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 0xcc5e31a499b1217dba50dae3b0462dbf1c1340e1e9bba06a30e5cd28056beb52. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36eb8eb8-893e-4653-8e49-6e1dfd9c03d3.json and https://artists.proofprofile.net/proofs/artist/36eb8eb8-893e-4653-8e49-6e1dfd9c03d3.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 0xc090324cc537f0a51cdd8c469ab04e1f2429a5fd2cf045a1a1c87931c3d82e1a. 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/QZPLS2122510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e552d68b95df538ca1a98785fce2b0a5a2ffb72791dffce5b5d02f37e52131. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZPLS2122509.
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 0x524ae00e3ed618fa95cb488a0e8ba4f5037eeeeedc5decd777c53cbb878036df. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZPLS2122511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ecce467843c8e0e3e8e56635e9672db72072bd642a0142b3932994b4be23c6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZPLS2122512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02d3def69dea8707444197ef8185369d9f0902adede7c42a2e2635c87aa72f6. 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/QZZ7S2403058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5b38aa917f12f2362670c92cd996669d453b4bde99f03a16a4e9d928eb733c. 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/QZZ7S2403059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e4a164129ccb0304ddb2f8ef816c0ec6e15386621037303cd8619b07e7321c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZZ7S2403060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468c599b0075cdf49ddc3376dcb9ebb5c7879790e9de645b26c1d64bef7c34c5. 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/QZZ7S2403065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90585503f78d7bc5ad3d1391a54d215ff21cb03e964f61411d4a2192ccd58bea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZZ7S2403069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7a7fe38752108d206a9d583358d5b3499d21bd181b097de53228c55f89e4e3. 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/QZZ7S2403073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ab5865863071a453f3d6d803b07c9b39337121b3ad3a816199c132843d8c96. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZ7S2403057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80210c310e8467f61c0d5a5deabb00adaed038d29168c2ea85f1bf7fdc3ce4e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZZ7S2403061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e865ddaa962bcc5dce86b913e6131865ac8572b05806d02c9efe447c041aba8. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZZ7S2403063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1c408b7b9d205fcdcbc51699b575b81c21716298491f02eff2630510beffa3. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZZ7S2403064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce3fa700b3b2a19e4e81ef241de05191e5cc0aadf72bc8359c5bf1cd2b61302. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZZ7S2403066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcd6361f829eb4dc49edf10bbfeb3e58589bd4e8e816a76a2399346cb293db2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZZ7S2403067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea0004826997100668b17e31761ced6c0fdf8c199ab89e229826945e648f8a8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZZ7S2403070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f1a13224c9630c28b76eafb9572ba6bbf6a104a1ff1bbd0fb2bba97c90089. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZZ7S2403071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c9043b4d3990fb5b7b67cdf7adebe548adf7b2de07814bd4ce2eba8b51e1fc. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZZ7S2403072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f81c858075151aefb98c46d1a18aa8807b7b391c9352f97b374631a6c0114fe. 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/QZES81977365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98b798567c2055681340c80bb81868207368eeb9c72365db44da01fe22d77ac. 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/QZZ7S2479836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9181e01b9c4f6707d5ef7332bca6c464059a2f6c80170a857d13d47f4aab4ae2. 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/QZW9M2447190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f7d508d27cda174932300b945a35bcc2d003e3704dcd3b2ce249969305f662. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ESA012108253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78aa84b49916234fe8318a0d51904373387a713b2e9348f2c7171e804524d1e. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZNJV2255018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf11de332ca51970d4d414a4b8a8ffd7e99b4e768b0ae007ec535bb7457bcb8ea. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMEP2480916.