Marc Collin is a French musician, film music composer and record producer born April 8, 1968 in Paris, France.https://www.pappers.fr/dirigeant/marc_collin_1963-09 He is best known as the founder, with
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 0xb90732225017f91aab254f31a20718f63ec4fc1459376585f76c7fa1af68a974. 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/2ce5fdd8-99ac-4da6-885b-0cbd2038d414.json and https://artists.proofprofile.net/proofs/artist/2ce5fdd8-99ac-4da6-885b-0cbd2038d414.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 0x0c5a13eae676d35c6ed8d153fd8446de53996bd86cea51475edfbc108e1af49d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBEWK0400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150c2e236c930b7c33e7c1426623ce7f8691a208780ad556f56887f9c5cab6e0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRT900700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a1760b4e22e61540b9aa4d2f85d8f74b600ed55deb6e27bd5833bcec9353c8. 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/FRT900700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0a6e024a64db017fbd9440d7a7b448d29d3967542b4fc8027627362aead040. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/FRT900700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31286310ac3699a3b333e29415e77f8d4b703fe1797a036cd06711cff19cca0. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FRT900700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9711867523e4628714d53db06cc16df27c504810cdf96863a3d9f1201cf0c0b9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRT900700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8040915f09536c5f392771e5f5344aa909a0a8594c07fa87feb9fa1c8818973a. 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/FRT900700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b50ad85a4198ab34b6e82bb721ba8a9b8cc85612e164ea360bf866dc15368a9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FRT900700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e774f078eefa1fa68732be20c8c89905c68c0c27f622702a4c15ccd1b381a65. 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/FRT900700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332f7be0d19a0eb433ada4b196ccd55792f93cb7972cfa3b6c7de2eb3f771b3b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FRT900700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb22be647ca42bd895800833f2ad437fdb95ef1ca972a00fb69ea1e5e081892. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FRT900700114.
Hollywood, mon amour (80's Movie Songs Reinvented)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31286310ac3699a3b333e29415e77f8d4b703fe1797a036cd06711cff19cca0. 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/FRT900700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed40c075e26bd1a210ffd59313f4a516469b0b0574e3b0e3c6c466bab37eb5c6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FRT900700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b50ad85a4198ab34b6e82bb721ba8a9b8cc85612e164ea360bf866dc15368a9. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FRT900700108.
All Is Full of Love (Matthias Grübel Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836072446ef5d327503618581eb38fed170198911173ec341665ae8046705813. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/FR13Z2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902712b8a2d2f9856faa7487aeadfbfd491455ca978c0ef8c4b141fa38d07e16. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:07:11Z), 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/FR13Z2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa452edc4a5c18050b767be0935d2a64a5774f21e43091be95ce04a89a736416e. 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/ES8742210102.