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 0xd4d6a7c792672c966a6ebef999f4ab4da7aeaf98e7478e0abff63bd9546b51a2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcd96890-690b-41ad-8c0e-90aae519dbfc.json and https://artists.proofprofile.net/proofs/artist/dcd96890-690b-41ad-8c0e-90aae519dbfc.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 0x7e85565c22efd8a342844874ed7e5224ff5c9039066d779dcb23d22a185080f8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGH1267340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc7de503e02c0aa477d1ffe3c70831cfc5bd28acf5fe98b93ec7768b12bf730. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:32Z), 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/USCGH1267341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928e18182317613c9676b8a1aa4adce078078568905346ec10bd871ebd03c35. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USCGH1267344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe504252e09503e406040dbedd150b8da2857466c53c27482b846ff97157d8107. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM91109841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47f6e54caeb8dad787e831a5162709c32c4bb1796fd2c5a159a0a6d50571368. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USHM91109842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a6fab491e11515b84266556c359d24df2d8d502ac16b2c169d664577566175. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USHM91109843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8e6ee9e2502cf55149c7abf81b02f239bfe99e82b74dd9b792c7173834e697. 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/USHM91109845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7abe8917130a1e2cdf34cf99e81d3a89888cd318327cfdc18d4d6d2018013d. 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/USHM91109848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40c72ece9b7b43a078d2d9f7b6451e7f62a4e0ce774f841f552f29351637dc7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM81314752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a23ac6df4bdf584a2d272298458586a6c62a6a48bc95fc1516a38112a2119a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USHM81314756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9ad7166c18e24ad8835e16780fe37914443fc99afff1e57587a4f19b644141. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:13Z), 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/USHM81314761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0717c6a9a95a566852450c2743364ef2c9b497e5db044e4b2dd98ec14119b8. 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/USHM81314762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e61b3c3f81c02529c54076b0891ab5b35d115aec360b67ad45211fdc7fa4c2. 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/USHM81314764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41a2c22f24a4736eb22474ce54a68a76d4f1a4850605239580c772156654d1d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM91773270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b061f3b7c05959ece2321ba89ff2fbe3c65fc9b02ad1c1d40e21aebd7d8dd3. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:41:19Z), 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/USHM91773272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb78b9a265869ad42e04ff97908fd5d905bac95c9fd1492dbfe74a9983f4c73. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USHM91773273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306ded9e641741d11ea468047a2a871d890dcec7437d93e1719f10f7766a6dd7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM91773274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44ab3f5ee0cf90acda517f3c75f4e3af63a0f7da16c64b630cc393b5282f243. 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/USHM91773275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c45f92d0ee0ea5dca02afa669b8a331351fed972a2838ab5dde9a36030acdb3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:20Z), 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/USHM91773276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1596b17ca150dcd067ac74e5f8419960fdf0d5167e280008867c066e62e0113. 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/USHM91773277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55a1fbd36de32c54133c9176d8b31bf37d3e852a9c9a48c5d37d211cfc14670. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:21Z), 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/USHM91773281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad4e3e1b60c44cbc37a334141b80142fee794d6dcebb5399f0ee020a269f75f. 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/TCAFL2127223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5182c8ca57c12613df8a1723efb44c4666b6f7e6268acb4aa34f5c43acbb02b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:51:08Z), 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/TCAFL2127260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3bb556ad5de6a160d573edb43885ac9384ca1f97be46806b46faac98782ea0. 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/TCAFL2127269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446395af7f3a90e08995c0e33147b4b767ccdad9c671def749276f7e6d98908b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAFL2127336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0968af89075c23980d8dc77ef0d671af6eb6a59a483ad27d9a743787f46dffa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZCHN2400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab137228ac49e609b854b968b040121e4eb7a2faa31c88b1a8b6a2b6cab903b1. 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/QZCHN2400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35da20631572275cfec736bf173278517d00eb9d1a7026a0107897a8f35814b9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZCHN2300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc78dc0d3de9215187fd7aa039e229116bc1c8ae0197c69046536a3ed0c40afe. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZCHN2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7e36a0323696f4ea15cca09ba7da637dd089a253f45557462a608439675438. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZCHN2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597aa7a479ce4a69accfbcd9c71a5b3a31d125411623bfb615ee7dd30e218c4f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZCHN2400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4489177ef040e1a63d4ff486e9e72b0c355714262c53584fb486efad36836e7d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZCHN2400121.