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 0x61d0e527c7e1ff0d12155ed0704a3366eed468d8e29ae52cabe3af42d12c816b. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/390c7573-2b51-4098-967f-b05e2a106f95.json and https://artists.proofprofile.net/proofs/artist/390c7573-2b51-4098-967f-b05e2a106f95.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 0xe3c2cfae8e2987e8d66db9b5b80f062eea07431ab7dc0c0c161267315aa5226a. 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/QZDA72470284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f69f4ef17dc88eb56b4ebf203d18b441b9ad6f4ec3e1e6b53722e53b6a7bfe4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:00:10Z), 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/QZNWZ2439664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d897b6bc231e589d0da6b47c5f938620f4de986017d7e4fed8d925a04c397e9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHN72492003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a699cab52a1fd1e801984aa64c9af4f093ad07f6e18bdd8a4468b797b0d757. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN72489294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecd62470fc1406aead2a8a7d2eb7002f60fbc73d272eda99e6854320f822f4d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6P2476028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcdb8cfa98c8d8ae8154f1eb9e11d05847895a4542e006ac7b10d0cc29aaf6f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6L2414937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ed7f723e4431a2f3691eb04b96c51bb4981f1a27b839a66a24e81a7abbe250. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:46Z), 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/QZRP52436566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac1b977b78f0f6fd489ad104c05f7cebf1ad3d0e1dfc630fd370546bdd2367b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNWW2441811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44a3bdc1439107aa8ed67b15585260739cd75076122099e88fcec423a5c1507. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7L2496440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7d05fcdc1d8ec3e95d67184f1e543b8e50ded78c0ede7e3d61d0356275bf22. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZZ7V2475032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f0027772651ac13792b6f83dfbbe9252893871624631f62f46c6214894dca2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QT3F32408472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7af4a5aebfd603a27e5b7313f650aab144e240722a4607d35d6686dde135de. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6Q2559621.