Opció k-95 is a Catalan Oi!/streetpunk band formed in Barcelona in September 1995. Their lyrics include praise for the secession of the Països Catalans (Catalan Countries). They consider themselves re
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 0xc8b390173637e94e37b166f2fdbd4c77980826dfc7fbb770d1dcda9860e7bcd5. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e78ee7b-3ea4-4c98-968c-8119acf74fde.json and https://artists.proofprofile.net/proofs/artist/6e78ee7b-3ea4-4c98-968c-8119acf74fde.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 0xfedbb3af75de57d308cbdf6c8a2c1e4461ef1486e8d2c678cfe7cd24999280c8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:00Z), 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/QZDA72174135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6771ae1e28be5711dd8f5d206048cee4b11239a5ce8ed6a91e17e129f567f9. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZDA72174139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d98a560a7e63e93f4eb9acb9cbea073f05d3d5c0403dec3ad484eaf40aa3150. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:16Z), 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/QZDA72174141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69b2643fdfd9cdae3e3a7b579fbb52787a0b28cace8544b039304c822d85a06. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA72174143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97a15f5d8a264290232343ea4c597957de73cecf19616165d53068f9f02fd57. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:22Z), 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/QZMEQ2080571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35901dfe8c2c021dbe9bb7ec49bae68ad18b15d961f2f457d88be35207a0956. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEQ2080573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455beefb545dd45f1d2833b25931480b9f97696ecdbbb88e1c4fda74cf56be51. 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/QZFZ62073383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4884444a07db0ddd5b76afe072d49864c1cfbd44129fef2ae368100982ee9a88. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ62073393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b592c8304731335f547ef88983c4d086d236f9269bff4f58c2e2af9086f025. 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/QZFZ62073395.