Zurdok was a Mexican rock band based in Monterrey. It was formed in 1993 under the name Zurdok Movimento, changing it several years later to simply Zurdok. It was one of the most important bands in th
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 0x9a5fb53c0e85aec3b4ea42557ef7f1ae4ec2aa8fa89f80f017a62227b99b4fb3. 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/7757f70c-a81f-4ef6-bf5c-61757225fdcb.json and https://artists.proofprofile.net/proofs/artist/7757f70c-a81f-4ef6-bf5c-61757225fdcb.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 0x1f5475d1e388ded672a88c834c7a8f8858b6ab2380900a1b954f1a6a390fc60c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:59Z), 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/MXF119900231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558392e4b2040d9a581c56c564d20b97dd597bcde751f7361d6c1d4e148e6de0. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:54:00Z), 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/MXF119900233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326fc68cb5fcf2812448c5ec129a09248395217907939ec9549681e0135f24bd. 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/MXF119900234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0e22be45129db41f2dbd8e85e8da0efa55a3276dfa12168716144e37595bab. 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/MXF119900235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ac6e245979563b2f257000574ea996fa020eb782e47e9120a0556661c1648d. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/MXF119900238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b379d15d4472c8351430f90b8ecb9bdf251bf2e1dd6c1d3eb77a49f5b181df5. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:59Z), 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/MXF119900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119277112714b55b94cdce00271d1cd108506a04bf21dba6d2c9488d02d720eb. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/MXF119900240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5679fa1cf5bc831168e31913ab5660843c7e7c35a2b9e0adb52438662f1f942f. 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/MXF119900241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e31887c01a45618173c6700af9e7d0a4b6d352888c99c58801169aea106da6. 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/MXUM71400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a2aa1970c7ba275def135d166173de9f5f7b67b68ffb11ae0be586487fbc51. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:31:39Z), 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/MXF110000831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82058a9ceff364cc29569ee812fca486354fffa8d1a4c02bfb80c66338ae24ce. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/MXF110000834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbede7e1aac5b14d41e530d9a8beed15cff61dc7fdccab2225861d01913077f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/MXF110000835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1746d86d56819310c5f50e65e6663994ddbc93d810d4159967dd3e5c5bcbaf22. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:08Z), 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/MXF110000836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517b2c6d34ccb4e01b0f34ff6518882c299707d330da389da48e9984be5a0da8. 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/MXF110000837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dc4f39c3ea44fe33cf1e0693314b39190c993f4b7a7702cb0c2f976c8f98a3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:03Z), 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/MXF110000838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df78cd99ed6c27c3150073c97e462c2f79e02812d815915f58b5e1470786b48. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXF110000840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f53a365934212ed5248189195d337acab6bebbd251782aedfba0f0521793bbf. 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/MXF110000829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87928ecbce40c4334df5fb2a9ca0bd55820b67c5ffb0a0c016cb4818b1294e7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MXF119900229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819e4c24772bd3682e0f53737e2ee5b24b1d740d011fc5790cee3e0b62475428. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/MXF119903949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0499ddde2e816b4e235956f22bff0a39bf8b355a067d2922d07957476f507bf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXF110000830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be982ad40d53b92ad2573b2c129f9cad68b7552ab7e66b7f7d033d8f90671d3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/MXUM71400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1f1dbc43f319159fb18b59b15a94053242b849631a0e9c87f045a840d9f049. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:35Z), 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/MXF119903938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa55d9e9936a61dd33a73e78309ac80e765fe6f48f8682b5212bdbb9fe95db. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXF119903937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58eec679624025355e0c674ef84ffe02c0ed946d886bdcfa390b36658cadce77. 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/MXF119903939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1501454d992e4659d3365389a8c157bfbd05e3deb6db8d43e3b19367ba264db. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/MXF119903941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5a3eb9c19355992789278103c5e36cd439953f12a75226c802f74ba2df541. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/MXF119900237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6509b8685194977ffea350e6d5d4b340ecedbd9d677487cba411267230b6db5e. 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/MXF119903947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ac6e245979563b2f257000574ea996fa020eb782e47e9120a0556661c1648d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:31:13Z), 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/MXF119900238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecf15f57d19c9e6ef1586397af2a6cc1638a877b191c77ea17048bf69a0b39e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXF119903943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d7502423cecdac98b4f422873e61510bbfbe42896b4ff52584fc74d5b3247c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/MXF119903944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d11facbb65910f4d2030801544e4d4dbedad6124839f4dcbf3121d0fc0170f3. 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/MXF119903945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e31887c01a45618173c6700af9e7d0a4b6d352888c99c58801169aea106da6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXUM71400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99df045c482fb9054440878051802afb0fe07ddb561992096619d595c5ef946. 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/MXF119900230.