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 0x07d0df750c8a4614a39e4df2ccc51bc4c2cd5db0738f1a0d940b12fe0760ec10. 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/381fdc06-d674-4c3e-951a-0c72410b6ba7.json and https://artists.proofprofile.net/proofs/artist/381fdc06-d674-4c3e-951a-0c72410b6ba7.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 0xc8310dea78649486a031132f4a74eb77f278947eb374f3d3c5dc7c507ea44a84. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZKDK2146415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eef500518bf64bca0fc9b82b27202417f83992400c4562987410d52e8174c6a. 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/QZMHP2057671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d1779f7a13da0460bb24eaa9e59f37e1510dad31231ac1e48a54ec50ea11dc. 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/QZS672199325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61bb552e7814d83fd9d80c94e44078c2a8e3d2bcd5ddb934f0b7fd579366b87. 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/QZS642178386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3023caa1186d4f6393c2e3f12af7b7343b14f6339281e6a6e840b9291784964. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZKDK2204792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd59b16135defe2a2630a9cb4df85dfaa070d4fd7f7699f26616610d8d0898. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZK6L2249153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdb86207bc1442d8236fe93c71ad8286b93a458a5533f07700c0be4c71e98e0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:31:37Z), 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/QZMEQ2235499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb80203241f47f70ee52741583c06c23aa37291b9f752f6971944bd7f89f9ee7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNWV2462669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf396d7646445fbe77259743c5c10efa00a8cf157b748780292ecbf0ec18548f0. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZZ792473308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b6193f40e325a88ac7e2b516ed6e88a97b17a8f85c1199f7ee517c521c49d1. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:04:23Z), 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/QZK6N2532183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa885ede5e44a12923f835175f480e6a3eac48c697e886edfc298585cdf34d817. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6L2484462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf4ec2830b9e8e74dbc674671f61d34d8e8d8c51238e34ad33382124f4f115f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYZ2427213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcd4530181258630a080138d70893d146bbf5e9a61a75f71b671845d8d2151f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6L2488014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7267e468a7149b26973e3339b39dd6fca30b2d7fa8be944c82c9d2395597c79e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6K2422551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3eef62a1544d4e3f3fd7c632a5073d5a5b36929f6ad5deb7105a3f0443276b6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB32354163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e8fb1f8e0b1b270f7923e512bded3af1686a7d3b27ee5e16a88cf61a6b17cc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB32350932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2b184ca30542ed175a23418064207337c9dbf1773c04efa6bf854bd690c481. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN62598910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4798fe8bc685500281bb6cdcced99cf39e78f2d0d5f95d7c8a30524080fc7b2a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZHN92451666.
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 0x6db255cd7c2f4c40f2d7e3b9c06d8856fbe3be031a816bbc6ca046c2ccd8edc1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTB32347923.