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 0x705bdd0b340ed12cd6eda7cbc35abdd13c5eb291998f8eab6094c3bf1f8a5747. 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/73126775-fb28-48c5-8485-c9072433181a.json and https://artists.proofprofile.net/proofs/artist/73126775-fb28-48c5-8485-c9072433181a.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 0xe896be21bb3d0d413b3e3c9e09947d536e146e33a63ad45b0640d71547eb6544. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM42K1789938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe0067e702698ff7d500638c86add3ddf062f7bdb767918fb98f7f12076d043. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM42K1729821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb263ba3291b9032c3c193a217e301d4c7404bd9fb0a8ca11cfc02026702da2e2. 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/QZ8LD1768054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf15d19a33e8ec0f1539befc3061ccd31d2a2254c8281ac84249089a2fcff42b. 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/QZ8LD1769691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e51f5c6d637ffd8afe8ec82c2bbdd99837ba93bf4a136b3e6d35ce37c7b887. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZ8LD1769692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a40528787211f8ed59d96e4476a851f9d37aca78d6e95d22edc13a54b9dd8a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ8LD1769694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadab1ebfe3e473b1f9a8b9d9c372b18a97eae0a751bc11beaed3fffef0540c60. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:41Z), 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/QZ8LD1769695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3081323c4b5747d2816bf55b1938d63b96ebfd82e83d7976afbc45c192c9aceb. 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/QZ9JZ1786139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0d30936b5c28aef3a7a3bd89ae9bf6b15599f3198d64cffc33c273f42b8928. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES91973110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ff4044cb908ad0434f33c3e36bda00dcd25a34d681bf4442eed89a9cf5b99f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKPL1961861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4962f403f39bfa2171df4e8ea2c13fd9f2e61063901ac755562eeb40977aa1e1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:05:11Z), 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/QZES92313428.