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 0x5677114cd8cfa4fbc58f0e276e6d6c02b700ab0d590a49299abe2157b2b1dbc8. 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/a74c2b4b-b2da-4394-96a2-c7da967b5b1d.json and https://artists.proofprofile.net/proofs/artist/a74c2b4b-b2da-4394-96a2-c7da967b5b1d.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 0xd6d473f6b177ba7d1a0af21cd32cedc32ebd018b19914c86b10e27af03dace28. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMPKX1817840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6208118a7af0d95d62f60e8c04bbaa8750988d92dcd9379a8cd47bd37802fc11. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:51:30Z), 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/QMPKX1817851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a9dd5240b90646956110b8a3aea1a465d96b2ebc8315e6874448d872fc5319. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMPKX1816342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2225e7e1ebc2ecb2b5f85d6740b0f711c3f5c7d7a92ef9758f4cda51d321dc12. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMPKX1816350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7360d1e44bdf84c33856b7ff91ef18f2f8f43174befaa863e92c37b3fc1f57cf. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:39:38Z), 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/QZCE61805068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffda42eed3ef5660803162a4aa74de06529f13d8e4750f0d93ee0ee2dcf9c644. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZCE61805072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221d146896bf7145afeff20d10a79335be5029fee5beee712a6bab257229e40d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZCE61805074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f99f4e82783f5d181c62e4a42041c0e7e5ff5a2a68d0f1c44ce1037104b132. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZCE61805075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ee4b462f4660a37f3d82190895c2202b117dfcbd4d6f552aeaf7942afc04fa. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZCE61805971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7d919ca1def7fd6e7ab2157b137cea715b6d1a958b0113e8ce6b2247f9721f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:53:31Z), 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/QZCE61805972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86a06fa660aa8dbdfb63ae92045b295162bf0c94a8165ce997f22f2f7952da0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZCE61805978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb676ff793fac4623faa9cb0dd7fac3ad135319041e960341dfcda24f55c2d2e4. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZCE61805979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df522fbe1e1b132b41464a52f341ee2e1352f3dffd4c8d73314af1a914da870. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA71807872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211f2bbcf7fcee81a5aab156e13b842dbc323f4f2b99ae6b0eda61bbdf31e395. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZDA71807879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9a157873eb3eff50d0da0d384612c098ac1a6898aa5507474a5df4cee12a0c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2421102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3883756bd28828dc10913cce94e278368e9ae3dbeb6419988a906550849f088. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA2P2421104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb2cc3236e850ee14e9c0480ad5a1b3ad05e64f022d42400ab445d7e142dace. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:38:26Z), 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/USA2P2421125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10b2217a5ad39e3e848d6572fae98dcd3ae82c36c960434b1b3aa9ce9f6e5b7. 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/QZBRF1885403.