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 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 0x8c6a92e14543df4867886baeed6c916b07bcc8358ea42ddf6f0b8c3163e5b026. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/367a4aef-8837-44e6-babc-d2f95fe4e760.json and https://artists.proofprofile.net/proofs/artist/367a4aef-8837-44e6-babc-d2f95fe4e760.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 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 0x7df96d011a8095ed8d68dde0faf1f67affe856297aa68f701c807ec8979f56e7. 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/USHM92024870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfface8bbad31b2c6b6c90bdc735a05be855453d39e2ebefdb723118d7f8f7499. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USHM92024871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a13f1e381068c90083b0ac72d3e265809b7a3d2f63ef5e5e155a2eebfd4f0c9. 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/USHM92024872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9b5e8d8888e99de408af5f083979e517b88b9e77e6e50912c1cdb4e36c63a5. 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/USHM92024873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3733f2b2d1c8ee9ef641fec6ee0c686e7c8f851cd0d234529ebb92ab2ccfbc44. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM92024874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3106f3d40ba91fdd92c5a7425b0ac67bfc6b3927d5aa3b8fd1e2bfee58daa633. 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/USHM92024876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2c6b88300a4198a60f6834b03b926c034d7675b2c6e919d1c8967d843509a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM92024878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09483b010a44550616ffb3e7725a74f3a39481619d155ec381edfcf33a8204a8. 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/USHM21849221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c33cde746d39525b854ae2eafa9915f4e879635cb58c164468ba7815ced676b. 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/USHM21849222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1d10af2372be7c6abc867da83f02ad5a8958c83924d18465382aa71489e6f5. 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/USHM21849223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7df3418227ab02244b08f4728dd009132aa3ff65f1f85df90341876427d7a6. 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/USHM21849224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec9ff61a9184b129e1282fe9929d0d55ae622c23d3136dd76090f84896b7b64. 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/USHM21849225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3162478cabd07e2b0d3e7347eed21bcb20a79407c899fa27b66f498dd2c8d9f. 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/USHM21849227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3c6ebf55f6febdcfe78c7330030bdcc10156f191b212b63ceb0259bb48182f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM21849228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97a4740585d4f589e679b43c1c13ee4526fe5e5fc2e99cdb1b7ffe9d6ebe803. 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/USHM21849231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671dcf39667d28f71b85caacbe0ad2c35d6d29a85f1f4fecdc6fb5dea1486219. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM21849233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189547fe2b9e2bb4df39c3e8776d0ae59c8db4440a81ff15287d908b3277e486. 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/USCGJ1849480.
Hard Education (ft. Ruka of Ignis Brothers)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c3fe0167f6dc9ba792b68851aa31da5c3a46ebdc69a045ac52963c789f7200. 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/US23A1588015.