MAK may refer to: Places Malakal Airport IATA code MaK Motoren GmbH, German division of Caterpillar Inc. with headquarters in Hamburg Makerere University (MAK), a Uganda's largest and second-old
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 0x3e4e75995820ae83a9098b1747be0d350b9e3adc12018ed98d2e4a4bb860eda8. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d958780-2cba-44eb-9328-e1f344fadfac.json and https://artists.proofprofile.net/proofs/artist/8d958780-2cba-44eb-9328-e1f344fadfac.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 0xd11dee878c9a4569823639e065274f09aad1d12e02a95ff01c290a1b79d6fdae. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/BRP4I2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1421d3b004f65f8ac4d129a7bb3c93acdcb1275f6e7330d493437de8f8721f15. 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/QZZEB2417865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd020ef91609891119c8e2168300d3dbb755714a1722fdaa9b12e22feb4357. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRP4I2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e20a5c843e345d53e2703722555b1fef0e42b2776f18e6595a8db3c69f6af. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRP4I2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc415cbe14a5d4b4cc945f95de3079ddf6c35fb1b6f2db1ed8568abb443d1fb52. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRP4I2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e7df10adee56b81efe3dc8684f5d477cfaf340aa6bf28ad91891a0ee29c6a0. 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/BRP4I2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9629c7016888379b670777658e769bea349db3bb45ae03ed88034ab4981377d0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZW9K2324878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461ec8626e7abd22fd1a1d21308aa47f09db6cc09cce1d1ceaad71ff7c2541e8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAHD2343512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7058aeea65b4c31e31feaddffc687f6fca6f54712aed2190794fdb2440ab5d49. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRP4I2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc29bd5fc339a5de343c937136d15d3212020f8d0cbe9ab163e3aeda43737433. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZGLS2162085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87e98e9e5589ac6930a61c01224580c056908c460fccef8a4e10023b0c3c6e9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US83Z2104928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585a9da6c3ca8857324733aa0230703cc782d03a2699e897534512bc26e06790. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/UKXN22072216.