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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e746e318eb4bc0744f8014e6f8af8c6aac0d0a7776efbac10036d57e8c27b77. 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/55870d6c-2e4b-40bc-b725-110020f76f31.json and https://artists.proofprofile.net/proofs/artist/55870d6c-2e4b-40bc-b725-110020f76f31.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c23d722984df9f243c0c9fb84f43468bb6cb32dd2e76bb849b75a6600bf44. 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/FRPZ92420080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebd2e0c0c24942f531d2df7b93265c01a551c43cd830c8d94595e61fe7d73a2. 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/FRPZ92420090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9808da4bf96b6d490b120a3b6590747245484becc5f18fde4eb738530e3bf8f4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPZ92317190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c979083f9fcb45dd53224affaa929f6e98a96a9b0c8faabf20f6d530d5d03fd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPZ92420120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbe6767b889077a52ac4e2aba56e95385beb5dbdf4fca27c1b4fcfc5806ef82. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPZ92420130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a861599a1e682edb0fc7b2319391a011bb4fdb198ffbbfe29ce1ade81465b3. 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/FRPZ92420150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f4b6827b2e81c9e78ab45a6eb14ae8cf6d85d9db34e0384930a04fea373d14. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRPZ92420160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1484c819809fcbd8d66e782ce2daa8bcf3119576592783ebb8d268b597de0f9. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:35:04Z), 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/FRPZ92420170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50907a953216af6ca77893a5754e43c7d61179c107cf0c1736ace323ffc53d5f. 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/FRPZ92420180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eb308eac7b46cfff87faa96357ea7e405b1f7766fabea49bbe6126d3f206f5. 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/FRPZ92420190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a38e54c1a260c8ac91e642c53f5cf9a5b346b80b0b892c3b59aa2600e356f0. 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/FRPZ92420200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0544a046c4805a2116d46f4ce6c6d1e2f83d55a2840be50163a5d66566ba50c5. 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/FRPZ92420210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f4b6827b2e81c9e78ab45a6eb14ae8cf6d85d9db34e0384930a04fea373d14. 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/FRPZ92420160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c979083f9fcb45dd53224affaa929f6e98a96a9b0c8faabf20f6d530d5d03fd. 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/FRPZ92420120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eb308eac7b46cfff87faa96357ea7e405b1f7766fabea49bbe6126d3f206f5. 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/FRPZ92420190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32598c99c7ae30fb4eb242412e276c4846a024620466976feeb5f0363393a42a. 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/FR50K2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032877b8470eea2c67258012f9b931277ef273c14b51707fae0224e620e65baf. 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/FRPZ92324400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9808da4bf96b6d490b120a3b6590747245484becc5f18fde4eb738530e3bf8f4. 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/FRPZ92317190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b9ddcb33c6302a779b3164ea59ead6dc674da586c19671a9670da62593e106. 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/FRPZ92304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936bd32a9e9800aa5d4cce509539dab976d97a320a38dd66bcce4ac2efd149c1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRPZ92228710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e9909b424655593608ff6518003b02340cba8ece1be453f641f15b4fbe09b2. 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/FRPZ92222060.