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 0x9b5cd1a94396ff406ac7a68e76b5948f129a5ca9f7e3cad22aa765da5ac55edf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaac1546-1d08-4406-a52c-f96676ce6f5a.json and https://artists.proofprofile.net/proofs/artist/aaac1546-1d08-4406-a52c-f96676ce6f5a.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 0xae276d4ff8a9b4bade8d43fc0f5528eccecf41777db0915e806b1af8e3326508. 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/BXNT62209528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd8a86e7151d66fd7b5056101dc5411413a1b0f56a0ac4a1d9f2d9453bc85ca. 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/BXNT62209369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a833d40794cd99114f2e8b89d449ae2a669e5205b264583d72b0c8001e8a06. 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/BXNT62209135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586d0e92a20490bb939c8b05719796fe46bdad5031deac3da2dc54d91c729102. 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/BXNT62200898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6969891481a9725ece1f91e607c6610d77ac7826e2289a9202b285fba693fe6e. 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/BXNT62204504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c031f003ff373d0dce4a12d55db5e0363e84cffc25c0bbb2b3b37a7db8fa1f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXNT62204105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955b0410c46b1da8b7af46c3d4ae7c3c6b2844af9ff0510cb8b7dae91e4d017a. 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/BXNT62203159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a9d8ee09d3a55827dfa86cbc676e8faad4c68e0c2498b44d7f5b37b45932a1. 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/BXNT62201607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77eb25165fed468c7a2c98f28de23adf9077efc9d703b9474fe44f3192849667. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXNT62201337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d420835aab40ee37bd8442fd8b9420b6667f6b1eaee7845288e5e2bb6c48ea. 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/BXNT62201343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3963e35687a8e8c3f7a0fd3d1388c8d3529c5c93c255ff9d98f68a0c949bf4d7. 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/BXNT62201340.
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 0x54f718b05bd697b823d8e90db19800632053321faf3d37510a75102d3339263f. 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/BXNT62201151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d40b7c389be1c55346d298401fbabd4dfe0b27fe9c1d108cacaf4285d347d5d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BXNT62201163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321b7c2cda142df1e5f22cf2bf887dcff5143c7045445beeb1233ba7479e3e93. 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/BXNT62201093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dd99c10153efd056161e3a63d896b3ae1a187be5c44f0e384da3e2fa6745bb. 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/BXNT62200943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7d9b3a631129d0a2e546251bdf2909992901d507d0a41ffcd5418ae31e291a. 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/BXNT62200897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8aff0b0f116aabfad62e908b5f0ead12266110a338e40c177d0410b738d869. 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/BXNT62200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5b5385b36964e2d282215116ae7f6bc1a70d6614490e3e95a521b8b1f9d16a. 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/BXNT62200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71a04fc58093b103bf95616d142a815c817a50512459719f941babf0a3c0c4e. 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/BXNT62100403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa624ef6762a679bb25dc1a1de1c5c98ef99a20cb28dc951b5015e923275ce2. 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/BXNT62100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371a012514899261174e5a6f6252c5ec1d031877f21bab180401c79bfb4f2ba7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXNT61903185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919a18af0ef55901856056085f629e683abe755be44de830752b722d70535324. 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/BXHL92100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f3b5006a31c33fcab19975afb31bbeadb110217a833312e7b9726976721211. 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/BXNT61903222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad93051103f8dcd2e7601e76c22c9ed2edb12e3e5ec29008361fd89d4e3712e. 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/BXUVV1900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd2ba86f40ce7c7a96d7b2ccc3f6888ccb4c1394e468072069b6d0a6d51bf25. 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/BXHL91900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a626a462abcf0cd946af1fd9a216d346ddac2349a3fcd5301d72bd71303170f. 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/BXHL91900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3247f567a16d8152a44d53581a5da92bd5d9a50b1a04f17c34958733e27e61e. 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/BX5T11800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1ca83e6017c35f74b934b98d3522c665b10830c3bf0cf0acb3fa6da2f800dd. 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/BX5T11800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa804fd54d04c80f0e2b4f639050c06f36c71ed97867e977aa5d7ba265edc1e48. 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/BX5T11800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79b85f34290c335e9978174c60553d0366ca15bcc1c1aeb2b46469794eac099. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BX5T11800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51f0f96ec04cb591628a362216733f4e2c0ca6c13416980787aee1d5aeac2a4. 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/BX5T11800004.