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 0xfbb33915d9a1d090889542f1d672958ba76b71d9137b0ed084f7b91d247eb825. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba402650-2470-4e2a-84a7-8ddc6c528034.json and https://artists.proofprofile.net/proofs/artist/ba402650-2470-4e2a-84a7-8ddc6c528034.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 0x33b9accbf3e02b85277de391a36914ddc3897e7f0140b8259169b57643084f3d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZS672421816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8bc3bae65d14bfba98861bf0726b23655d8616343265e8fd6af5fe62a3e25c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:25:13Z), 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/QZMHM2437465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d3b820d398c0343420da07883909af573ed0c93f9afc23ad38a499780c7299. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZS652412375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc5aa1e99aa82f43f3087e61c23433bce648946e0d15a4f26c3723886e155ab. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:08:21Z), 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/QZS662499173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdfe454f7835fd382ef1ad29a3e0853003f04b6c5aab3ba4dfb26999af07fa5. 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/QZS672478334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889274d96f61164c718224fb87aaad0f2e4c66b9a010ec6dd446b2ccc1587f7a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZS652470625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ca7d9c9900489f4ac0aa4f6d1d84b07af9ac45ccfec8447c11d735279d8c6f. 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/QZMHK2415933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84c3cc1d1cea9dd936c4ffb0df19a579da14132372b2bb4cf9b6e6ecf1ac1bb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZS632446042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f2e09b6f81a4a764e82795fe8355267308c27123cc2fbe68f74d2d403a3303. 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/QZS642400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860c3c64c4e6c0ce0167519a9880ab669cd517039733b0b4790f9e1a96620da6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM42K2456434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba4547b9c858294c169082331b4b07258d8edd8d204b2d8fa42654f36eb6d25. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZMHN2471424.