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 0xe009c1c618aaeeb05a62c26d58418c14f9c381f9ec2d5d6fa2dca69289f6c153. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90b75bd6-b7a4-493d-9797-60e1d71a75a2.json and https://artists.proofprofile.net/proofs/artist/90b75bd6-b7a4-493d-9797-60e1d71a75a2.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 0x3aa29f0379dc5bfe2e90733b01fbfa1b8fee1a8e9b3376bc6a370a1d6d34518c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:25Z), 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/FR59R1714534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4733ec8fa7a2d25993e30f3d09734090d7f111cabb81c7b4f11c41a69308f28. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:06Z), 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/FR59R1714535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5129b6cedd01a01e192021be5d0230b6809f4006b0614da7a65e84c2b560cab. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR59R1714538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fed73f3381a6af016d7aae3f48678106a2e65ec7c69a708072f7046b237f1f7. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FR59R1714663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f3212ec2e8edaae3f12f003830a1dd4f4b78f35697f4c0d0ff0eae7323d283. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/FR59R1714669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7b37e403ec014314b61223b0ba40dced69f9a82207508df8176cd1a2b9c657. 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/FR59R1714451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9254aa3cb7585cc89923836cdf42444590086ad5614d9494905dd3f003bd0b43. 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/FR59R1714452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d50560ce9a1de33bbba44f72632c7e064c170e54cb26b254e62618f2858d9a. 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/FR59R1714459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd679e7ef7a3705149983440d55321d18e1b223bff8f5dc8eaa718354028c4df5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR59R1714465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96ffc38e8706f409ca879f048010312a75d5ae569565c9fb53a1ef75871a52e. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:48Z), 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/FR59R1714467.