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 0x17e35bc64fd327f6b59a2a4c759c57e1ef05886e83c8acaa2c8a96da00732a0f. 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/2521f6e6-49d4-4465-8d48-ee0a627db88a.json and https://artists.proofprofile.net/proofs/artist/2521f6e6-49d4-4465-8d48-ee0a627db88a.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 0x60c0a271261496bc7cf3a1ba43842fed2b8febdd581dd756603082531ad198af. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:51:01Z), 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/TCJPP2122644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cf5ab741df1c8688b85d13c0914d3f3f1da3c2a49933ae8d057580f1479be4. 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/TCJPQ2143524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3834038d544c40bfb0be7d36f66b3855e20c7dd550ae4a0b9c36104b598b8f4a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:17Z), 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/TCJPQ2143575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa33c645a51fb0593c60ab57a60f99c6fa7dca907d93cc243c9758c55a168c8. 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/TCJPQ2143585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5310fbb7eb1d475e973a410f3202b7ccb6d9fe6ba9c5a039b575c5782064bea. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCJPQ2143583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee7abcd4102c89c5dd33a77da669c5afc0171a5e6c98eecbc1260f8a6c7907c. 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/TCJPQ2143599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5310fbb7eb1d475e973a410f3202b7ccb6d9fe6ba9c5a039b575c5782064bea. 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/TCJPQ2143583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee7abcd4102c89c5dd33a77da669c5afc0171a5e6c98eecbc1260f8a6c7907c. 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/TCJPQ2143599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bf52ca53688ee2a4dc9fa31c1430f47adf02f9787ec6f97e329b0577e2cd19. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:56:11Z), 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/TCJPS2218118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfb0f0fcb7109bc10f4473f59dbe5b508cd6573c363bba812dfbb9671a9fa2c. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCJPS2221081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc5690bb51c82876cef906e279e45973ab5e4822c18c9ff2680de40d5578e31. 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/TCJPS2221147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2349e55512b1c055ec050577839224a20149e07e2ed3de67d23788e725b2d8f1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPS2221155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f7f829ece50242d352e39e7dd20ebeccd81cd19dadfc61739396e71968d7e7. 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/TCJPS2218114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bf52ca53688ee2a4dc9fa31c1430f47adf02f9787ec6f97e329b0577e2cd19. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPS2218118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50680c2baafaeacf75c72f7d0463f02f70a7f3cc46cfadeed94ca5c211d68c01. 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/TCJPA2431189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1892fe679836ce2f291ce774c70ba8a9ac58714dd1994a11c78e7adb2ecbfeb7. 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/TCJPA2431209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8857c28306a58fc9d7d586a0707991903f3d12024e31c70e53820d7ab30793e6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPA2431168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50680c2baafaeacf75c72f7d0463f02f70a7f3cc46cfadeed94ca5c211d68c01. 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/TCJPA2431189.