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 0xa1d1ff3731b12c5014eca3e3b6957d34ed1657b082cd2ddced14f21aca2881dc. 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/3cf76d17-93ff-4858-a2fe-bddcb16f2fa7.json and https://artists.proofprofile.net/proofs/artist/3cf76d17-93ff-4858-a2fe-bddcb16f2fa7.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 0x27a5a4a2740e41a3668989b7188f2bddb6491e0df436b36785d8f06be3f192e9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMHM2338881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6ced67332b1ac6feb5ad38c17b44377880e8ee2a0f25e2d2fcecc38c0b31da. 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/GX8LD2394198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9e8ae14f8dcba2ee25613b6cb8a9ddb36e3c8e2ce95e4174ddfd0f12b7e3de. 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/GX8LE2360623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aa43d1bd2bcb81bdf7a5200013c5aaa09ccf3f63f136b9fb3e37bc64d28918. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2358988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8111e79f09325ca45b27c87fe466b212478539f357ef199012fbcccebf1c05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX4R52345391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8335bb148b852a058fb698f818a1c73b675ca98b64731fe538411310cf576a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX3HH2399637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fbe11e6efca4f7f26259d83999ad0c0ce753848b7b990890ea09f5b2c34d04. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2300902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22add58ffe80ec001679338699665309ac2a384fb18803786c42ea79f3f6003. 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/DGA0H2337351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f8fdcf3583d178e7b1de579ec3477a0eaf59d84a72a1734348c528b684b171. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BE8LH2300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1add272b0a4fa262d4923cfe262ebeefe72fce813ca5709c612cbb9b2a6ceb9a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLT2H2400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9922968bb1469a51a6ce020abd4aaaf565aead454ff959841bd40eaf7498ba2. 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/GX8LD2412887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc371465f1bc78fdcecaec3e0a393b35d73740d25d01975605b6c00d65efc979. 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/DK4YA2400226.