MARF may refer to: Mesothelioma Applied Research Foundation Messaging Abuse Reporting Format WG, a working group of the Internet Engineering Task Force to standardize Abuse Reporting Format Modifi
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 0x6588fa74f14d143292ee19c189c2214407d27c6d550b1b9ba3ff33d938b6137a. 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/250f03ce-0930-448d-8ef3-9893b6d5eded.json and https://artists.proofprofile.net/proofs/artist/250f03ce-0930-448d-8ef3-9893b6d5eded.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Headphones (feat. Aron Blom) [Extended Mix]
Headphones (feat. Aron Blom) - Extended Mix
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 0x915b92c9c3263514855359e0df185eadcc3c4333483243f7159bae90fcf4f0ed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLZ542302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b076a987ea9c67f4564071145addba29d9d04176b032b79a94ae7464439275. 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/NLZ542302099.
Monday (feat. Philip Strand) [Charlie Ray & CAVALLI Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9463ab3f95762dc06c060137184910f32fc8207fcbd470223a02244d5741f4. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/NLZ542301490.
Monday (feat. Philip Strand) [Charlie Ray & CAVALLI Remix] - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6cd7f6a456601b9a3f3ade340b041aab1e8aa43c489b07c68a1cb8b5c4edfe. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLZ542301491.
Monday (feat. Philip Strand) [Extended Mix]
Monday (feat. Philip Strand) - Extended Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6419c932205816159c1dea33eecebde914714535d512603b9a1200d4955f33a3. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/NLZ542300249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0fe61c604ca8e40418d48982f7196dd88ce7a7efb82c7d4213c21eba7cf994. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ542300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad1fd54f4af83330049411fafc5723844b52f6a9caa46c1fe155edd9b48e9ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLZ542200910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ce536b52cb1baee13aad60f96685bb1d4dc4f43edc692cf0a6092a3daec3c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ542200909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d8e4c03159602219606882f51b32100f25895b773a1e1b0b04996cf91c8703. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLZ542200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e3c34ea597e4721893713203d178407555369a4859e43875645f17e3f97941. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ542200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dba2bcff43b8085a998dc59e85f00e9dad408a39bc96846df7bbaaf44e13075. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/NLUW22101415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d87066c0e7eb4a9e7f3458b3e5b33a07b55e27ae837cbcfe9ac8b03cba265b8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLUW22101417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0111f17da033f6f32897f8421f013fd6f13adbdd0ac7fd442b19ff457fd7cc46. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NLUW22101419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dba2bcff43b8085a998dc59e85f00e9dad408a39bc96846df7bbaaf44e13075. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLUW22101415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a227e0e2cb29d33b819950dc9ddcd02c3683248aaed31eda84787037d31c32. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLUW22101416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53258b6738c7d6b98747bf1abeb6c123a2f6c5d8a12639d2e6a40994a8b3c35c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLUW22101374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf19d382b861cef0ce1ebc4f55ba399a5806de64fb4766501319c213640f3b5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLUW22101375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6bd1961fd4d360d666a19455a40f6863972fffe0eaa5f8a40a845b7f439fb8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLZ542001867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c48fad95c94c830d1c821e1aa06ff9b31c5a973c83306a2e9b0cec278d061b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLZ542001868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaf8a79bf77e604e63635ced7caf8912813d7134e1562c26bf01a535a6cc5f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2000322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c670130122696fef468c4c28fc151f82c8ad882274b39a5845cdff8f5fca11. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEN581900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fd49f68d008d7b2d680c2fcd1a6c18f8befaf02f676ac9c11e9324b9cd93c4. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NLF711714230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98481e9670bff438a8306522aad8463da6ba5bbb83685e78bb34a558b1ef8d30. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLQ8D2100794.