Marginal may refer to: Marginal (album), the third album of the Belgian rock band Dead Man Ray, released in 2001 Marginal (manga) El Marginal, Argentine TV series Marginal seat or marginal const
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 0xe1eb9de55c845990ad40c046248187de0b6dfb640d7a2cf259f95f37cc0e8e35. 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/7ee19764-386e-4ccd-ae57-2b85b6e84fda.json and https://artists.proofprofile.net/proofs/artist/7ee19764-386e-4ccd-ae57-2b85b6e84fda.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 0x107e96c3afb9a2d37074dd4dc9cec2ec1cea5364046fa0877866b8a150e971bf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR59R1983318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb33175eca787f61c69c296c70936c7cb9fffaced99ab1f25b0cab00808653dc. 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/NLRD51967558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f13c7e24e4fb3dffc4ab749bce9e2e9d94af9899cab697f444c0c7c65ccd33. 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/NLRD51967563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1600870d9d435306cb9492f8f982034f987977fa25939b39d4ebe6d4f538f296. 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/NLRD51967569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733cea7e50186af1fc0962f37903fda5928efb4dbb27b0cdeac6b6c90a3635fe. 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/NLRD51967570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9bb9966beeaffe893c22dcd307c89b48732d34120fa1ce29179d5861a0d120. 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/NLRD51962432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde88fd66a697df729adf8802cf8ba35874784d25e10a9ce9a845e06ad406305d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NLRD51966186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f04588c5bfd067bb32f19e89317c6d50a8e733b03b63d9ef466366b0eaa294d. 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/NLRD51962434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8910bf08a02c1a9bae1e64eee5990d859172543e95e94b7ab7d36d2aec873114. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLRD51962435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de6d5de86d4ca00337e10da065218b1845303a1d039cb76480e81fcd827c198. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLRD51962436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd214ea4b91096aec07e8220ee32b1ac9875bf1ca5c7bd70c245c9a990576a1f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NLRD51962437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad68b8d8f6642564717abc00f1c816e426f94bd2389160f442a60c5d8d2b7194. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/NLRD51962726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d03265a7192baee7ebd94c270183d7fc474e42a2a967af8b2568f7d86d9586. 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/NLRD52072581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b9a2f8b222cbfa054153d4eaf51b26ca7051f151b9290264ccdd96a55ab4c5. 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/NLRD52221557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0851a5bc18c009f95f7aec7a9cb51bc8114832607e11adb5d9d59b1a7c003f. 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/NLRD52221631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc6b15d5b3924a4a020eb92976b5a3da33f9733962d5cc86cc076fb56091aa9. 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/NLRD52072627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c88d3b57ede9fc11a96fcef132227b85cedf685284197332eb22171a3510e77. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NLRD52072628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b49837456e1bea1572474963706095f41fe9a4f5c0e657bd5814f062604dd28. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLRD52072629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac54a539459b41283e09dbe2c04bd0afdb4258f104e4d9275c4aff46d1ad9461. 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/NLRD52072632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6641e9fbee1e4024fd9d28668c465f5018f24b931486a66da7cac7ac8170f8. 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/NLRD52072939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152e256f8fe0895c7f0e97c3d3d7cbe1da6ac57cbeadc6a961eef9517977330e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/NLRD52072634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f81bcf41991d0097eeb1b1474704fc5407c1eaeaf21246898ff8b4e5201bd3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NLRD52072636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080da70c46b074a03494d9dac2906b3d762aa32fc432fffd3ad4e5139b341c18. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLRD52072635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f14acb0085f05b0bf35d18630412d50d1d44eb295212c7a8acfbc9ea97bc51. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/NLRD52072637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b9ab0f22ba5ad10d5ccdc63b32f741bc4d6612d3da719dad3db7e30853abe1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLRD52072638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3fcff955f2f36540fce2b7e07f7615ef47c56c8ac50570e94b22685386abe0. 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/NL8RL2404992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b0bfc07954706be4e655a74a8183f0e16687a0401887eeef7b9094ee484d59. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NL8RL2404993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2e4a0f6b34325a583fcb3dee8d01b74b6de63bb2e429db2ca0af32cd9759ce. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/NL8RL2422492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aed993230720a9f145ae5c654a1bd0b8d6627a2b074e502caa80de574c3584. 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/NL8RL2429720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe7f5c8362674574587ef8420755d06cab8293323b06dee77bc0c99011b1f9d. 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/NL8RL2443356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c29f353ddb52cd1bef500173260266b333c464a482e7d3205d4d948f383ef7. 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/NL8RL2443359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a515752b08961402a4a3ee0148304f0b6883792ffef72156773f42c87973a2. 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/NL8RL2443360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2e4a0f6b34325a583fcb3dee8d01b74b6de63bb2e429db2ca0af32cd9759ce. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NL8RL2422492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358fcbe488aa9ee70676400732e41e418f55bdd02ea2549c2759d8068d00aa30. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/NL8RL2443361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2e514ead7b7fb19511ad5b54155068af5d3a71e6e4368328b4b46e4f6e20c7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NL8RL2443362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429c848928d78f2cbb17865c1c035b14684cc95552e22fc535d36c72bb278eac. 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/NL8RL2443363.