50 Lions are an Australian hardcore band from Byron Bay, New South Wales. The band is named after a video poker machine of the same name. History In 2005, they released their self-titled 7-inch EP, w
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 0xc4a96b6558be0a5c7e3ca2a00dbaba4537bc0cf8b95fd047a0e37a4e87937b8d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4890331-43c1-4637-aaa9-c8fbd480b446.json and https://artists.proofprofile.net/proofs/artist/f4890331-43c1-4637-aaa9-c8fbd480b446.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 0x79d4d2f433dcb9b92fd2dfdc0a1a5c29f5b25638e07543928c9649a25d52299a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:31:01Z), 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/FR2X41948093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93c050f64e72cc4d11a8cd84d6f20aa4a4a7c65223464e4adbe0909db9f6ae1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR2X41948095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90631a9e1a11bac174feaad43b70103c3db9ad9b1ff713834a3708d9397e44e7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:33Z), 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/AUUF10700275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b84c982753dfcff8e36315960cdde5d22c39de683d87193ccdcd6a3aebd4c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUUF10700276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde736f1ca1d966d727cca28b0b1b4e02b12330f3b32034b457359d0ca4e5bbd8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:08:29Z), 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/AUUF10700277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d4881bb2b5a3525dab3610b49d4e18bdecdead1413f765fabbdb1b00f99ff9. 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/AUUF10700286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0729c577ceae09d295ebc153c1416180d98a6e5feab6b9c7fdaf901761503814. 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/AUUF10800348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a4a1ed9890e222bf28a901e5e6830462f2bb5748bc154d016ebbc247f4e4bf. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USHTV1010242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc44280c676bf65e5443fd039aee1ddb08e6baf6db6ef1f6e767b6b5cdb34d45. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USYZC0801404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e276f10f443cd9728920ec12ad92b7d9476dcc9aa3f2dbd91775eda1eb4eca. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USYZC0801405.
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 0x15d3bc3f5f4f068500b4e989b43105bb1fc9076f6d47981ceab58241257710f2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USYZC0801406.