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 0xcf7254bd849863df00442ce38f71b64cbf544ff562873e9bf3b06fff8255b7bb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd254cf7-d96b-4934-a77c-18fdafe38eb6.json and https://artists.proofprofile.net/proofs/artist/bd254cf7-d96b-4934-a77c-18fdafe38eb6.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 0x39fcb6a0423af80e245d6ed0b3bfe21c9a77afa9ebd5906934b7fe1c539d661d. 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/USL4Q2018470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420ec5769f128074be778d062cb0bd1b4eb58dbcbc8d979d343579a7a85f5c64. 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/USL4Q2018478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47637c3a130dbca7bc7458bef1908dc7273b9b828d4bbcf36502f0753feddfbf. 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/USL4Q2018479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50b1901c2a45e6f511b6384c3a1a46514551900414c6ee8cfab75dc4510f2bd. 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/USL4Q2018463.
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 0x0c42a0494d5eb50d375205763f3f0cdd0c4e2d4106a55cb6420ed235c4a1b07e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USL4Q2018465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9b41e7c18319c2ce769713839076c9dc3992232754613b963df619a68abe68. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USL4Q2018471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35591402b7b33ab129a49b2a281e00840eaf84db26e43175e23d48958b4bbd8. 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/USL4Q2018474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c78149724b1292d6eb38ff2930cb400ed356254d90b45b9992b6698ded37926. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USL4Q2026745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c17b9681c36b2cfda51f88953dafb506d8586d8b9205a2c741049e28084526. 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/USL4Q2060837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c8b46458cd126d545f80857f3f22cb77b20051b8205a866e344d0395a6c5ae. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGJ2104948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42da767e274b93e4e16c7805bb75dab5b9bf550f8fb7e4fb2360c638e5b64cda. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGJ2104949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd9f3e38a5a47924206176d8eaeee65981b10d9a5df9ca0f58659281f2d2a36. 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/USCGJ2104950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1d4b6b4ec801e0b5042f819a30484ff1eff568395c52b58fe5d08641bf6a57. 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/USCGJ2104953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd90741b1699b24cde7a43d129f90cb05087446dbeac7b70021fbef7521addb5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USCGJ2104951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06462670c07795c167511ba2b054ae1b39ff29bf9d8bc38b5eddf3c57704eac8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USCGJ2104952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346cb120ed68871522e9bda9293788a124bb6faca85d924705b447dcd2bd89db. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USCGJ2104954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96932bd816f65e9ffcdeb6b697317097379520c5de2167a2f5cec6cd21e14f35. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:28:14Z), 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/USHM22125928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793209b16c998280965ffcc502b884554e9afbc69c3f08ddc46d34f4fb3423fa. 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/QZNJX2383457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822e12f9659f1ca53af586013ea0f4fc878420e773c9c3ccec325973558e8e6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USHM92036826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253db4a79156085eb7a2417745c43d1db90ea2045afac8da3ff9f4fead1f1fc9. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USHM22125921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1bbe5d2a25237978e114be5b89050d353ee1716dd72ddad6f098845afaaf36. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZNJX2383458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9610a9a107d7293b92536a3409bad45de6423f6fcbc11e3353be7e2733c6850. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZNJX2383460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c049d192f2281150b70f892aba4d51baea2d23f8e07604136016383cf35629. 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/QZNJX2383462.