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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e83449361e128685d0bbf1c6409bd3e0e800750037b076bb08f63e71089fca. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a81a27c-2d37-4ac7-a956-ad874b4e8828.json and https://artists.proofprofile.net/proofs/artist/7a81a27c-2d37-4ac7-a956-ad874b4e8828.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c561ccde004f8802ab47adac4abbdba5bc3027c660b9602c13a02e6f78ebb. 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/DEZN82531467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1aeb16cefb4807c6c0d4daafbafb3ddb99fa8c3fca691d57c6a6b82176398d. 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/DEZN82531387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081eb2a6f930519f570884f13b59cf7fab797476107d2130e0ef5659aaa56882. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEZN82531340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6490a19ea02a4b4f1d2ecba59e81af6779d745bb5fc1081ecc2fe88356263b0b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEZN82531367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9ef6e183949e76334b7e66fb23d20c4a1e9efd536ac76b991b757ced8a4b30. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEZN82531382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be1301bd866c9d4bedd1681195644d38ee4f6ea0fd248d79a9fc9f4ef53f078. 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/DEZN82531341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348ee627135bb111fb745a1390de3041526312f2e7e38640e9cd8965bbf9b31b. 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/DEZN82531412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a697e768a3654c675aec522f5eab6f7029575ca426276e8b684f77d1194647e. 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/DEZN82531465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261787d55750e1c98d66f31c69b173420b17891d4904f3b5d041e228c9cbddf1. 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/DEZN82531427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acb2a11b41aedfd79b2545e311d7d0b2831cb4c2ab3936b5a39d85edb3fd7cc. 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/DEZN82531322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da7ad128bb7b80facdef35ea12410731a680f05580702f7f2cd778d1d9bb274. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/DEZN82531456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f55fb77907bdbe4a3a5d8fbd1e5cb8bd4455896c90c757892c3069248eecb. 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/DEZN82531473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddbed8fed2ec57d909753bb659366fe2edac0ec6548911e9d2bf857d0f0c479. 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/DEZN82531406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b2e8c4de0801be5ba64856d2db1707448629708312a3347022cccb57a55939. 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/DEZN82531379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2c248d76bb21334557b8d07bfc8abbbb326be7d7e5b0c9a6c71b6cad8061f6. 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/DEZN82531432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ab38e296f7a64c0dbb6df1d0e3477f3931f75dc384e08baae9af1d9d4fd302. 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/DEZN82531348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52219ae5a1ff4e31f8783cf7f7fb63c20e7fd20c6fff0c97f8bb9844de2ac2fa. 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/DEZN82531310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476f729f51dc50827146f1297df8da12dd027e480306fb5aa57c8dec5476a38c. 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/DEZN82531318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1704c09648c5c4ad01459cd5a9634db1d9feb02a59d32025e326f830fb30eace. 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/DEZN82531452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5fdc615dee1e40dec219f30864f7e63846b46efd43132e67ed647b32675753. 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/DEZN82531431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d21058f0be6252ed15909f21a2ffd31b4e14548da9c82192b01668ede886dd. 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/DEZN82531460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e71542a85126c21b7934d165c2e8b50a319e795619a4d7c36bebde86c3af069. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEZN82531466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58bd6be88e58cdd7f6a59fffc465b4ef9600c54d6cd8935cfa4815b3bd14c426. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEZN82531454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf76335cb2539624101b10dcd21c8ffcc0ffeebdbed4f1809532b947a8133603. 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/DEZN82531457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d9e4f6e790c463f8e6135d6faffe7688db602d074f5f24d3045557e4a406d5. 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/DEZN82531376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053d4befee5be60e590feda3ac53ed691e960f2a4a96cecfc375134e38564b61. 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/DEZN82531458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1415ca05e03f46a3a67ac7d1f3f6c5ddace98af986f5778fa6503cb471788b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEZN82531437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb352159399cfdf48a2136e0b23b35dea1d55a9f6dd1d069768bd217539cc9a3. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEZN82531440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e094f8ba73a452d6abbafa8a1e790d7672a17756ee36e6efb087235facce7. 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/DEZN82531435.