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 0x342c9f5be352f852798f6211e54465b5790ecfc9caf74f83cb70de598f3f5b87. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a2cf500-b11d-4183-9447-80b306071f35.json and https://artists.proofprofile.net/proofs/artist/5a2cf500-b11d-4183-9447-80b306071f35.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 0xf31be651cd5d257600f9b3d95a289855fd6611d99ff8ec403d3466c86ff96334. 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/TCAJJ2548951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f13bf385c3f82516893e3651f45771bb59b0533baf0a5459409dc943bfe583. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZZ7M2415173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fa7874ecf6fe79cd039e6598b681571efa2c6b8d9ecc43f19cd01b0d9bbe11. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:47:52Z), 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/TCAEP2051903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab99205e5609be7d745fbab043b1175f5e0685e12a011a560110c405d6bd9997. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAFZ2114432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768a41b5c86300901d05586a61f236ce63eab783b725e25d6138fc0fb3cd39c5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB82422882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4347dd9737ec9397619742605c51fd8975576cf5556eb99d23a99967a162f9d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAHX2449327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020307e472d3fca582b75f2d8b73e53d96f1e239b23e885d507eccb41e03258. 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/QZTB82469330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4da6c7bb159301411615e83497a6de39c4da650d2d0c5c508f07864a083dfca. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB92477010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24140c4643809fada4b285945876983400c0bff89de4a81e699b1b1ca51c23aa. 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/QZZ7V2497367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881204ead2663bb01e0316baef75f2e14c75dd0615e2d200051620c10454f517. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:19Z), 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/QZFZ22569910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1aa07ca57e04d69a1e5f364d12ac9c1376063999a78ec9c79d2c275dfd5ae4. 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/QZFZ22572940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f1987dbe258d80c767269901cb049ed11db7a8974a3592328c9c2ed8785a98. 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/QZMEQ2549812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80ce649108b4f65baeb3e3f7f821f30525622a1fa3a603fd9bba305b57bd6e2. 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/QZTB62554197.