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 0x4839bdfa4117491b0ff7cf578a449e856f6eec4f794f8daed198f43090a45527. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ec4d84a-ad2a-408f-98ef-7d23cfe1fc39.json and https://artists.proofprofile.net/proofs/artist/1ec4d84a-ad2a-408f-98ef-7d23cfe1fc39.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 0x3f8fd82516d94fe83eae38920e3dad70bbcd1d2400e294cbe8a9721863f03077. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:52:53Z), 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/QZK6P2471786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a7dbb4dab536484b8688744c1b40cdceedb506f83d091f7bcbbe33f2973852. 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/QZK6P2471787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd587764e9c0d6f3ba0db38ed7deb58997cc93fe0780073e6bc5f0e8d4af97b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZK6P2471788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168b5b2278497e385ed7a826a9350a0ec3e7f0aae7e45a65ee2f9fa60d436563. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6P2471790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66dadb2f7bdfc5f4baa5300bd993318d0b9e3e76cf2cc183412b3b6086e8d2c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:06Z), 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/QZK6P2471791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc368b61aac313746a40fb15d472ff2ea1d39437888155633efbb47b34390bd9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6P2471792.