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 0x72115f1019370c96b39301c9c3554ca97229237a6bd6991792d624d31965172d. 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/543cd2fa-ba05-49a9-b1d3-b24e070a7869.json and https://artists.proofprofile.net/proofs/artist/543cd2fa-ba05-49a9-b1d3-b24e070a7869.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 0xb82dc098744229fd5f114f330f843397d0c0c07fc64b9f3912627709b0c3527a. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR96X1790717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde43c12ed79fb0ad64c9cddd9fc326ef9bad23dfaa2f71b1951b3ee65b8075f. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/FR96X1790720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf706d3ae69fa8e1c267f71f77d996f598e0e52f7f1554749a949b11aa219043a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR96X1790722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2be4903c9d810c6ab012e1d615083466e305e469e4f53eae18ea7ef699174bb. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QM7281800839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0e784bba59f24f0bdb8f7d94494c3376a53c0428acd6be562e28dfed81f0f8. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM7281800841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316674859c79b7ba1d8a043b0729b64d63ae506467b4f861b97f6dea15dcd2ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM7281800842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1a426016b5d73724317c09d669f1b8dda28eb09e4ad2e592b3b15109489cee. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM7281800844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525f7d33abad963f3ecf1d8f1d13cba2b1657cef7d16e43d0bc1f72841f68de3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QM7281800845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904b44f3918496b46d6db5646978822fa6fe74aa674d2c8600cbd7d846d91897. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AEA0Q1848824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef49569cd10a0bcb8a13db35734c459e93b187d83ca3abe6d3f4880bcdc34f62. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QM7281800849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7226125e676a1bc265ba6c0b0adac49c34e78f844a56a0d199a346b970bbcbe2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX201764808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aad26b767e57b700d143015e69749ab6db18ee51027cf331d102933e886f877. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM6MZ1911012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f3699f7c10d9b3514fda8525522a75e2e14cc840bc1ad3d4021a0e1d9793b8. 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/RUUM71901185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d963c377eadacea30fb0ccc74af0169db3f0776fff383fe117f5cdcc21954f2. 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/QM6P42028953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca16975306c0bf30da9884ba4365f2785d5fc0a2d55242c20b08b533e19936aa. 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/QM6MZ2009762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509a58c1846800d0298b86e3d25ded3e5502237a3c904198c710a329823d0cff. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:38:17Z), 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/QMFME2022210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde165f0788854956652ab16c8cb75c9e963b75f9a67801d157ee320b42609263. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/RUA1D2262813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b63fadb4f0735fda4ae4aabc32efb8d9c43cad32bff4f03401b21bc5dc845e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D2262814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9075279baf54fec3bc118e0c245d75f43b88dc2003abfa86ace6dc942090242. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/RUAH62412508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266ae19370dc6b0c46f96c3bf10fb0a2e8eb2aac43eac2bacc1a7e6e41538166. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUAH62412509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94590db4383aca25f84d83766dd0fb096127fcf23cf76509b5ccb13715949202. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:19:42Z), 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/RUAH62412510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22772afc94770b7e5da2372594a36d02dd9185023e842638e4edad6e3d0e9961. 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/RUAH62412511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c8e07a53f61942aa30586b42b5a46977a4ba542b6b2491a30b972bf54acb85. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T21:59:24Z), 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/RUAH62412512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02146e31c3cdc54e081bb509bbed140856b71726a719743d896cd8e53bcf1da8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:23Z), 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/RUAH62412513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4659228f039a8b693034bf1ba1318e4a1e814c06232889011a3cdc8b00daf8dd. 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/FRX202296645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bec15b48397a86379d53a10a208be8998ec5c4cb9742ff5c432d2c0eeef240. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US7VG1633766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fec3d1bb46ca1ef5d464d07809a1e3acf842def03398f369739de36afd57e22. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG1633768.