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 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 0x7778db9ea42e3216ceed6ddf339ed412cbac4ea38ba49c79e6d8bc8aef7cc584. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). 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 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 0x564b2dd0c8633892b862d3d802b373de7f0573afd774505aab5aac2345c561d1. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QMANG2225462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d17191ddf2e279ff40317679af8cf8ba78745089bce92f1815ac8b2aa12e75. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMANG2225461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d7c43631717c3b1aa1e689a4f5d6fd1fd75dcd3b122ba38aa024c1d21dda64. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZS632236709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32054e547962d3f49db01a863dc480302ad998a2de01805d9932a7a9d90e5a80. 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/QM42K2218409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5836d3470c208014a7e21dac3ea1912c826405be911848e32383a6c9c040dbe. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZS672240982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d94955def0fa782f1b47f13d922512c6e371039a03b513bf858283db70e508c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZMHN2295675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91733b98b5e567a15b17bc3813d591f227fc40f80a05ed580c68985d854f16d. 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/QZMHL2461845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db581f0c94655caab65f12029b14f7f3014a88424a753e08ad39d930a1da351. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZS652454679.
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 0x9ea0a98121b6368d4eeabe91e8314f337228119f133c3eff5f5d17e4baf7c4e2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZS652471156.
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 (2026-07-20T02:49:15Z), 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 (2026-07-21T10:57:35Z), 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 958808 (2026-07-20T02:49:15Z), 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 (2026-07-19T21:20:45Z), 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 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/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 (2026-07-19T14:09:34Z), 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/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 0xac6a367226a1e124f375c2a2c2b00216546d15fedb9003e41955bf407751e1bc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZS642464998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f633f750b5765a5fe7bb7bde7edad74674c336c3fe2b19472674b08c450eed. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZMHP2432469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d20955bff1b040ccfda0707dd9c64434d8661f8f4d1a325badb23e96a4ed0. 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/QZMHK2409305.