Mark may refer to: In the Bible Mark the Evangelist (5–68), traditionally ascribed author of the Gospel of Mark Gospel of Mark, one of the four canonical gospels and one of the three synoptic gospe
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 0x1da49b882dc848dc417d21a2657dc012aa4a20f3097747d5726f37f96ee39449. 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/a42e43d5-1e85-4cea-b32e-e6a9b17ab37b.json and https://artists.proofprofile.net/proofs/artist/a42e43d5-1e85-4cea-b32e-e6a9b17ab37b.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 0x6160c5b7a4021ec4a535b5c0f9c59477dcf878f30ef7bd1d4425f4128dadf302. 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/KRA301700299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bb51a68dee03dcb2e2ecb1758a518ed1ddc6510f5952f4a147791201a6aa7d. 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/KRA301700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3341dbf1a439cf770d1d1a9a5e8bb5e0f058e7d1326374d4892924d593b2fd99. 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/KRA302300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8545b22b4fe6f14afea1a9f47562d24e0157f2dc59a2344b34cfc14982533458. 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/KRA302300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad0b45a0ae524e80154929a7c735ecde8178bee117761156b28a8477acdc89f. 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/KRA302200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b124d102fbac3b56763ead6c16c166f42f42e33baf61f2d45eb9a0316e514eb. 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/KRA302200014.
The Ghost Detective (Original Television Soundtrack), Pt. 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf748a888d6ee6c41fd13739b2569eed864105174590324f34e61343c1d76a4f5. 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/KRA491800933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a550c4b76a709987a7ed1c9bd0af46b4e39bc8fbead7edf31e695b2722c694. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRA491800934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8eedabd5fe8ead5a8eccabd25990aa22208359f160c95005490d8bad28985b. 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/KRA301700336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1075d1ea44216f29ce22f3523528e10fac99c7a3103b7bbe6855882b5b673c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRA301700337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263df34c449529f811a6c5efc3b6827dc4318557e01430fbf5683f174d6374a5. 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/KRA302400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bf8d46fb2b97538943f8dd2cfd5b0d613d7a72fd8bcb73787b5c821505709a. 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/KRA302400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff4af23227c02b4a98f84770ec07d564dde642864e0ce04886e8ce6f2460934. 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/KRA302200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa3d3c53d488f68cbbbb0ea034508fe74f1e32f2b82ac2252bfd030e9a49500. 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/KRA302200273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea68829d96ae784d537cd422393cb6fff08e009297e9517d68666a3c88582405. 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/KRA491601069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0969d801da3eac154282f6f678f1e46443a39e87f27a866eba4dbf3eddaac43a. 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/KRA302400083.
Street Man Fighter Original Vol.4 (Crew Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36623ef5d814a4fd8c84cfcd97be4f220fe464c9fcc61d483e6b68da20575314. 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/KRA492200876.