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 0xf9bb4f9264e074831d275b28be13e2e8b063a891df6a045e8f17e27bc8d25dfa. 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/8922e302-4d43-46ec-80e9-ee8148d644c2.json and https://artists.proofprofile.net/proofs/artist/8922e302-4d43-46ec-80e9-ee8148d644c2.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 0x53633c27d96e55c8ef4add3473b11f0cd61ded86a12f6c2ec6f96572d59d949a. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:17:42Z), 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/DEVY81700406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4b3b6607386ee3dd840ff7065a070377555038aca784cf00897b4638209843. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:39:33Z), 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/DEVY81700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5018d9c433a825139a1ba4aedcc6683c8fb19e60268c629073462968f32fa3. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/DEVY81700405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b902ce5be422446ccd142970c6bf8b1085ac7cf9862ff52cce8e64de3401114. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/DEP182019079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63dd2b7f9c81537ae208b03ebd057d7262a5710d5ac35cdea9672e462170d67. 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/DEP182019084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51579a6cfc59eb40b28a0e27d11ea63095519f4d5cd0c6eb75b37434c8741ac. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:37Z), 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/CH7812194059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f75d810cd1c21408db7a4d07bda49e014f71e19c3c2e90d0329c8c61f745bd. 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/CH7812218659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b27e2f09297e7c6996157017048e162ddb6199c998b2de11144ce966384a0c. 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/DEPI82210984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2580cf6875a9033ac7e37cdc2a5c9953bfd94ea343c680921a56667b0205bd15. 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/DEPI82210985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0641cac043366b6821235b90e8e0dfce8f1e2252531cd447ff05001629e2a6f2. 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/DEPI82207979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e038c79c4157a38b2f1e24b5c833fe164caa1a52dd167da7fdcd2a3a7bed5f. 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/DEPI82210986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0322659f8b9e9ee1c463d7809abaf998cc6fc0e95e3ae91d6b250f723cab91. 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/DEPI82210988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30bc28b837ad672d62c4c448c0b78e0a948b9730b1afd0077095d319b39166b. 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/DEPI82210990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba9574e8d77b3bd3801241153c30c37a7f34167b22767c3156f3f70cbd972d2. 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/DEPI82210399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9339d4a8c08764e99e90d760c907642e5081fdd8f0c2cf230cb70fdb7dfd4c68. 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/DEPI82210991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc995a0548d9af143e1147ea33732cbce61ab8b24212c6be9b9203008dde451c. 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/DEPI82210992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b61631a60300fd8d6086753015fde9f7216c8a1c870d8cbf99469a8fcfa29b. 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/DEPI82209464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b4e78889d1be88c7a4705cd71ccf1a9f0ddc534db66f6d9a8d28b256d712f3. 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/DEPI82210995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cec3725c07797cdf5c46d45b78fb4bae6816e67cde7bc77ff4750f4343747e. 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/DEQ121744661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f82ce4be045e1319bff94845263ec57dcdcb4826e6b3fa5d9939fe6a5a7390. 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/CH7812414655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0277855cf4f1f432ce9579941125554f8c338e3fe3e0a9baa2d76c42465eb3c5. 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/CH7812359641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200b09c57b8448a568182680313b076fcf1b5d1c9ce4d067c7bf306fdfd0eb68. 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/CH7812225257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba9574e8d77b3bd3801241153c30c37a7f34167b22767c3156f3f70cbd972d2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEPI82210399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0641cac043366b6821235b90e8e0dfce8f1e2252531cd447ff05001629e2a6f2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEPI82207979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95492da47ae1b746ffdbb5d1a696114e6ffc9ac6165a3ab76ce76c6386ef80e7. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/CH7812198082.
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 0xa05704cd6ae643df90a3ae1ca412e1cceba96783371f2c4dcef54ab5c7eead7b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEPI82016862.