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 0xe335956f341a62709ebcaa71a738f27da92d3e1ff3dfc822ae82e7b50ae70559. 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/851da245-10e2-4f13-98b5-328f0357ed42.json and https://artists.proofprofile.net/proofs/artist/851da245-10e2-4f13-98b5-328f0357ed42.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 0x2dd5817a43cd4d5b63dcfa8b41fcd49f85568ec179be35b65bec2b5b4928f670. 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/FXQ802400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157eacf07f194bdeaeb36eace8ee3c739e9dce76a00b4600b9fe091060595032. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FXQ802400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5033eda3748a5be0e2000d1447bf90b90aad3df50d5892ffe2cf73aa33aaaa32. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FXQ802400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb423823f8b9bc2b6283ea7dcab826dcc2601272f0b4da25088692a02aeaece52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FXQ802400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5bad9e13d26d023c5e5849f8fa3ed7098d1fab2441ae68cd42a3df28a55981. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR4KF2100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccaab5d749d72f0dea52f77271d2c69dc3d5e9f48ac79c0b589e153179ba61d. 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/FR4KF2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccaab5d749d72f0dea52f77271d2c69dc3d5e9f48ac79c0b589e153179ba61d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR4KF2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aef9797a7e7e845365490d3df17ff1dac2531d2c362b9cd0bd5b3ed819f1335. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR5R00911218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e97fc0d16a6a0ee79e3f9d58502260220ab50a46e931d2f70b0ff3cefbf244. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR5R00911223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4455b5ff1acd2dbf97acb579b603347c4e1198e63231ab17ba378352a0f2fcfd. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR5R00911228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf463aea7604815ecba013deb9932e6a59788282574001fc00319d18bca189808. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/FR5R00911232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee35a6debbd04c990d91e9e0f816674af11970c9fc91f643823afd47938573. 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/FXQ802300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d30212c3f0c2042c7fd918c1037322a43862d5f7c00c1d51f61be1e940e096. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPGB2219140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300c6ba2b70eab78f8c3d8f1be5e5c534b3c6f1f459fa10a81d4648eea0d00ba. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPGB2219210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dee8a4ff724fd5595de84960fb93dd4636a74fa17a4d203d9526e225808fa3e. 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/FXQ802300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bbbd47e718c548edb0c59994a785c79ac4d679b80157405b7dae5f0029ac65. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR5R02213507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561926d0caba5d1adeb090de16bebab6e125e4133daf703dd9fbfc482e0db701. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR5R00913006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef866b57308e9e48fe7f9200797d46aea12b96ae07d6cc98aba6043e0edcd905. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR5R00912510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418ca3b10539d99c905786ff8b2767f8aa3f550abe0a70e751fa872e6efc73e6. 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/GBCFB2100431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65472b6dea4c1383918376ef157c34507290096720e0d1a422737b538115f20. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR5R02213389.