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 0xd8933474dd92ec2da49944c17775452f2e7a58e4c5c77ac3659ce28ad90a3102. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45a6fd2a-afb9-43bb-aa51-8db1bc0ef9df.json and https://artists.proofprofile.net/proofs/artist/45a6fd2a-afb9-43bb-aa51-8db1bc0ef9df.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 0xe92c24640c100a7b5c393412e57d1b39820161442e210463caca52a1f21d16f9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHZ32004092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4dfb216edda3684853cb147eef17465ee607d9af22fc62ca045b120a615dd2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ32004093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773b0871c26b89dd6dcd1080f2f0a7c96a0259939ce1514dff982668a7312be1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZHZ32004090.
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 0x2109bbe51406e04087c74044f31a14db93ef0e27f37abc84f062e7ff4a2c52f4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHZ32004094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9350fef3d41bcaf22c0437835f940e4c5b5f2652e05f95d9304cb41af2953b7. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZHZ32004095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd3d7ae93b5ecdc78367012546e91ba3545c251c41ce1302c161af478435daf. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZHZ32004096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77007a7f7e59bc1baba22cc90b1b13be793b5ba427792f3e0dcf4f244340efd6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES71G1844977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07f0e32bcce6346dbd7d177a1ba2f2237c91fc9172212968d08ad0e28ea7741. 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/ES71G1844978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684780a17dad2f734493dea0b28ff1f53c404978cc7f79d4bd6e687331262ce1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES71G1844979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1577b6417428608e3e82fc46d7a053532e54a488bccb8801d5a4fb4e4fe5e379. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1844981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b8c742bcfbacf9001e63c1403fbbf698c7ac57393ab32e696bbef4326d1ca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G1844985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a04ec4f5d964a73c713361b4ebca2ceb068ce46a17a67e04d5ad1f899890f. 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/ES71G1844980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229ad07341768c8ed45b1a3ad60e1fc25b7674cb5e26b2cfca861d946b2ced25. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES71G1844982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94e76044c6f754cdcc2ecaabfdac5a227f356de1a84886f68b3f55a165aded3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES71G1844983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe438719ab66c2d3b3d10d84832603daf1d2ccdeca1d72a9cd7f5f77530b623fe. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/ES71G1844984.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c81c8796c763d9b1d87588b99fcbc78af41b9116b6a1da2d1f2a42caa6122bc. 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/FRX201636705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4449af3cde880d634d3649df2a408019a57a0e3793b0131a55670e9c2fecf67. 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/ES71G2320076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b7cf5292ea5f6e15e2eaa39490cc0ee4729cc4c510006fd1d8da91414f691. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2320077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca3349cfcd5289d0c88b453cd5df40a0887d47e8c4205530c278177b18fafaa. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHZ42023383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d216ec51562257011c3c034f0e48568f691fd9568aef0de23792d74a46b6f4. 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/FR10S1619438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0d0cc8b1991c0c099d5d8f537591a254d8d6445b92f942258b4014e602611f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S1619439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6934bd5937b2424e0c551b6202907aa16c5ba202805335aa5bca44a804dc87bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR10S1619441.