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 0xcca5513f51f70dad93b4e365693e01765ddfdd7b7c44d89122a526e45750e819. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abcccc0d-ebb1-4e00-b20e-6a9b155d41b0.json and https://artists.proofprofile.net/proofs/artist/abcccc0d-ebb1-4e00-b20e-6a9b155d41b0.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 0x067fa222a5ff79db9f0ab7073374fa52a7203d514df1cb3df0710285ddaf3238. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/SEYOK1734267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7994bf00c2493a0494e2cca98ddf3aa6661f919fc3665bf2924d6d86f02c8c20. 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/FI3FC1933102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a1897a47b05497a757ee43e8f2a9408060c1f3804d174f2b4c51e243961124. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:40Z), 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/FI3FC1933103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51c59c243af1e11dffa2e98cc5f6479807a09b45417a1d60aaab7a0c4cab737. 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/FI3FC1933105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50deb7c6acd57e477eb7cfdab43bd829b487b7ee1d381f408ddcb30de13251aa. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/FRX872198128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817b7282f1c79896acb83432cdca171daf93774d9af40530098c98a55ec1c2de. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FRX872198129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02fb5ef94fb06629c635f024e0f2cbd365044307d5166cf0bc6f095b43c9773. 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/FI3FC2138801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64595a9037ee52e82edd6d708359ad5b677dcf0eaebc573dde578f6c1fbb3923. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX872198135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e899aca31cbde38b99ec2df3e0ad04fb8330f6e40d9c863044f25a18afae1a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEKB72421250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a491a30acf71ba2d564b370372516ec175dd1f75f24d65122511ef700873c9. 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/DEKB72421251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023ae9bd17deba894ed786e59ad2cccb6c7f8ae2ab5ac7080acf95c3b39a20d6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEKB72421258.