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 0x6e6ce65ce664d27d6ae6dc0a5aedab3db2145d849534805f1ae0fda397a56718. 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/c436dbd2-64dc-4f5c-9ec1-967ea040d98e.json and https://artists.proofprofile.net/proofs/artist/c436dbd2-64dc-4f5c-9ec1-967ea040d98e.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 0x1d899369859b8935eb9bf900c7c740e000957fae8b4ace6df45ca41ac74762a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRLZ10300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae973bf0c4891f88f9b832c8caeab7dcdf33d2a82787bedf1ae065b34c25df07. 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/BRLZ10300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa677c0e9adeed3af8b46cdda722c5593b6ec6d0179c7bcda7538ee55d922a9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRLZ10300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33032478c155b9a242c1924c10629a29d8e036f8a76647787fcc3f4083729b91. 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/BRLZ10300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121726b8b77a36aded436ad8d00b920a6244a68f416dfa80a12d439b751cbb72. 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/BRLZ10300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7793a4601f6092c317eb986e1c282dbf3c42ae0619f5fd0de7a26030d5f565a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRLZ10300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18b002a13a6a0506f1bf43dfa011904174303270c01792fa9ae3d506c0ed594. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BRLZ10300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79838fd1cea0cf1441dd7eb862e3d3c5b006c54c50b4a0adbcd46e979d52f1dc. 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/BRLZ10300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69efb535f50401e1e2ead775bd5f0bfac8f4027b11ff5b0e02c5e892766380f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/BRLZ10300004.
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 0x53c9cfa56bb5a7ba754cf144734a675bcf7c393aaab26efe393775831dc3424a. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/BRLZ10300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e76f5ab89ba5666b64ef8fd409a942c74c653a25c70ee6c60d8c0aa3ab9cd66. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRLZ10300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed01f36d3c89db854a86d36956736da7423e1eb0abbd39a555806b2f820b63f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BRLZ10300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e906751a359a67579430c16a8009befad4906770e47c3dfb3d0af39d31bbd35. 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/BRLZ10300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e297c89d0dc2cb75e1a348c3e07fa290bf4e7766de6d16cfaa4f7882673271. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1879706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a803dc10052be6421052458af3e168a0fe6f45968ce294a65b21c052613fdd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1879707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24d4160ebfcba0612e90c4290d5033463298f1d4a0ba09f5dc7da343a0b3ef3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZ5AB1879708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46f0fcb24cb0212437c9fb0b15fadbfda300af625091b0d0a1473a05ab18506. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1879709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e19a9c3e64eba5503335de41ba2e9115c0476cdaa5cbdc4a947d65934617904. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1879712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293bda50ebf91f0e365af19273b8467e265f2d576e7bde6484100ef8bcd3b2f1. 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/QZ5AB1879715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efa5f5419155158956cdba7738fc4111d29cf0026e26d43d8afa823d9efebe0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB1879716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda56d26b0af96af249502cbcf9c28d9f9609156effae31b38410540127b98a4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:10:11Z), 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/QZ5AB1879711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c71f546385ec96dfad1b4ab47d521b197a47e3f4c8df02f3fb26e321257d802. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ5AB1879705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c50809ca3ca79ee606813eed72a53b1313fad78de887d47a75b96742cb50307. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZ5AB1879710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa22f624b502850a6dd450b64fceaa60411813973932db8ecae1192eb13c5c86. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZ5AB1879713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecf3f794253d90fec36170e6265f2c1bb1525c4c84468dae3b4c25134d7cbee. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZ5AB1879714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb484713bc173ea1150f7845045c8cdc126890f83c0687278c0cb720b1857265. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZ5AB1879717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe889e4a482a9a79a4544869e285c412d3dd11f5a4c0e1b4032b9e1ff1fed636e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB1631046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136c4873dac3f8b452aeba6fe4dc3e8cdb915ba94be2f6723563ed2cbe393b67. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5AB1631047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55542f94e23f6d8e4acf28662aeaacfa94ea159830c121475c588cae2b3a0808. 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/QZ5AB1631051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01d7cbd7a04984b6d0d75c1a2862c6e7d8528734b80c72c9a64fe4d0b82d7be. 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/QZ5AB1631055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ba40ca50f59e920e6191dc85f729de64bdb108cdb5051ae084ff2064555e8f. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZ5AB1631048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03ccb643d9dcd962a99523cb4ece43be9acf0bf545fc652b7b972e8f1e404bf. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5AB1631049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cf0fef1749b8aa22047dc6aa57493c567588675e715aeaedc5c85884cdc5aa. 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/QZ5AB1631050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9e121a1f72c7a2f1b6f39c31f8f41653ff1df7734e6eed23c3896ea90a15df. 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/QZ5AB1631052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1917c9f3bed800c475b70d0c6e78cca8a160fd1f34eca10551b0bf1cc856cd24. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZ5AB1631053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5279ffaedf60a98efdcbf8e5c725e3042834cc35c08b8dc6a054a8030805475c. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZ5AB1631054.