLA631100631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fff09cf81823a3ea3e6fcdbf1b821ec2cfd84665c82da8555bc1c8b63ec12a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/NLA631400823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56572a380a862753d9af29550127e417c89d872493debf7beac58059ddebb32. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLA631400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0252e32ea6cfd0c5929d804b69a4995a2ce94937182c9fed28d6e5c880d57bb6. 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/NLA631400826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9a83301b6f70c1c448451a357ddb2935f1c08dd430d702da8aca7163da20d9. 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/NLQ271700437.