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 0xa6e02a47fd159bbe1356948fd252da4f6e827a342484a258e2fe02cc9b2ed3f9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf151477-8579-4639-a51f-d6061fa7de91.json and https://artists.proofprofile.net/proofs/artist/cf151477-8579-4639-a51f-d6061fa7de91.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 0x9b905122f29ba5949704be02dba82040f1c310caf60c44ccd7ecbb3da043c79d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZ4JJ1711673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6a6767ffcb39f50913d56bfcc9b65997c53fbcb9497b2903d9d15987bb1159. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZAPG1804975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee288dfb252a82176a4c72cb75632ff0ff176e57ca915657451085a2da173fcd. 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/QZES51906950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d2cda097d26211befc59ed2108515fcce9869124e3e7ad9278c4e402181ad1. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/QZES51906951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7f03f7c90c798fc34300de9365b4b1bb74962a5f54a6c101b33bbf9b02041e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES51906952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f94e8130657a3647d10d7e16576f9b0bd4994c0f5eace42c539562e5ee24816. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZES51906953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b905122f29ba5949704be02dba82040f1c310caf60c44ccd7ecbb3da043c79d. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZ4JJ1711673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd80f9b1488871b2dc14e9a18e5e1fd96dea11c4e4aea9856d1f1a62de290d4f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZES51906954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00955d8d717a41d29c8c7facc05af71b7ee57bd01bcc93f4cde66b8275e19996. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZES51906955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2720bdb4cfd70000cbd40bf4e6806d962ac14b342b85b8e4c44c4d2e044bfd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:35:38Z), 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/QZES51906956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f892c1b9d94baf6fbf42c177684d2386352d60546924c1bd464a8ac16ab9cb4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES51906958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c87813842653fe8beac746968024b43ae018469d5ab7a9d088c780c1d08bf. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZES51906959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd2cf55b71f0673f07d0a7c63351c8af3cfa7ffdbbb9032062379e1a07aba19. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES51906960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce84768936f8bca11e48dca96d9398dd9e49a2fbd0e666f79e3fb90380c36157. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZES51906961.