The Bronx ( ) is the northernmost of the five boroughs of New York City, coextensive with Bronx County, in the U.S. state of New York. The borough shares a land border with Westchester County, New Yor
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 0x8bac2e3d16da57b95c6bfacade2a2cc8bdae4fb083a23af7b9dd43c4b7ac95cd. 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/a7e1d2e2-ecde-437a-94a4-bf27f906da8d.json and https://artists.proofprofile.net/proofs/artist/a7e1d2e2-ecde-437a-94a4-bf27f906da8d.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 0xeeeb402c6469df3fe8f11cbcd06e57eb04cb19b78dcb3e7bbf0e773ba150ac76. 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/TCABJ1283791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391bb5dc2fffc8d818466e0322b9fed82ebceb8c67e7f9a74169a55e0c9b8972. 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/TCABJ1283772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50daf7829f2bc04623aa820c044c013ed360b43e5b513c352b133e8f463f39c1. 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/USUM70601897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb74d288120ff8691cedc1e4dd2232ad165d8829cfd2d2b0444a27a64457e2. 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/TCAEK1922126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0f0dfe8a17478920a213c42e0de763b51fba74160232f2966e8bab0b064cd7. 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/TCAEK1922179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b55cce608d1fcd3f7cc21e1d7a9f2c248a91d97ee8c04b5b0c664b42b851fc5. 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/TCAEK1922227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b9a01492463658bb53d97a38b1bb33a5ebc2b09ed9531936524b8c803df87. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAEK1922373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d04e64cc0baaed9bd9e48190fa3a1f52bcc0c9d5a27a220b983c1704f7c320a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/TCAEK1922436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabef34c0bc0c504f7bb92a8a684584f0a4407a975134871d2a10d742000fe783. 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/TCAEK1922467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b2bff79527436b87d57996d1450ced0c3610c7e38d2215de021170e0983899. 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/TCAEK1922488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a9de191a368b24d9667219217fb90100d87ee7d2579aa5c03c7d976aa1af2d. 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/TCAEK1922533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e83b8442ba2a236cc4b9c7a735d81e1eeea4783e29a6610733843fe5067f322. 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/TCAEK1922550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1068192c9ad135cc42c18a2c8a648e74c5e667bdeb2637082ef77256b3523f. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T20:39:21Z), 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/TCAEK1922563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1bccb5f171a45d24e11474845049f4945260056554b613a8f65d222dcf4892. 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/TCAEK1922586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bea73127fa4310d6516839fa701f63b397e19b5e7ddd9bd8efcbcbd456c172. 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/TCAEK1922605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ba6cbed4bb31addbf353d242aeec1d1a89d63ecf334d1e4ec7bd52340fef3d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAEK1922409.
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