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 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 0xa6899e289c1d9999691e27c95decb7795aec771df88bbdce117f4d0bf5416d88. 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/dd632478-d413-4f2c-9a2f-17934d7d51ac.json and https://artists.proofprofile.net/proofs/artist/dd632478-d413-4f2c-9a2f-17934d7d51ac.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 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 0x32d3d77df4201b5f9827d16014b8b2db9b72a54dce6f7556b3036cd096826598. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/TCADO1862711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc41c15c9aa1cdcb03fe736fb2d5889b4e9bcc29e3d90ab11a4f85978d8179d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12127562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96192030060e8f44720383c6898ef5cf2d3a41c58af6a2614936d931326e9d4b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FR9W12127570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee260e46695e71019981b7bfd38545bcedad3f28477c710740debd750a6d621b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR9W12127571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb852fc7858cc3b1eef68919bd08fc56d37e621f4db7950844c27ec06b214f82a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/FRD6J2100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a51c4fbd1d28d5688f2d20e20600ae0b02308b76a9ae2fd57dbbfa7309b5c6. 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/FR9W12127051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d220d60fede44f4ccf352739c8fa9c56a9211972e0e9a8ed9a395df70c0bdcc. 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/FR6P12101200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc93869c11dffb1149d4c2840864078b9d2d1589afd6b1a85db1987f105acf8a. 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/FR9W12127573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb343df19bda8b0cf77f465d354d1cc8e66b59e9dd4213dc3483a9a885921e84. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FR6P12101790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11a83bcbdba936c1124cae3fb4c7aa7d6205dcc4bad052e79bb59c41cc59546. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/FRIDO2212493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324aa259e40ccc547183988a792723ff3c74c6170c15d4272fd90ad7267e3ca4. 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/FRIDO2212491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146097dfb8debee28e019e58a7437bc9267a9a8d24ad5d62048f7800c2f054fc. 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/FRIDO2212490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028e3f72f17c7c4b40a51770ad56a562bdfc1614d6307da31f1bda1c36aa7579. 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/FRIDO2212489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146097dfb8debee28e019e58a7437bc9267a9a8d24ad5d62048f7800c2f054fc. 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/FRIDO2212490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324aa259e40ccc547183988a792723ff3c74c6170c15d4272fd90ad7267e3ca4. 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/FRIDO2212491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc41c15c9aa1cdcb03fe736fb2d5889b4e9bcc29e3d90ab11a4f85978d8179d6. 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/FR9W12127562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eb555d67712e1e6f335bca96706ec4e84399a65683e150f0d3e3e0102dfc29. 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/QMBZ92467244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eb555d67712e1e6f335bca96706ec4e84399a65683e150f0d3e3e0102dfc29. 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/QMBZ92467244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09b147148ffcfea5446542e998b8d8775da987fd092ddf7bc69f1663154a049. 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/TCAIW2457191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5075cfdd4b3ae3db9ad618653a900eb0fa5f0d0aed210a603e251d2569a67b5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR5R02500459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9001fd9b04024b6e148322f0c63201365b25d48ea05a6b34056dd7ce4386d2. 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/FR5R02500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae274257b4b8d733eebb0c33b38fb0a45d10a1780b494c3ccad22f575ac0a21. 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/FR5R02500458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0473dcee2637ceeac48e96306b98b8732bd413b402a745b9fea0f8b60231f764. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR9W12226225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d458f071867f9bc78cc36d20a609c423913ed8bd0a32eed61da60edd51e0b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRIDO2212487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d220d60fede44f4ccf352739c8fa9c56a9211972e0e9a8ed9a395df70c0bdcc. 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/FR6P12101200.
Princesse (Extrait du projet Bendo X Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb343df19bda8b0cf77f465d354d1cc8e66b59e9dd4213dc3483a9a885921e84. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR6P12101790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce880d2517d18961bffb7b9fe5cc6b9799c4a0f4e1f36123ec923e2fdb08d326. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/FRIDO2212496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997d0f27a1d90a6fc7f0ed6024c079a8ac51c492f95a5815e298ee1b21248228. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FR6P12202100.