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 0x43b509142dcadb3e5b5cf41def43ec4e81058a21c67deea4b46510d69a522f93. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7fa1d1b-726a-4ae6-a8fd-119d2679a885.json and https://artists.proofprofile.net/proofs/artist/a7fa1d1b-726a-4ae6-a8fd-119d2679a885.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 0xf1c0cfa652603aff59a7e04d145340eb0ffba41f00d3bb9f5585259e5231b667. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:35Z), 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/QMDA71813081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4656ae47335259bf8190be104e20b6d370741b704c103c92a6974f60ab9e258a. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FR10S1967374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134901a140a0911eb0c9f97f274327ff506845e371c9a52be812a754a425f22. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:08:17Z), 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/FR10S1967375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bff0247e2b4779278adbe8c30e371fdcbc561febef92ae987e7685fae899f7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:00:52Z), 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/QMFME2019832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1967f5cc2a56030bd7a1a02339f53505bcbee6c3c76da025fe4092b6470af804. 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/QMFME2020077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cae97a81f34fb0b4f70b246ef00274baea52cce1ea6e0e2e5e43e5daf7dc253. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QMFME2020078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe528d77712af8457d7486e9fbea5a27a4f09ca537ba07a6bc7706a278520943d. 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/QM6MZ2174856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d1e1a77a184710d63d174b7321803f1b6da578f9eb116fe0f8c8db9c8bbfd3. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FRX282306597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb54fa8f0fd0730eb7d7b7ec7582c55f98f6ce511eb0fe41748988ff0580a5eb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:57Z), 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/FRX282306602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc81d4849b3df49a1c69526e687857a77b58ab6ca94777d711796ec4ea99c319. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX282306596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34833763b9d21442cbcd3191614015c569c0a286c983d629fa75c1f9a81f31bd. 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/FRX282306599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8257a80d00cd25b144d0c20d1f412175ab63fc185a8cf012e70bdf076aaa38b8. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FRX282306603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dac0a0397f9bd4df014f8457a2bc5f268d2ade8645c1360b20cefd8c488165. 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/FRX282306604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7ab178cfc718129f11ccf0c08f881ca5ef81c6542f1f76696c0aea900b966b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FRX282306605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92af5e4c8af745c242a36fa792e38558063f0f832f1927566e5becb9c3cbf794. 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/FRX282306606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744c435d7a463780d5020e1b7eb13811f77722d8c5b758b1eb9169dcc0835df5. 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/QM6MZ1867424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a216e86abea5ee01e19e870c01b8216ce1a1b5ed59b0ffa4609c164d75639d. 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/FR2X41785962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2ec28de8fbd96d158a5e79035ba3958d1b506548ab16c0f9263f081bcc527f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR2X41785986.
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