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 0xfc9d64bf48e0f69c345992bc61994a125f3be4fb391e259153393efcebafae72. 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/7b2c4d61-46d4-4d95-a266-55d086d42fdb.json and https://artists.proofprofile.net/proofs/artist/7b2c4d61-46d4-4d95-a266-55d086d42fdb.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 0x6ae55aa492217416ef4e32f7310ec187e6abb59f253e6d4e6f0c29f55e642d8e. 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/QZNWR2410441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ad8d66c6613b06224ed4cc9e819611b0b412ce0c304ea9ae46efccfc58709f. 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/QZNWR2410442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba6bd39d151101c496e0b2a6d337c474695d6166716273d842c7cc75ce85d9c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNB2400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587af15f3abdb43d26ad5ccc73a9be9162d3e64350d59f1022c76de7b6e5703b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES62491306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a60a1c7b76f37b822dd4dcccc74ccb1040bfb30c29d85de8a02606160b5ba22. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNB2400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e2cde11647d9a52c2fd8cecd4dcd5fad9eebc5de731498d3f5df535722f443. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHNB2400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d43edddb7e45599b1928313ebf8be5fa2cbaa9d4c568ee19649040c250ce77c. 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/QZHN62402762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1bf463318ddb787b5fb5c6de5cd7aec4396e6246762081b2215199e74ab5c3. 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/QZDA82446585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5804baa9a8970b0bf1ff973cbf408dafaa8ef7dca50025ee133704fa2118c3. 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/QZFZ72459301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fe3490a1301189c941cb9176bfb39779f57e8eb1e2b8e336128e02c82ece28. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ62439847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93808a946934ab50aae2d55e06d79914067ef920a64a116018b21956b566cf95. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ22423003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f4a6c1653ad5e53d4b13ccda678acf9f4371c4e9937df5aa67f64a158f7a9f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYZ2420228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717eb8365eacfcc5dc6d8ec6ecb7340105d50b69ce81109f146372fab5051dbf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFQ2324491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ff96f5920f938d35230f649def76903c2acab3b8f871977e3a6005a3870dc1. 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/QZWFN2309248.