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 0xd3faa85c958297de3a9392af2380db37125cf7a6874529041d08e34269cdaddc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6720334f-5d6a-4a55-a0e1-7fecdf86f75f.json and https://artists.proofprofile.net/proofs/artist/6720334f-5d6a-4a55-a0e1-7fecdf86f75f.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 0xb8b7318f39aec08434a8a6f5e11a1e3aa05eda89627a7963e66df4bdac05911e. 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/PLE951201448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b768d255f99b008047d0dd3f269887158c8d38b07bc5968cca0f22b9e805a8. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:52:24Z), 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/PLC062545365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1edce7dbaa4d23e2117ecd41fb4146c5ea76371df185e2777b7a25386e55779. 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/PLF241401385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29c95e9550dfe0c7476ac830ec2fdbefdff8c196e26a3c257936340f21ca14b. 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/PLC062120423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174e348319b4509bd75934ec123c7ef3e8a6917d13ed18792173b92e5abcdd05. 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/PLI791300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b126b851fb151ef497fb68d2c4d0ef4530f06d6c33bc42a7909cc9ff5104df. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLH511200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a94b4bc8d961ab062ce0a0bf1cb6e9e6ab6212578b682b46246811888b4ee6b. 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/PLC071310021.
Nie umiemy żyć ze sobą, nie możemy żyć bez siebie (feat. Kroolik Underwood)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325cf66a00a1eee4a5c3375494ab724798b9cced215b49a65024ac48e3a6086e. 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/PLF241300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ddf256b20dcefb49bcf933b19975d106ae880563b8a6ac96c122b8d10b5ae5. 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/PLF241401041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84028cf6af7736b9a9c1e384291ee82fd01739945712a7e6524e6761397bc626. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/PLH651700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84028cf6af7736b9a9c1e384291ee82fd01739945712a7e6524e6761397bc626. 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/PLH651700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea72055b2d1b94e4ced9e5458d4d9577733600ae3a3bc24e0fd959219affc3e. 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/PLE951201593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb878f6503c4e2d4babdfaef38fdbdd653cca68be15fbeb99dcdeff3d4afae2ca. 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/PLC062501725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb4895d3ca6b24cc19b7ed2611c54ba61d8e1baae34aeafc682fa375cfaabe. 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/PLC062443107.
Firewall feat. Kroolik Underwood , RPS & Śliwa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732706474849f0bab2ea3b8dbc8ec378ee9c7b3fee414ca3529bfa301b3d18b9. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/PLK561400016.
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 0x5a8bdc1001f112be52aaf330570b890f416e33c8b6645d9398c8726390691694. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PLC061807394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d10710e2c6550748ae911a8f56547e37be5344889165a5f71f64c4089e3282. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PLI791300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187740e932c5950e88193cb44afd8acc2d0e2bcf8e8939938545c41958be8999. 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/PLH511200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c1d374925abef9276f6ec66f075e6e834234f40f3636466852caf2a07c5dae. 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/PLH511200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4886fb85bce7dc6f7af3b169eced78c141baa277d41bb3b587664fb4c42ac0a. 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/PLE951201597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7328f3f790043ca3ea30eeb4652283d47445b3faa2de1eec8c4e2cf4f1f36e8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/PLE951200706.