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 0x2f9f40f5215b0a0e814dd85365f5af7f09b90a279077045436262e6d4777e98c. 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/e59e5f9c-bf14-4388-a5a1-8d0d1d1ffa9a.json and https://artists.proofprofile.net/proofs/artist/e59e5f9c-bf14-4388-a5a1-8d0d1d1ffa9a.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 0xe03e23e53c845a4a09bbc92624cf15cbb18d086a0b9b13b2b6a993e8dde164d6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCADM1872741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf0d1169693f340fdb1cda9297b320a517938a5d86058663c83275c598888b1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ITB551915530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c713a3de37598617af0df5c5dcc5b1b5cf89b107dbb6eb45ff138867b8bc429. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/ITB551915621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a329561e782a166d734831cd40b3264585d7eeb7605a60739600e9a612c08e9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITB551915634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cd90ffd13c3b8173bfdbd4865393eeba4b41e891f8320b9d1319851fc5b656. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ITB551915635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0655a2aa7c594821d004442cdc5a38c0332ecfcd07881fbe7c66df2844982c5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:19Z), 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/ITB551915636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381ba61b030a6b1c0e23ce503a4534f087e8fc6b16c27f5c41c5b612941175d0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITB551915640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac82adc9164cd9bdcf612ad3f693ed4e61f6df45da5116080aee989436e5fc4f. 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/ITB551915642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8629863aacf18251855438c0ecd1f876c80610dec408c9e55a9bb6232cd4fef. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITB551915643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe849e86ecd9fe1c0c24c6ed000868ea9fa907be933011752f751a9b00bfaf7df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITB551915644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ca68d2e056a7a917f8e1ab31b2c29f615270adf89ca3df6a641d7e7307ada6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ITB552015908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b7482a13fd79f534a09a1542c3047f71c4f434d5a2cfccae42c55f172aac49. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ITB552016032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d64d9ccff02d3435a101c83d30709cc9c65f5eef255b94f2843de579a0e3b95. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITB552016046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfe37eb9bf33608daec27e315d9a8881a09755fd2f09426ce26fb11c19667f2. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/ITB552016049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556a90efc2134f42f630a2a19cddf524a42d3dc6b5dad4c52ccba09db813fde. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ITB552015960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf27e644d43d679239f9dfea20f79e809f5b719a128a4d901c96481829be148. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITB552016051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b4f812a72c2b78ed8863f47bb3a0800e88abc3440cbd45af8d490ab8904fa2. 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/TCAEN1911593.