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 0xa53fe3a5591a226c404b0a219e88e1beaa287709044c6b51bb1acd2706551e09. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1427d12b-2c84-4428-91be-df489bb1dd62.json and https://artists.proofprofile.net/proofs/artist/1427d12b-2c84-4428-91be-df489bb1dd62.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sigh of Winter in the Stillness of Night
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 0xf2d47e3c3a78c9ceb2b602fd14be56414a324090d460f03fe69ce4e91da6a780. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFYX1961349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a75b55250b535bd26966ab37a5ff70cfe5177f4fe1b9d2b01b59d67cfbc5058. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFYX1961350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bab2c7da861c7a6bcc0ca9028a093dab13a282a971bafeb01658c99d65317cf. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZHNC1987712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210eaa340ab08613caa6ece7e4df24b026816c1d79fc740c1ee8a8b85d6dfe12. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZNWW2017326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc67f2bf3e454941d0e434f06a04e8c6376e2faa7a85c38487384d557af53e31. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZFZ52152348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63282c3c08e733cc073b7e43482673ed66a98d486dffe30e756022ed6032df97. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZK6G2249537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb6a256f58d69e807d3f20695db66ba4b08c455e614c501f39892cb63038330. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES92470253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eb60d45020eb9e2d99883a0fa24a9f80fe6ba795f27eb6e021ef3386324e9f. 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/QZES92470254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ad38a20979e8dce53a314e341c20c38500ae8061ff9b058374dba64d4f9cb6. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/QZES92470255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924ac5b9a4484de0ef8831e0a8209aea0f2133a9ca9cb9b4787708ec081cc227. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZES92470258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aefb47ae3f4d7ac530c6c31eb0ad62365d3b1dd2493689e9f51b12671f6ea77. 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/QZES92457719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4f616af82c15eaeaa8de591e6dbf2bd083f80ee8e4adf9689610efdc73da6e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZES92457720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6213ff4c48a99174ced3e42719f729d5080431a7af0bdb66b4471129e53cf041. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZES92457721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2027da840a19824e169b8f74aaccfc7d7978b721d98ca5ae23361fc2dd99c0e8. 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/QZES92457722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a3dd52142e78202523e6f6a561e01aff9ba322d7cfca9a5f6db7ff1da972da. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZES92457723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecbe47a0b190eb0520102c368e7dc75c9ad942fc5849a85b346614e73b6c679. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBB2523830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2952cfd57a8143b982956993e121af792d5e020c980a0b21980749b1d015298. 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/QZTBB2523831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe619ea2d4c41a11be1927b8c0d1e53d1747c7f68c2151bc5c054756a792ae9d9. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZTBB2523832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d80faf048f9748bf3f4dff16b2b646fec3397a92367b9857ade801489965238. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTBB2523833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3ace9c3ef629407d6181d5b7efc63348ae7b097eb8ee6415f79f1dfe0b0107. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZTBB2523834.