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 0x3df329edd0b1075b2ccffcf92d1ad7d743a68b4831fc6e4f0653dbde3a75ed33. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03e7e637-d90a-47b6-8b2f-3532b383e158.json and https://artists.proofprofile.net/proofs/artist/03e7e637-d90a-47b6-8b2f-3532b383e158.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 0x849ba738e8a3dff2ab8bc7522e2f15248f7e27a6ed2ee3c18702e4fda3ceec1e. 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/CAB580303001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad1330757b6706699604ea82a3b4abda0681fe0ffb3c243c86de42d88b57bed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAB580303004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91804ee09acfd8f77f2192969d4e76151f7e153af3b9223184fdb6fbb2874ce. 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/CAB580303012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884154be90c83ed87473c629110606fa532686492ccb4f1aa78ce44213069932. 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/CAB580303013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb38e6271d3c4e372377e675106ceb050a2605c2cdc1eac73f6b633a0b4b1f31. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAB580303016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffdaf063063abdc10be95f14929cd1d5221abad59504d62dc690334ead7fba61. 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/CAB580303002.
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 0xdeabb77869f9749f16d6f49741124f3c3f7ab1527cb9e91dfa27474124c62b83. 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/CAB580303003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176daa188d56a0eb2ecb703e79fe8092410d32598af52a5f458e1aced26ce3c6. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CAB580303006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfe68a63157816d4afec73a5d023c5f10173daee2200bb1664634bae59cd3e6. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/CAB580303007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd641dab212e1163ff3a3a5d9e8d28b7e3103ce700e720213951529c27bd14. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CAB580303010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc32fcd7a6fa043ab09bb927cc58d68ebe06d43d9ac4c9c3e25d7fd64578f0bf. 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/CAB580303018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cbe7c41391010cbe184e96a0473873c467c46fc8ad77505205be4bcae3b6a6. 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/CADC40902882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c42baf80be370740be4dcc72fa20af306af2c498f577247daf0c8287f349a10. 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/CADC40902883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d529f12fb78f71b76ffe2479c7842afc3508a0e36fbe3311a7047e97e4543a. 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/CADC40902885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d1a372221ea9a0bafa01f4dd77f98fbb5b72a0c3ab10b1ecad2b4dcc477a7. 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/CADC40902887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa2140d6220b411d1de94b2709da401109e4bbe36c1fe59c1f7f75b8b72d64e. 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/CADC40902891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84184d4505022f9b39ef92c815005d656be9491f3bd02958631322c779737c2f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CADC40902895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a984f5ec2e9672ac775a3a7c34b88a4556851a4855568eb968237b9b05f5e07. 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/CADC40902896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd65f5fb354eaf79dfc873e2be62755c10e4da6495e4fb8bb40b989815f09d39. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CADC40902886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a009d242e31f01b5c919869e296f7ca4eb322361dfa9d30c8960bc923fab29. 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/CADC40902893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12df15e4f15a93187d36e1f6292bcd6f8f4992169ff69027afa278df228ca197. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/CADC40902897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6494fa1e394f1b726f3cc95827e047d10b3bed89a9ea1668614b7ae8efc99f74. 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/QZFYW1980955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698fbdc062583d59ae9d867b34c8c3c30868e8d0f39d974594b57d0b92bccd47. 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/USL4R1916233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49872eccd46aa7c7f7238f5a358411b6845e57a1d45df3ddb4e3725a6f4734d5. 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/CAT560500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9950101cddc18a0cd87e87c6e5d41d8fa21ea8522aa2ac7930ec276fbfa97ec. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CAB582400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9950101cddc18a0cd87e87c6e5d41d8fa21ea8522aa2ac7930ec276fbfa97ec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAB582400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdba850903798c50e56d86a0c82dac0ba8fddb479cb069c3d1400067354ec9d1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CA6E61100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7b0b629659010627c6c908879bb384d7c5f72b2442ee55712a7bb96796502d. 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/CAB580666608.