Mark Orton (born ca. 1968The Holdovers Interview: Composer Mark Orton On New England & Hopeful Melancholy) is an American composer and musician. An alumnus of the Peabody ConservatoryBiography at Hans
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 0x34af35b825e8e19256d39a4ff4d2a649eb88d170ea94f8a7ad7c686d9f374c82. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00a41fd3-33cf-446d-916f-fbcfe6de922f.json and https://artists.proofprofile.net/proofs/artist/00a41fd3-33cf-446d-916f-fbcfe6de922f.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 0x509f056f40f83b924e30860381520dd168664465bc34e01527451e444715e798. 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/US5940904420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1745c386ae6c192e06fe8715ca56146f69815b2cd2aa44bfa193dcfeb40b4f4b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/US5940904421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906fa8393a89ac805a9b8c412a538db0a7df1a700aae20f338bda5bb1ee78cd6. 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/US5940904422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217970189a047469d6572d8261405380490113ee32a50fa850ca9609c1c8ebb4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US5940904424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62956103107edc462029a5708f4183b17ec043873e0ccc15558b76a34e774e9. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/US5940904425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8269b4e4c461ed64b44ca9643c274fb6110799d5b6787fad0489f8732a2f0330. 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/US5940904426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50cf34bcb125e3740c645dd2561b3aee82f95f54d78f070f591d78b8f9db2c6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US5940904427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd62b72792e8dcf0e9e756a93b4d6418ab802d55809c10012e93fa96c21092f9. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:33Z), 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/US5940904428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ed2ba2200acc9e9a05159f8725e2a64fbec605e46b3d9ec2d5ec3a698cdfe6. 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/US5940904429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6649dc90fb40cfb85086096a6e4f1d22ea8788033b61da0e5d8ddb67ab623770. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/US5940904430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ed1df5315798e2a224cad883a154e01f5d090999b649aaeb0645c514f6e3a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/US5940904431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d18fbf3b5a7cf4781f0262fe5474ce9fbd5e9755859745350762e56e674bdf7. 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/US5940904433.
My Old Lady (Music from the Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c69ba6c6a815c42240795ab7600727513b0ab6af9b8da06094d2a439c1e2bc. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US7XH1400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73631d4d80c5fc49a414c7716195fe0bf98278a08e5b17483bda5b8cdcafce44. 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/US7XH1400038.
People Places Things (Music From The Motion Picture)
12 Mighty Orphans (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fdb9d407a8842aa0d0c0d4b601a6ef3c7b0e7003b3841dab2a838395063d7f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USQX92102011.
Somewhere in Queens (Original Motion Picture Score)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5cbd3d5ccd12ee1cc0b87c6713db960941d6ac91a9397e2782a843be035d91. 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/USA2P2331491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97088d6e43cecea32f7762c7efade246a4666f7338351add5b7683ca2fb7cad. 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/USQ4E2205109.
5/4 for Constantine (from The Holdovers)
On Swift Horses (Original Motion Picture Soundtrack)
The Boxtrolls (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc08f7e07f209f7bdbad947f665af9abb09a5ee94d4d8ff681bbde700104107. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQ4E1401076.