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 0x7025cd2203732d878dca7e41b0709da35c190aa6fed6971b3af29d3fd152a600. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f83134e-fe20-4b72-942e-e243a2c94914.json and https://artists.proofprofile.net/proofs/artist/3f83134e-fe20-4b72-942e-e243a2c94914.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 0x8b391885d47cc22c2d12d453071c6f5330e7243e84cb9947e386ae2f7f9e478f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ5AB2252011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bf3c10328e0dfa51608e388196a01c858466d1e4be7eb700c55236eb166921. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:27:21Z), 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/FRX452296488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0be746346f71e16b7d251a22b9871b770b11cf36bf6e6a280dd0da67f7c99e. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZW9L2243175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24546d9d616d55f25e9014c97c30f59d5100e6734a5986d25f529ef0b30ce985. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX202334741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb982f816c35c8db2f357a3ced9137bae877951bde20369dcb195d64c22239f72. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:36Z), 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/FRX282359625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a7baf221f08ee4946eac6e4d097fcb37ebcebf1932020a1f49d5eb265e072. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:59Z), 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/DGA052351464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc762e7c87c852459782d2a574e13a84815a06bc0ca0cb4539ae2057009b6298a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DGA072335109.