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 0xfbc7d35a0bd9ea96e5cd3147495f1beb148f1513d56584b372c5b53bfbd7cdb2. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0407e933-b2c5-4c62-87c1-2ec04b1d3567.json and https://artists.proofprofile.net/proofs/artist/0407e933-b2c5-4c62-87c1-2ec04b1d3567.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 0x6f029ced90898f2275e864bc5cad9f2e2b592976215817e6f0aab3bf8bf79861. 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/QZWV32439947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e4887de39a95cd4ec6964d6fa6af6c25f13baa27937bdc82a44f8db7fd2cbd. 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/QZWV32439938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32d3313c7a41b05bec1fe81bf49d4fd9b6e739623970780b45469e58f77b931. 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/QZWV32446961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1545e69581c7147cb6f347515bf0c010512ebe836f8d200b206cb069855695. 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/QZWV32447053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8224d23ba042ec6f9cd1910ad337afadfdf06be67da10b65e4ccf02444def820. 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/QZWV32447056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b980ae6630849327daf1ee5e9d52456b6c1a48c06c793b2de539b9ec5e3d20. 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/QZWV32447063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ec5363026626312b429c490710ce86fa09e352e1e958fa53a2fc3b09d2bce6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWV32447067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7e1da61e006ead7d1e1a597a5019a95b09b93430720d6575d3ff45479cd21a. 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/QZWV32447069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24785e4f8a918c8fd1bf2ef5292cd2149b815d585b4cac58dd8495cf698a8d89. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZWV32437732.
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 0x911bc858894190e35def3d21af1441df4aab055a091df1ca49854c7926910296. 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/USDY42112601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6a1420351b253302a658781e5deddfe151a56c0c631fba6ea0fdd6013c5abc. 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/USCGJ2159087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7646b398562684b32474efd755ddb47cc7d7497cbd6acf8f0d98736f8bfc538b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USCGJ2104502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6036dcbc84cd0aee3265deb8d49fb45086b3f0328a1863251789121b5d4d270d. 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/USDY42112603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2852fe8fa77b6a7a9bb88c6762a5089e00a507eebcda131b08c3b6b3c70fc6. 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/USHM21925839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f646a59629bbc0b1cc1cf7db07b155ff6caab15fc065d9de363ba3f730d5ea8. 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/USHM21925840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d3559ce8d35ec7f3a159be8c73874b4d08f128b61d0206e879d4b41060c216. 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/USHM21925842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba227b0d278853e13d3b2dbf5f87d23d6826ef32f660af4336d0bf2b98affb6f. 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/USHM21925846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1f9a8ecf4f5b4f67fc21115dd4d053f32f9c2b3bd44594fafeab21bb149bb3. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USHM21925837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf4dacb6b1896f0f308c3afa90d47b41f5bc48599cb761bc34d733340dab54c. 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/USHM21925845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3939fd760cc3f63b501b4c3b4859eb2a56ea928defd95ca466e9fb413100dcf. 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/QMAAK1680697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd15d226fae470f23e84895cd9b79cfa251faa8f64c3f38e6f55afbb6ea32bad. 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/QMAAK1680698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe3ce7834edf79d5f3b43d081bb8a07de3dbea4768506e084d148666cf12647. 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/QMAAK1680699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e494492aadbbccb349e6b23759f31ac6c7739ad77a7ebd18af567a45e39108. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMAAK1680696.