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 0xdd3b302fc8cbcb9ccf0adc26d337e54546fa5c31c3611f81297fb4d132fe2352. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d90a5a7-3dda-4532-aba7-a21959756a30.json and https://artists.proofprofile.net/proofs/artist/8d90a5a7-3dda-4532-aba7-a21959756a30.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 0xd1af5d37c7014332c7b056d4be1c764c41d7c5f891d7c640d5733302262c5fb4. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:32:16Z), 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/AUBEC2342026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605db4d19d4c8a49081296309c84d43dcad0deda335fa595450283550804651a. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/AUBEC2342039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe011e7486041758b9a37b9e582da169f91722f08560e7c9f1efee153c4d3533c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUBEC2342029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936ee8ca941da9f20f9538d591230ca5a7faf7eb5263eb71f61070d97f55d93b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:33:53Z), 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/AUBEC2342034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6819bb3c33088d4e67e9717d248e9e423c36b676fa4718d42822486f72a0af. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUBEC2342025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66221f9c9ec0d6c2c29003539ec4e8b36852204542bb4baf44d28be9869da8f9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:25:00Z), 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/AUBEC2342038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815f3635048208294e43766968f4c06971eabc6ce78149f2821599be86d4c67c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUBEC2342030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b39087a32c431e5276bcf6324a956d98e3577fc7a9e4b0ebc34aa45ddfbfc4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUBEC2342027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47936f535660644fed0a2e2c6ced5942660efa02412dcaa09b580b3ed4ed8f6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:28:16Z), 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/AUBEC2342036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dcea0bbd3807322c1ed96b4f5aac61e7690db097e0517e4d4489ecbf0984999. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AUBEC2342032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6850b748fe4eac06478207b9e5c7d5bc6f89261774d6e15e13df530df1af336b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:19:40Z), 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/AUBEC2342035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b82c8ac00ef32e637f39cd1ba35b110aee7a268530df1d620387931b033db7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUBEC2342028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e33c7fb50d7e7c5c6bea60820a41d1b7220ad8ab4f5b5d759dc48d8a83eb9c4. 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/AUBEC2342031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93c529067ed3bec1bc560ce57bf3ae0af3eb6177b2ac7d71dcb0f2f865c5344. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AUBEC2342037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04027c060fe93fb6cb746eed7a566062bb4c2a3274b0c884668b28cb5390f101. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:23:06Z), 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/AUBEC2342040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7073a1ddff59051d8713224607e06656cf6e645d7e2fe83a03f20c2272f9a19. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AUBEC2342033.