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 0xf892c064df8706c2d4896f5eaf7e4b8ba15404c2d7b5f42efe29b886191bee75. 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/21999213-00e1-4038-b768-f5985d9f8dc6.json and https://artists.proofprofile.net/proofs/artist/21999213-00e1-4038-b768-f5985d9f8dc6.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 0xca7fbdc115846c357690cd6c498e459bfd4786db7dcc78433a7dd6d9e1a18626. 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/ESA011891219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5353611f525bd96a2178f6cc1a30ea8d7cb1e2074ac9b8b726e61686e2755a13. 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/ESA011891220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe799f3b04d192bcbaeba6beb5f99a79d11e7ec19b8225818f648fe2d09b16976. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/ESA011891222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d41d6847ce6c400a4c8af576fb6312ac86a7b5622028135fe27dc8ce07438fe. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:06Z), 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/ESA011891223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904012d119101306f36c89115e64c4f1419a93cbef0b1090a73a79867b4090b7. 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/QM4TX2090818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21a27923321309eb74b6b7c394addba2812d1e858e831a2aaf21f29e8d2514d. 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/QMBZ92011524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0a2d79946387cf1e09675d5bf89abf5a49ce3e8aefb2f142055c0bc333db00. 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/QMFME2030429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fb0220a338a74a4d922ee4b1e39882ea46feb3dbcb9d60fb8ee4951bb88876. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6N22025638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421d64081319439fd319afde6f7e0d5df1e076aa007f62a00a88618d49d2ddf1. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QM6MZ2116619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f7069c2b399de4ab8e4cac520f4fac57e0597e6ee4c13a7c32e9acb3db803f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:35:26Z), 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/QM6MZ2203992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed645c3dc14d2986a02094e774f7ec40fa5527c19307c3c84bce096294b937ac. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM6MZ2280221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59114d67a07910d9aecfba89f4d9f383438b205d8a1687286a41d61ecd025fc2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMBZ92273139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d2b8fa9704e3073a43c3ad231494dc4a546f7febf7b171ba9cbe7f1cf697ae. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:00:43Z), 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/QM4TW2331575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383be9275e6eab556d276d55333ba6fe0ec219dad9be2be0b037fc01184776ae. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/ES71G2408024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca0abf9bfe08585c9aa5e371e382f6b16da9721ec0f9c933c7f6169f8d6e51b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/ES71G2408025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f43b2cccc56a5904ba87fef7f1448605668acbf69d806547f1693fef92a927b. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/ES71G2408027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d3e536218b3e0d110c3a275cd4cf644be7de1cc450c213da40c1ba7f2cfbf9. 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/ES71G2408028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058753eea7c356184da1c0b50d809efa9cfcac021d349ad1de33df68de3a75d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES73S2500021.