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 0x885e7924993e61af3c81bbd8f05452155dad867074c7a1c6475c95f9f7b622f5. 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/b382da48-f7c1-4a0f-ad54-1947211afcce.json and https://artists.proofprofile.net/proofs/artist/b382da48-f7c1-4a0f-ad54-1947211afcce.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 0xd127cb10cb2e75da8d30a212df14a4921732dee9a74adb39b823f134a61ee0ed. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNWU2135721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75262325f939d957aeea73018f95b4f19688e7bceaf29a85bbf2594cdd4c003. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/FXQ892200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29cf16e3c488b19d52ed37a6c281e340eb8263b934d1f3f663b5c01a1999c46. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/FXQ892200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29127b1ca7adbe95e0ada340634b87b77c0e6026741b18a0c3c0fd3ce86820b7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FXQ892200255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff908ba8f5b19d374412015f1a3dca4ae837e249d741263ea2622bf4be479fd7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FXQ892200524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fd9f91e0ed438eadcb3a461c68b9ab343cfac5fd0a5dc0b10cb2df4c09fa02. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FXQ892200551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd31ad6490051fbda2ccbc0e24906f438b4b5bceccf64ddfc767266696714fb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FXQ892300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f3f97fadde0119e011ef35408c1ffa401b451113cd605c1456753f57bc09dc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FXQ892300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91bf5a71d0a89ab29e0035b67b5aa57748a420429305c0c31c5150a299498e4. 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/FRX282522801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9509021ef225821247ec9b6b1570f92660909426e35c944de5c8b35508cf61de. 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/NL1LE2303433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0388a92f9e008e135f56ddfedf028613292ab972b7a727f4bdff7f2eb215afd. 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/FXQ892200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf040b395c19a197d18b3b9e26e329c847d1a2d57bb913ecef71e8dbe1d8938. 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/FXQ892200287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd4d17b653ac546869cb4ba9f2145e22cd0024778cb28736b45901d4867a1be. 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/FXQ892200286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1440e73b8f3eccbaf220edd1d9ed00b2c8752840a1b8861c57aff0f9f035d167. 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/UKZGC2406307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8318d0b02391c34c69aa082933d4bb7c993c75527777e3f252003a104c1ad780. 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/UKZGC2407072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154a31b335dc745c4801e97ad6c7a6fe69ae6e965205f589d87ee6cd3abc3f24. 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/DEH742430237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01188809ca87c58bf5abdb1af1b4ae76af5a49fec18598a89cc1ebbd95786bc5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2407670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f9442061daae915c7c126fa31ff961a57730d89ee7fe452c2b4f53b23b0012. 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/UKZGC2409910.