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 0x2fbdf077afe388a38e8da9e5897e2f387dde16d83d22063d2566fbb829e751b2. Chain 2 (Bitcoin): anchored in block 953939 (2026-06-16T11:40:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20aeb0fb-5376-40a1-bfd7-488c4236c5f4.json and https://artists.proofprofile.net/proofs/artist/20aeb0fb-5376-40a1-bfd7-488c4236c5f4.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 0x78be43f92f85c79f48c948d211bf52791b537f4f88cb12ae5db03ab37064d83a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CANAU2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bbbcc819e1b91e269f5607bf572a452cf498a9ddacd34ef48a00bdae95d26b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CANAU2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01de1f6a829da6ee079ccfdf427a8bc11f132f8a8d5e217d50175a562956ff9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CANAU2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987d2996d66993ff7d30c1dc2387cf5a6798c8f6f9395fc1593d220c21fc4e34. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:26Z), 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/CANAU2300002.
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 0xaa846a991fa7ca87ed7eb256fd43ae8aef7c1c52a69d594bda9791c8ca4157c6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CANAU2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c5a886b9ec8e366739b8fc98aa60d499613fe150123644a8523df4017d36e5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CANAU2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf39ac2bd6dd0459d5251f89cc0e29df08e1891f64ee5f5074518099d177bfc1. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/CANAU2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff6d47ffc7e6667e6cc7871022f1c13f35d951627757fd46832d41b98eaa6f8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CANAU2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e73d7f9d9fc32236b1ef37bd62059e1e93e9cea46eaef68245da80b187607f. 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/CANAU2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878495098163840f52c7ab3adec60e709f19eb17847193c94ad0f9f2d1fe57a1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CANAU2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a93bee81b79801528daafb1b8a1278563f17574440ea748678c3d5afafcdbb4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CANAU2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19489ae9918cea8bb4fad4743f40b20133bec174ed0894c6f25408c8c7f1faa0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CANAU2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2158287cca5bddaaf7f967ba827814256359ea0e30d95b5c9ac5c9e5c072ad07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CANAU2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea4cbf66bf1672bd326ac6d87f10c0b2981cd778da43edb1f6151becd202e09. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CANAU2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c4bc39a241df151f9eda074b3e5ba94bca0c8b438e8c9d500686a033377b2f. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CANAU2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47b7262a5834ecc5246b8471b0ba7db33defed30c44b6bea06234175075bee1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CANAU2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af1801b95e24899b2ca68056ea1c2eafa11c7063daf1d4221abf7144168644e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CANAU2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34653789781b61a80f837a207b7d674a708f183693721880d0cf667ee833b8dd. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CANAU2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fac384d848ee4848e7db55a99eb2b689faad5d3bbc43f9e72cb1cff5683009. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CANAU2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410dac14ba98d080b3ccbf1ffc9a915eeeeb5f9698d82a62cbaa9a1de85db5af. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CANAU2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd109d81ef7ea058587f900b34da6fc4cee241cf4148140d92573e58414e8d92. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CANAU2300017.