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 0x50cf4c8b6a79e6d7de8e9348a01b98c4575ad1b0051aa97ea20eff9b646a4995. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/599feed2-881f-4656-b652-0c9479d3d443.json and https://artists.proofprofile.net/proofs/artist/599feed2-881f-4656-b652-0c9479d3d443.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 0xa19b48ef3946fd6c3050d7fea41679b767471497ba15e578d506b769f66e6120. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:31:33Z), 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/QZK6M2098513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06d726b1e0b0f2e27a052b627054a88468a257970fe720191817b042aea0a54. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZK6M2098514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeee3267ef8659f8b4fbeee1c8bae5f98c85fdac038ef3c1e543936a06e57642. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:18Z), 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/QZK6M2098168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4057e07c9d01b625ad072c3fa1624f20544e7ec4c6e5d0b01801450f5bfefee5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6M2098516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c69e1008d60101624639098ce4808d35e19b82329591c76e91c71d039f3aba2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:43Z), 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/QZK6M2098518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a76ff7c44c4a774da216151b3b4bd7ee3fa6a24c14da0948e06725c2f5c55. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6M2098519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ebd485a8ddecb9ec2164e579a40699ef08ee04b062967c0bc4c25110b33341. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTB52460903.