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 0xfefee491a7dcc0ce43200e34bced7f19b5a55cb4e6c700315ca99b046a444345. 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/17a45b32-030a-4943-9deb-f3181d5490b5.json and https://artists.proofprofile.net/proofs/artist/17a45b32-030a-4943-9deb-f3181d5490b5.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 0x588cad077acf797b216d4288ba223a38f01793e1b0a554595827ede67b578246. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEH742305646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeada685cea90067bb8180878d0b8b002283db03fd09b8fe7f2c31a70643ac4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742305647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a080cfec4b788f9fe728d818a8886cd907c2d7f8d8cfd0d3bff16518207a7b1. 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/DEH742305649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b94caa4772fd51c2a59edff40fdba0a9b03a2a367d4c6fee1313a418afd0944. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742305650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5747ac0f6cccc50fc895ba0a10442284a0c5950d7a3ffd944bc8597510eb98. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/DEH742305648.
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 0x3f69d3ca17647062d94b7479d83ec073252c61e8d3f8a91e604b8a91d2280640. 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/DEH742175755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed965a474f1e3af87bd87753e68734f35304a5719ae27508850ab32f4ed1c60d. 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/DEH742175757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b5c4d7584c4fcae65d5050cee6649bc1eb47616d931450eae1e835c3cc251c. 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/DEH742175758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865f3ccbdef77d3cd495d0eb1e585c6f36e94de2b9194208be12d8764c0775b4. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:49:40Z), 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/DEH742175756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870dbffc975e31b9f62a854618ca619eb86a442cf2334fc85d068bb45d86e501. 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/DEH742051176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156d54d1ecb45ab3a0405f7860b5611e643c7c96194a65601169ed93fa8d2280. 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/DEH742051177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed957281b47b2e0d02a940e5a3aeaddb9899b4bb30061867db73e3feae3e5a2b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742051179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f1e7aa706679dc08f70c679939357813a9abb5a5b52f9577599cec8e21149b. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEH742051178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46263d47df7a761c01cad936fbfb41fa2d2f25e052a4804b46b1e24af20bf18c. 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/DEH742051167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561854f54b7cf13fc9de2a0def486a2d2ff86c6f1b100b03e9360d16f800f48b. 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/DEH742051168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a877b0c7cdfc5e3d71dafdee876b09deab7eaeb416522805265b8151f08e3b. 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/DEH742051169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7fda67d567a8269d58d44a44c1de435ef43db42ac0574f37c7c9293f7466f4. 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/DEH742051170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af99522f9aca671aa723900d07b1e5699175986889736375817771848e37321. 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/DEH742152391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1510d0bf7119d88315e9d35559ee5173f019b6e23a6e709eefa80e93ec19ad5b. 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/DEH742152392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac56e4b7083bd81105c5257325aa2d09ccfa88c73065f8d75bb5b4cacc347df2. 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/DEH742152393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90118866ce2eaee11ecbb7f3494e57c7d51a64ef5bcafcc14c67f939af03cd6f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:55:22Z), 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/DEH742152390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ef159f4edd0697612868c662a3cf219a3437ec7c8655af857f0d0ff8c1a347. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DEH742152394.