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 0x1f4b32dfd5e24024282794520c9445fc00be5b84771137fb1bc63d932a7fc914. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8961d5ef-c7cf-4143-b143-7325d5d9bab9.json and https://artists.proofprofile.net/proofs/artist/8961d5ef-c7cf-4143-b143-7325d5d9bab9.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 0x5b243c8fe7f75d2ed4f60466ff7e9d56d592073ec753bff8067c2502c5928ddb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:22Z), 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/QZHNB2545912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173a4e4a880b412855835bf3ca31d328c78411f83ef1dc1e5f2a03ab2682c403. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNB2545913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57c04b73fa9d360ea804edc5f506fbd0bc3d4fea9c4a7c08152dd2aa3d8232. 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/QZHNB2545914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4541df9fe31ad7072e26ae34cb04600b34dfa7accefb42ca9a7e59b6faaf9025. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNB2545915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d004e7ee233462f96fac0ec53b61a866af531abb706033df234343792304d31. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNB2545916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d12afb3c14842d6da999343c969fdca64d0684ac46d77833049ab13cc8abe9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZHNB2545917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab1af4bf45e05018796e95f27a2d31a87a818678f95cdab89539c238a36eb76. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNB2545918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b06191c4d7ce7183c219bb5e027caa47c6d5de44bb1a066ea95ebbcac2cc13b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHNB2545919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c740e154acae846c7c245f61637ef65a0ed1f6843a576a47b82247812ccaac. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZHNB2545920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd3c8ec31a90451baacbd7a42f0d1ad615dfd1f940435b748d135b83b28949c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2545921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6945e39801dbe88e57e05b2df2ef6ec3b11481ca2bd6b4a18a22d0484251d237. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNB2545922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6333d97329d11cb8472ab490737730a4c0717df0ecb3b51ad452ca77da95c3. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHNB2545923.