Greg Holden (born 28 February 1983) is a Scottish singer-songwriter based in the United States. He is best known for his hit charity single "The Lost Boy" and for co-writing "Home", the 2012 debut sin
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 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 0xb279fac61ff525743edaccfb25bd253458915e3901206a67d6554bf5ddc39d2f. 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/2a756b86-d3b2-4f04-aace-e9eb2f2c7d58.json and https://artists.proofprofile.net/proofs/artist/2a756b86-d3b2-4f04-aace-e9eb2f2c7d58.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 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 0x0870ed914880146a7e5e9807aae7dccd605ee0c9fcc2e0a4ac4763255fdcee6f. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USS1Z0800156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33661ebd53216023e7af8a5152731bf3e9f22ed5f71f1441ede4b3055b85481. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USS1Z0800159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac1491f318d2429a5b87a0f396c715d18d4c79239c362b47e1404fc31ac677b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:56:59Z), 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/USSSX1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfeeb158f3d00da2666eacbb0b03aa0557c0fe37e6c2598aed078957c394efea. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:47:21Z), 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/USSSX1200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470fe44ec4d7c7ee6180c980f0a3087575bba1846f606a5e7add18545094f3ad. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USSSX1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7e5f73fd314b1052f0842471b4e00d58108d849cd3daca5bcf63aeb3d42378. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USSSX1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3452b0c7462e5c477ee0b1613ffd356792bfb5bca6dfefc4b980d58cf24fe997. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USWB11500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5c2fca10438b728b6d872c336f89bfcf66c482068dfa06717ce3df48c650fd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USWB11500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ca09864ac74d92c259f98b1d085dc513f99be40315141f95603b94186e1bc0. 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/USWB11500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bf3aae5bb4073cf7c754680fe5c64aae0882892270c93ce397907b33402603. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:38:53Z), 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/USWB11500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a9057608337b3bc55bb7733a8c27ae723506653070f90532b19690e09be3b5. 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/QMRSZ1800768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52d5e6582c1282a85b642408feb479d3fbeb51ebad79a5a5879e3284b884849. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMRSZ1801845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fce8d594e862b5d94d3a61825b0e20390c7a3b422525f8a10eb2ca93e10aac5. 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/TCAIX2454564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f9d5c8dd70606ba8a87056660fa35a9482bbd343b4bda9639297ff7d9ced12. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAIX2454588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302f46471c5dc65e01f8fdefe66927801be187b0c33396ae00bc2d558136c6a0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAJN2560006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb4570296d9da6def1f13f452c83d9a06e3ce61864ce09fd08d37033b631456. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUUM71900268.
Far Cry 5 Presents: Into the Flames (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7347f571600af882890d092cd020828ea1810de0af5ef424eb40afe94f1660e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA2BN1702128.