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 0x356dff60e5a761ab0a1994496ea1391f6e4aed14813f8b28a9afbb361e5913b3. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31fdb00b-3753-49cb-b4f0-02d82ba97a1b.json and https://artists.proofprofile.net/proofs/artist/31fdb00b-3753-49cb-b4f0-02d82ba97a1b.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 0x3722e4c2675db9caf09d161ccf2b1a1b6d29d2f69b6ac2cfd43b9bae8828fc5b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:59:13Z), 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/TCJPP2162666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d432054e43e01f82e312057c063cc79a4c336c470cfbed491553d5075ec1c7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPQ2135122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9175dc57fc88f22752a024f3f4f87e3e26293ef62cb86acec9cd582058bc5b06. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCJPE2544705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a756ea4ca7ef1b9e3210c76ffdcb2792e1b78ef011daeb22824f49ef63e125d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPE2544624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92612d99d59bfbc931253d4edadfc77e5945f053ad73292e92c673970180245d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T11:26:20Z), 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/TCJPE2544635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce55867d8d598725f668ee18f31b3cf9ce1a80868962d46daa72ee0fb5c65fa. 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/TCJPE2544637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f03a456654db73d884cd59533d2a5cf6767de4aca61d6a74bc76e7a912bde30. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCJPE2544639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42600a98656844347a353a7dc583df38ca2962bf384168c63d3acd1f5a669edd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPE2544641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9c904dd902c33768017a8419b79b7d442637085f14ad015de2f12a5a37c596. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:41Z), 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/TCJPE2544644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b435969d294c3f28a74c67fee37e7026812a983cb87e872e1a49ec7fba8a419. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:10:30Z), 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/TCJPE2544666.