Strachy Na Lachy (properly Międzymiastówka Muzykująca Strachy Na Lachy) is a Polish rock band (originally known as Grabaż + Ktoś Tam Jeszcze before becoming Grabaż i Strachy Na Lachy). Strachy Na Lac
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 0xb8b97945a18e105960af4af41dcb3eef3b365977fe3600a0a84a6db16d06d90f. 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/73994a14-d8b8-44e3-8294-04a6b1baa359.json and https://artists.proofprofile.net/proofs/artist/73994a14-d8b8-44e3-8294-04a6b1baa359.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 0x53ea36d7f38f07c1bd38fa9c540d76f9c709d78b69f2b8e2379fe5d6a93a3fcd. 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/PLE781300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82deba028222d19ee3df774e8f2d7d5fbfd597cb464858b0aa79741e38372f67. 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/PLE781300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2200f425f7e0faf29c507db2afb5c548302380f10091301a9a9ab1e3b4e6748. 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/PLE781300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd8452f1b7d7cb8550f130f4943051ebdf2489248ce057e42e0f8444c3f1cb8. 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/PLE781300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda4258e78d8e1214a074f785047f3e728f7d924dedab92befcfe76d41bcdb7c. 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/PLE781300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418056cf336e902a73e2dc9ef79b4308ecabcf336c620829318a3162095cb619. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:11Z), 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/PLE781300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe5827b1b5cdef666746d4c4d3712b95df89f78559aeccc5050b4c1aa932ef6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PLE781300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab85475ded9ec331ff15fb2855580288761ef4bde1ba153693eeb9ac7d3ed71. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/PLE781300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b45bfc763ea2f3a505bf6b01a71054491dda99322b187aaafbb0a34e5262fb4. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/PLE781300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad3b3a0bee41fc1108b8cf9b62b7ed0a11105adf54cf497b24bab45c35b3960. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PLE781800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cf79493c0598c82e982bf01c9d9ae86859c4eb169c68dc5bb15298418b9098. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLE781800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000c59ebf0100718491e794e3dd5e51c3f1a6455bcbf63bc2132113368dc2e3f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/PLE781800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ddf5c4f49c0e71a3476c85c3b2e72bed3bad17eb49d00de14e59f3d796ae5d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PLE781800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7ed2c4c6d12e1fc6b32b080402914c9a12a993511ed51e068f6275a51857dc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLE781800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4508aa8da942ae2b57f8d1ffa625e86b03a6af66e2acb27d7cba524cd5490573. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PLE781800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b28ce99a064ec8784a050301c0bff5fbe7db8746e30b949fe61e5609fae8a1. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/PLE781800116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d9345384bf61b118b72f780d375ea51f50814b39ccfe93b6082974d5e4e846. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/PLE781800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee754a9656b9dc502836a1d837cc1c6a761222765344e8561e6e1e1a69ae9a3. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/PLE781800118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ba8f64407619edb7d65f6558dd01de821e1691b5d3dc85862b7a5fa6c801df. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/PLE781800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe315ee13787a260f1dd3fc03ce9be01147a01cc0d421b0b57b3280d86748879c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:31:12Z), 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/PLE781800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43f926c752ccab5406d7ad8a4730d5a4934d2b0e9ca916dcfa4ef412646df0f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLE781800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044c97b28ff1e938aeca135b629bedf0a89d97ffebbf11dd36106f87c53a43f1. 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/PLE781300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2924cadc260670723b0a1d14459383ede445fb01e727e5286480d1be28dae368. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PLE781300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c76de63b08aa3c24bf7340cf3f76f4bcf2fef8bcacbd8cb92e8eac4cd622cc6. 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/PLE781300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17aa2ec0aed16492e6b2a4d15e9a3c707a0e67d62cfaabf5924d08f97504142b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PLE781300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64fc7eec4121d26fe0f3e2567fc1fca2b5f2a6f2db743d33b92dd164171f36d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/PLE781700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b98345884c24eaa6091e1cd5f90538a5eb34dc891d4544d29b51340f19cd60. 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/PLE782100115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27534cf0dc04a30cd733befb2042509a89fcab0d58b2f1935208beb230f162cb. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:34Z), 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/PLE782100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6cd35c7d545990d5a214d1237427ab470d0f7b3a41f3b2889212cc0d56693a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/PLE782100119.