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 0x49fd61a0df778ec269b9357ed205dfd8861f33d7e428b5dfa9a4b276ba442c3a. 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/452b3088-6153-4758-8e08-a088316e8ccc.json and https://artists.proofprofile.net/proofs/artist/452b3088-6153-4758-8e08-a088316e8ccc.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 0xdac15f4148430e411d48553c066a34ab36276e02729f096ca1e39e9f1d4b949d. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:43Z), 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/GB8KE2057887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ecde8eb425a1326afa61cdeaa15c5986cb11c997220bd79eb80032b832fdd7. 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/GB8KE2504581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84d110812a02053450ddee892788e02ad6c5558d8c21ce112a4d1ef5f89e789. 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/GB8KE2504582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a136eabbe608d6aa301fa8df67d10eb1fdb82219c9f87f54b805828ecd5c38. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB8KE2209179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5c057398222bc2908a4f2c009dc21ce50d164573d81348436a97299ff4b28f. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:55:18Z), 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/GB8KE2209355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b6c5d37d27556cddd6bee872adca7141e57d9d7a4385a7d424218737c713f7. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZS642217406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a99ef3af9299fbd99ddcc2baeb33c31c55b6c2ad1613bb4403cde081cf375a4. 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/GB8KE2307834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2a346b5b6cadf77b9d18d031ec0c23013e1744eb5541316db12e880e6a0208. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GB8KE2427119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0503511284e81029c38741f2ec97a8838939c5b9e3f9cbdc84a45de7c9decdc5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:42:01Z), 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/GB8KE2310373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a99ef3af9299fbd99ddcc2baeb33c31c55b6c2ad1613bb4403cde081cf375a4. 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/GB8KE2307834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c4172f51f48a838522ee265e8006927b88e191b53cfd95f0c0b6b54490f20. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:34Z), 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/GB8KE2523225.