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 0x2c690b25e594cbf2ad17d2b47a84264a884001198b08af9db78fbf226a6095d5. 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/df3a83d2-aa23-4c5f-8655-45b97b84f68e.json and https://artists.proofprofile.net/proofs/artist/df3a83d2-aa23-4c5f-8655-45b97b84f68e.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 0x279fa15e1b22a40b037accb749328ce82408c54b69d4c78e2ae39455da558c4e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:52Z), 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/PLC061302524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6747be4fd7cff7931a8ed54648b7a01b816da28c379db93fe0acdf6142010277. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLC061302525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180a8b9cbb814031aa08a8e142f4eb6b4083a59cc92e84ee61a506d521e7836d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC061302527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29be6f4b5eb995bc2fb09fe6fa533933c5c2eda3e1839f29a3222ee6d038fb2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PLC061302529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae8521c59fe712f3448044502a3a4945b5a6bb10b33bf88f5e9fe2a90c98a70. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/PLC061302530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba919bb195f79d63ec1fa0ed168eee41e1b73bbc29a837a8d2d59c5c3e12966. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:20Z), 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/PLC061807241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bb13d5d2cc41d5efaafee00570cefbef18787e2667d57ccf1060ad5caf7e13. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/PLC061807248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26649917a2d5b4f8b1c1652cee3345832dd5e5eba4a8a07c963f74b894de2ec3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC061807251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e3ce93ed1ff2ce7ab582b1db35a26de35f5be0258a98ee4bb15e4232f2a95c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLC061807257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7849680708d3fbb3a4261c29ffcfb6c3ea29717404d627963de98ff9eaeca81c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PLC061807258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c23934e0345a557534890d80965ec6e7663bf33aee97d101db3ed432909398. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/PLC062011146.
Ziemianie, Kosmo Żabka tu zostanie! (Karaoke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596d6bd4a0852a3b315139bb6b4183730ef6fef6ea0ffc912d9e2bbf97274ca8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLC062227877.
Kosmo Żabka, Kot Staś, Bocian Kle kle (Karaoke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edd8025db69a0d11f704d463f83d9cb4722c406b9991fb75ba9ef108b7e4047. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:54:32Z), 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/PLC062257859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc372ba21fe3d94913ba23fa0edb451ee5584c6f36591f605e60438b119c950. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/PLC062260998.
Kot Staś śpiewa idziemy do Zoo (Karaoke)
Żyrafo, nie chowaj się za szafą (karaoke)