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 0xd44e5118f60daa3fe74a56e0d01c2e1a2c6b60af93822115a422144262790c24. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e446e03f-f4ae-4217-ab2f-f93861d6d60e.json and https://artists.proofprofile.net/proofs/artist/e446e03f-f4ae-4217-ab2f-f93861d6d60e.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 0x30c0c1cbcf51cfadd69877b6cb06c327bae98980f9dffc45ccde5447ed276a86. 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/USDY41960534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aa7f415c85c11a7d3ce30e234817b5192bc1626b542f430863d5a7edf5282e. 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/USDY41960535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c95ef6c7321bc9e2921172e79f94c4928f760e1da37e8222ccfc8dde7e8556c. 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/USDY41960536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae394643d22c2d33064f9fbf974a14d7889c1ee1d51160dbc73b8b718fb08201. 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/USDY41960540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817d5ea98c1c396e660295544f2d015e5eb6ccb5671eba19ac285075c838a8b1. 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/USDY41960543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1d079e95f7cc0ebe7422bf35585b51ecb2f0adec3daef1a8e8fde84556a387. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USDY41960532.
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 0x479dbde812beb980f5b58921a4a34f1100f45af09e42ad398185dd1304ad0ce3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDY41960533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c807f12bf8e3f0ef2ef061b13ac86596b8a3e6cc0864f4689e72025a02cd8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USDY41960537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3a3c6f15a197b64685f274e0dc1ebf951aa8c2a2f201bd7232a8b6b3ead61. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USDY41960539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0328408e9f51b02bac6fd923ab5455b250b3a383dce1aa910518f3c8ed8fe0. 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/USDY41960542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca63487d57e74bb565e69f75a87533346963ed0d8a7f586e86273fc24c88ad95. 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/USDY41960546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd230c8038206abe3975695880bf9adf01f03d248c3aa3dcbc9b297e0f30ac9. 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/USL4Q2057574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b38725ae0625e3782a40a36bd3006548236e840f3e83d96814107beaf2ce1f. 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/USL4Q2057578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbbf220004f5d9c32f1238c4692dc4314c021832c7b12c472edf47372c3ec8f. 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/USL4Q2068631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cb38467a1da7e5cc994f386fe9619c2fc6bba2bac998ef68aab56081362c28. 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/USL4Q2068636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0055332b211a6f30c55515724fe7e483aff924aae128f1c3236af18f3f8e97b3. 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/USL4Q2068640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0484744b09c6e1a78a234090afccefbd4663f3418023d24787cccce1f545fd. 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/USL4Q2068641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf147ac0f709d7a26b6e230dbc1fdc89fcda1de25eca1b443eae7a5503984c9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USL4Q2068632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236c3bebf91e0d29810328a9ba74309915edd39cff5030f9bbe405f3d3a45fcd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USL4Q2068633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230e2338acfb237fc00112baa07f4ef20ff9e453d83265ef24cccd104468e402. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USL4Q2068634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d712e33bcba40352d156be10c01ca1c36906124dd92e2a49c6bd6b94bd8e692. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USL4Q2068635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0eaff92a109d76a97a64084edac43e65752db066fef623b2e26adb5dd36a4d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USL4Q2068637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d08e32f782976aeb7ef7357355c56a300a835dbd00d4be130c19693bdc0267. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USL4Q2068638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afdaaa3f6239ae9ead232925f4a8cc55524b2a2a764b7e2222bbb0454ca9dbc. 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/AEA0Q2158967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8a346baa3340e27c1eed3c8cf2c04ca5520574e18aee29d45e735295f92f4b. 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/RUA1H2184256.