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 0x066202baef44363516113c5416aed5ddb2c42d2df1ddcfd1498c73937ca5f55a. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee05a21b-2eb1-43dd-ae82-f259a086f485.json and https://artists.proofprofile.net/proofs/artist/ee05a21b-2eb1-43dd-ae82-f259a086f485.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 0x8bbaba900c1df5faaf94f57ecd3b83b7bff2dee678b051274b50332e65a342de. 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/QZTPX2493959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605989197b5e8c18411b6d4a0864f5bb5cc16b109552cbab66d4f0b9de8770b6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTPX2493960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37a891df8c6e1bd5263cef26b3898381314ae734a1650e7f645c97f7170cc3d. 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/QZTPX2493964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124bb43d2090a2f54f93b537671decc67be4045f52206a4b512f1e7bd620a368. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTPX2493969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6544208a218b5e43f31dc6292d524904270ab9733eb999a7e468a5d7448db7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTPX2493958.
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 0x2947d3afd3487168ad78debd4c1a1ea33828ff6e2d77d7291344fd97df134193. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTPX2493961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5a09acf65f3a6429846d5ccb7655e22de89a8292b73e3ecc71fdea880e5c7e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZTPX2493962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e9a77dbc974966a641c483e7a4970f0d38d45d9ed9dafe1cdd989b6ec1a325. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZTPX2493963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f309a9b6c477455997283fc69056e5f862d5b8bc0bbb5929bc2d27f24a27e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZTPX2493965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e8a34b17ed55ba290965e71142c39f289dbdb26e1ca2875dc568bca1479d8c. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZTPX2493966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf960071ca1e7a37fb88bc600f408338942bf0a87f6825cd024b560058a0be1a6. 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/QZTPX2493967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03b7c4616e153f899892494ae6b66835f2e9cd74ae247d010457774ad873458. 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/QZTPX2493968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4f53a973809239d4572498bea8ebb89220e2be49ef40cd9fcc704889735d5. 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/QZTPX2493970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565efa8d0cbcb9b777634d73404c3a02fb57609a3075a2a8db367875517dec0e. 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/QM7282411633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4c28dcc1336573548e812f905cb430f7a25ee8a518ca78f372de148a4da240. 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/QM7282411637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd21f5bfd83aa7cab80fd2ea2cae853ad8307b9a9390d66ece6a0e196f2fa23. 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/QM7282411647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c48de7daf9f78a50695c8d0f20ef1f09ecc80f126e97a5a62413192fac349f. 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/QM7282411640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07e180a4a75a71ac7c34acb59b310c81b715e779cdd89f71807356f2de74830. 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/QZNJZ2481869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2769997f989e5243e90de3f5b16080ed8f888af4da3677bf530d0bd78f6a0c8b. 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/QZNJZ2481868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c577da273daf3afae845d2bac83564f0c9486b3f8cdc888486f5a833074fff. 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/QZNJZ2481873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82cca90649d2d0e47b52e1568943cbafb2b5d40328435b4c53173cf7f07abd0. 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/QZNJZ2481876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bb16327f0cc603f75846d21e67a1a906abd5297bdb42d952a8e7185bdf6fbe. 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/QZGLM2358555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9275e5cc03cb1bfcd641ef2b96a4a6d4db2a01a229258b79c42c1395c1a69. 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/QZNJZ2481877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0eb72499c469fbc77e44cd98b5ede529820f16254cdec38be4a4318d602b08. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNJZ2481871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f5587df15ebb22e0fca096bbc66a81ee0389140ebb2ce32c07b5199a12d1d5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNJZ2481875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5122bf924f49cf820d2d427af53b5d40c210faad1e5a2caabb0faa318cef120. 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/QZNJZ2481878.