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 0x7778db9ea42e3216ceed6ddf339ed412cbac4ea38ba49c79e6d8bc8aef7cc584. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c05edf8-0f99-4b85-8ac7-ee8409b5a86a.json and https://artists.proofprofile.net/proofs/artist/7c05edf8-0f99-4b85-8ac7-ee8409b5a86a.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 0x95d17191ddf2e279ff40317679af8cf8ba78745089bce92f1815ac8b2aa12e75. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:42:39Z), 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/QMANG2225461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32054e547962d3f49db01a863dc480302ad998a2de01805d9932a7a9d90e5a80. 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/QM42K2218409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91733b98b5e567a15b17bc3813d591f227fc40f80a05ed580c68985d854f16d. 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/QZMHL2461845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869180920d5846ed217174c9035d941222052794166114277321ce5523d8ba20. 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/CAQOI2404754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7eb8a73a1331749c45f0ba75945cbdb6470a9fd8ac74bd0e5408f174a603f7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZMHK2485915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd971bcd5f012ccfbaac038aa9014248f34cf92d2ff9d47a0f4784bbb14cd44ca. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:34Z), 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/QZMHN2407053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af84e0a37bc891d4a568730faed48182654550b766736ec1e5531a78f48440d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:36:32Z), 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/QZMHN2493040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5f80c6c9a831ccce8f504c5b1ef3da29494151ce7a03b56b74dce850121ad5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMHP2479806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9294ebdb168e1a9d99e8e7eaf2e61fb93e6007bf7126dc62acd4cc33262db8c6. 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/QZMHK2480274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb7d10096ff512e4cc4ac5ea2a084d8da963581fc6e2685e9c2ac7adf4b98ed. 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/QZS632509816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe77f4100d509f5e90708843a9abfe822f2a4b1001730feb5a6745f60e455f3. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZMHK2454136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7270cb4a27ba743304e711885291e6ca61aae2e62ee5422b76e5a70adb2d1ba. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:35:30Z), 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/QZS632469496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d801a25225fc86719d0e5513f29626f5dec386fbbeba78ee8a0735ae66e826. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZMHP2418973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7390fde69bb381c7c1edc1e3c727b361f85440398bd44d73fc466cdc838f4b40. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:38Z), 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/QZS652488860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fe5b70c064286645f8ec8468253c7352b9d79d842b17f1c0f34ff6e0c6d070. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZS632459718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc89cbff00814755b4f3cc5e8bb799fc4c2ad8baeb9647344c43d72cdd8d8a11. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QM42K2492009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52cb99a690debac5983ea495ecb19cf5b5e2861bb3dc335b9dcf546b51a73c1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:58Z), 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/QZMHK2447494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c790232eddf008d91e2421b19fbe6edb44a8709b760da1fdd9c7ea23c090dcf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS662457365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab9a299d6c1dd569b1285c8b26311fb0c22199a09657f0f3188a5589753cdf1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:49Z), 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/QZS662453080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf4f6d24ab761953d4437b3612fdd25ee46a38d67e5421f0db11553d9bf3ce. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMHL2443619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d20955bff1b040ccfda0707dd9c64434d8661f8f4d1a325badb23e96a4ed0. 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/QZMHK2409305.