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 0x54e594f7124d6bfed98fb7860237e5a78703008c9fd58594c528217068b0c676. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/619481da-68f8-4bb0-baf8-42717af21e4d.json and https://artists.proofprofile.net/proofs/artist/619481da-68f8-4bb0-baf8-42717af21e4d.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 0x17888cb7b14f18f846e879c0845a109e0e4fe3ac1ed98e9205c32e7f66dcb7bb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USTCF1200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1761acef0ddacde1f2b212cf30774fc1f2030b38ca2c8fe515d139f3457b3ff2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USTCF1200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c48fc32c6b8b3073b1e053c53be1716b5f05ddc8e24ec8c0f52e73736eb275. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USTCF1200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3589bc206c5ec896b596f7384a7fd1e30d02e34395c87f32a9711aeb92406c7c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USTCF1200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808370b88e3401498166aef0daaaf143a7498648b5cdba4f9b55ce284f0d3030. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:52Z), 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/USTCF1200072.
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 0xa76de95553b17e85658b925568529b46f28ca6759a53d35ac822098da6029c9c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USTCF1200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd012c338ea2051fb69441a1906743940e4405147bf03c1405a11b3c76a130614. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USTCF1200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c13148c11ce333159484e6d02d67be25970dfb40279d9f35f92113f8b233df. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USTCF1200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b7ae29b2a3d2db0db27868c9252118673a2a38f7b717699db76672c2ebc0f4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USTCF1200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc945a4d7c8e280a095477b650948bac58710c6fb87d3d1e08529492ce0377d8. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USTCF1200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862fc659976ba9a540aff5b270c3494c0d7f33518e01e2e5044de7f69792af71. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USTCF1200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195f0fea21e00b60dce087c0e07c59722d0463f965066c30027e176477b3bf7b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDHM0807379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d143dd03180889fc72b2c8a01847c1f6ad8c0ef6cb34dd3b979fae4fd102a92. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USDHM0807377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe5c3cd17d9419c1e0255a7c96d9a9d03d81a98ffeaebf0c14256b4f98b0a05. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USDHM0807384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cb81ef24334b5ba35549d00df85746ee9fb827f4913772fa3a63ecb0c543e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDHM0701111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54764dce45d48e6cb6c46af38296cfb12ac715b5808c3d04714cb4aac84a7ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USDHM0701117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76fb9da01ce23db71ee14da6f91cd1c67a5cf3c418923c0dd9a8eb6855c002b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDHM0701124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014fd1f79e79d509f7f1e838763cb6b12d8077e42bf6ed23090f191340dbe623. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDHM0701101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92178f912e46751a1b21eeca411292a76029c18a31b2b9e88cc715ff7f969320. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDHM0701107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592677a29f118f5e80bdc0b53a89d1bc04c0fdde286d38f1b45e0bf18b95301e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDHM0701104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c6ecf533903c018f10948ef71af8dc870f7d8c9d0f6e06a5eed7ec90639318. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USDHM0701108.