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 0x6ac52fc3559ec8e339e4f79e2827d590716a437f364ff5cc7c50c3f9adb1f10a. 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/51267f5b-9d26-4797-8d30-a273acb65718.json and https://artists.proofprofile.net/proofs/artist/51267f5b-9d26-4797-8d30-a273acb65718.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 0xaa0f56b518cba8849653a676eb08c7383707cea17b1db5de64ad34740f90a53e. 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/CA5KR1948334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ac454289be037f499dc32bdc1a06671b6e94d3e12eadccd54b7c336c35ac69. 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/CA5KR2040307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0996fd324264851b0794420598a2b59c17ee59e8112c2f7889e68fb806468a. 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/CA5KR2040318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e89c6677a302e6bd8f0fc051870600127dad7b08a55e37d87c2c840b8a4d0d. 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/CA5KR2161078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0c1c2a0a08740a45ae7ac7ea9aba16df010368c0ee1afeced8991dd82aa9fe. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR2161981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacc9f2676b1c8ae9949549edf9b25f2fc253a1e4f7044e3153d238b50f5d262. 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/CA5KR2222267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca2d51277b5596dc37102ad2653b0ad704bbeae21125a69ebddde5abd9f8750. 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/CA5KR2222269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd69f5040306cdefd83d38cedd085ca3b010a6caf7b8928cda76a193d373733. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:27Z), 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/CA5KR2316385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6211e17f19b7fa0298e0a5a860df4059f9f9d41fdda14a3e17242c14eab2177. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:50:39Z), 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/CA5KR2316387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16370d9114f716ab9c47a5e323c7444952a2acc76a133cc9ebec6e40d0d22996. 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/CA5KR2323924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddef42abba32ded73c12b8f10fef0a5dca96dec0eb99e27b2102498fd0e41a83. 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/CA5KR2323923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e732f7a0fa0066c0256b3d4f26700e9a91e8695fd81e5f0b0e4e3ce12863f4. 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/CA5KR2323916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccf369534c88b8a449c28d7dfe704329e405e806c4ec14fa59bc3084d34a749. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CA5KR2080667.