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 0x06d8bd5fa7d9286d0c9b21c55974b019cd774a3248e993cefa8704a3c73b8183. 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/6ab41b0e-8fb7-42c2-af24-b8f4acfc901e.json and https://artists.proofprofile.net/proofs/artist/6ab41b0e-8fb7-42c2-af24-b8f4acfc901e.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 0x84093bb74dcf86f557e1cc55c46198e72d69a40882426975afdb5f7953b1fced. 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/BEB681500293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06ec6bb9126180038d51806d4a049b9e11c3acf57f6f423fd494a66b1dfc89c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:13Z), 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/BEB681700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf562323dda68e39df32499e2e51b5edef87214f96921a7efc334703ba22995c5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:55:47Z), 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/BEB681700429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86998932bb7af109d7ab930bf0d14a891bb42b4f9960130e16520003d7f877f6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:10Z), 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/BEB682300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c4d1d16028d1b7ec2148cda0989c45abf98f1af98c7dc7534d160f7b3d975b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEB681200322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4899c14feeb5ad80c2a2170327dcb116df1f39e6924969cae5f69d051f2d5474. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLE802020001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1604d8c2833f39e31342dc032832f0c55aff2ee45c1e4e12696b1e60963e92. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BEB681500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2c12ad4f88c73da67220554a0afc3ec63498659b86ba5955e7617d66964744. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEB681500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05061944907d79504dfd0db1830ea52575f1d7cb2d09c6eeb88e24ad73ad9c72. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLE801212002.