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 0xf3b7cff53fa3c6b0ed9ba8a5092e92381a41086f1d663371fa95bf5c3f1e7bc0. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30b7e1e3-a531-4f58-8f3f-c9cb64a488df.json and https://artists.proofprofile.net/proofs/artist/30b7e1e3-a531-4f58-8f3f-c9cb64a488df.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 0x87cfb3a9e68025dac9ff93d6d1e7f98e11dac76c60a3617aedcbe00f2f44f54f. 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/FR5R02314382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230703a820ce11e8c131ee1f28f4655753791afd2739c1ca5bbffaaf87cbce51. 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/FR5R02314383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31da853f100ddfc5ade33354886fdb1cf032bacb21561a233ca08e2e51627512. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FR5R02314380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e25262e494836bc80fc450844dad0e3e09dbed346d80bbee6f6a69055d647dc. 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/FR5R00912141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4290863be485afd0258ecb00ab7b404b5ea96d6330f778444a75c161eee9aad. 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/FR5R00912143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7e59e06629d89def8c8a921315b05611d1f2a5c35a795acdca4c4990c7162d. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FR5R00912142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd287922e7ad48e1d6a7ed38ac54f039cec99cde55389cbae16dca7927eb89c36. 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/FR5R00912145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaa8baa4d11af3cf5e3f45f649683f3ac0cec1abd18b2e86decf9bcfcb1dc04. 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/QZES62443159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36d3116c2f072232d8b65f31762784ab4d99d0c291658d45175c41c6823a176. 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/FR5R02113244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe154550a8ecd0d7d68d6e0a9b0d1a1615c242dad275518e1465f890defac827. 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/FR5R00911488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2390463ffdf9aaa30ef698828195d2f196401e33e8e594051a9fb4d3ac7453a6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZDA72178163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e4e1331df7fad4514aa3e59fce8facbd571914227886e8d645bfdc39f676f. 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/QZDA72178168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee57bb9e8e4cb8f09d15962f33b4dba4be2545d94b24912f8093609edb50c3a. 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/QZDA72178170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ccc994af0e41c31a6a71313c6c5df9abfc3b6f0bdec88977e9bad1c60ed09a. 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/QZDA72178172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a306a8efed07f5414b49b663573644ed55581b369d4cfea617c7fdb66dc590. 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/QZDA72178173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cb4abc33b604dee69c12a3ce041c24e485f5e07cb33baa82d89eda4470108f. 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/QZDA72178174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455f6d2e5aee1ebcf3dbe067f22e19d08f1809a0902ed51edb0801f8e3ea8a10. 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/QZDA72178166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415bbb04f76a0e6a3ce9552b3e7d5fad412ebc650b6debb4a7c0f7a302f63286. 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/QZTBA2380191.