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 0xc88eed230ff407123547f2f3b4dd79ac5eb3a4ef775248a808e85f7034d90eaa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79c29069-20a4-42c0-ba43-e001e5b0fc6e.json and https://artists.proofprofile.net/proofs/artist/79c29069-20a4-42c0-ba43-e001e5b0fc6e.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 0xf4fee0016f09ed90d454f721002104a03f047ef156df19e4bdcde4f40c2652fc. 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/QZTAZ2354832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4d66089ba0a9e80e871c784ed15cf39972177f01d5697c33c42c908fe98091. 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/QZTAZ2354834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9b3ae7926f82196505b8ad4de39a8457b9e8c14245d9d4bac78bf1992f0860. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAZ2354836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b680afea0eb9fe313b6e00cb1017dfbca013978cac33fe8e2fac928d7f521f. 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/QZTAZ2354837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae176d371db0a842a7281cf30a613b5dfa587d20efb7099bf9b92474b0c902b. 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/QZTAZ2354841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5921461436203c5c6311c8825a44f16dffc8c26a38ac8bff9953ab4ade4fd17. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/QZTAZ2354842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b746edf3886aa7b337f5e9073e1348217243d08fbeb5f3289f561ad898895dd. 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/QZTAZ2354845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcf78dcfe01a67a9e49268de0936c4d44146a5f7179ae37b4f79af7bf1bf0c7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAZ2354854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791d0349f78a48b0836f41e4232517bcb23942561144c566d407521cd7786001. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAZ2354855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8160369a25167b670668d6328a1af05ced07c987e551599e0dc9e737b298390e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZTAZ2354833.
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 0x0aafc59c4d6c02ba5f94a395ddf645cf7c8c4abc94457012764e188a6c89d09f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZTAZ2354835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2560a59f72ab63665b299b7ad4933d455ff4407dde4da83d63e36a37a42eb20. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTAZ2354838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0873731ed3126ac0eb6bf6cbedc6afd9052de2116670fa164351544b60705c4. 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/QZTAZ2354839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9145bebdeda78c7ff71d7c1c79714a561938c9363b2b494e8e03e6a1c401ff5b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZTAZ2354843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae1b1564377ba7f28fa56209456a30b8eeb50ee351e3e7a56cec4c083f57610. 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/QZTAZ2354844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a36dee88b955ff136b5546094f760af0d37b7324bcdd0f13e6813e55f203fc9. 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/QZTAZ2354846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e6166e95dc8bca20369a5e423c9eb4f64915b6903b22e1883f478d15da5e08. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTAZ2354847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc53bdc26b2a6c3954806b91fd97900e415c361a70ff64ff6c36de8f4627a260. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZTAZ2354848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefae81be104a4b8982368ffc7d62b3ab950aa153c7aa2dc51f38ab8afe1edc65. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZTAZ2354849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2752eaed0bb61bdfddafdf49e807a6598ad413568e9c12c36066a8d68acd02. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZTAZ2354850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6b5489a0735bb0ba64abd742f13f60e24f51b372cd70e01ff07849f8bd0dab. 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/QZTAZ2354851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fe8aec5de6470f9ea2cb5e6f3174770338939d3fb322be3dcdfdec2da9d50d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTAZ2354852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90acf11b3858dc26b3f73a351bf1a0b3873cde4027175065bd67204516ae569e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZTAZ2354853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2114bc7e1f20d44d0ba44a0db0ddfbb63f70bc3ef92398ecabe7be89cfdb0ce5. 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/QZHN82271147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f3b31ec2be9183db4c7dd40802c3680649fb7c32a238dfd190b3602029f7f. 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/ZAJBA2407017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3ca4e85202a6d364c47603ed7c38846107982709f1f16e1190f7ba52dc679c. 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/ZAJBA2407018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b350bbddcce853eae693782d0ed99d1a355eaae965803f9d5f5796c6daf78f. 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/ZAJBA2407019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e894d8d0277489f6cf796d114f42410abaaa29ba6125687e595074321c5e4bc. 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/ZAJBA2407020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b542b1dd94800bbac2627ad35776192839c16cc612170c4ff30b924e7e3b030. 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/ZAJBA2407021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed622b41fb5be277d8d15b6af756165c85528437efdda9aa4d0c578c9ef19d9b. 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/ZAJBA2407023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd27934658bd0f31078080f32fee95df29546fe01dffeb82de3071b35b5274b5. 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/DEY472470454.