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 0xe4d95dcab42354413f6cebaa50c2cd69576997a73a913eeb45ed550e148c7ec1. 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/703edb90-4dab-4251-9072-5b6f0498a125.json and https://artists.proofprofile.net/proofs/artist/703edb90-4dab-4251-9072-5b6f0498a125.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 0x94eb09634180a70b3fc5b27132b0aa55e269766199b496e3f100ea278dfa2b87. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GB8KE2402894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e2638cf907922486399dd897ed59135393652505f567038bdad65d53d98047. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB8KE2402895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6899b3ce9da480c2a3f337ce4a56a27576cd9d68b786abb95f2acf7f2752bf94. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:26:18Z), 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/GB8KE2405265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728bd214ab5a88e73fb85eeb1639e8fb3245a30bb1e974670067495fbc63ad0f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB8KE2424711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2213d98b246d7af4034382cb15dbe60a17fb7000b3baacb3f9ce2c3f8b35048f. 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/GB8KE2424715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b93aa9aab792c5470e83c27d76b4090239a4f1fa17ebbdf8ad386e6f801788. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:45Z), 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/GB8KE2425111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b7efe32d66949bbb837d46629015b5d9ed6706b9cc48d04d979d4132f9bd11. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GB8KE2428926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5990c8b88404b75dec5557d43f34a6715963373f8454cff48dd067aadee9a2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GB8KE2428933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b5cca22621051cc879a106192fec29ddd03b98566038fb8f9494fc71e12f4d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GB8KE2509922.