Mac or MAC may refer to: Common meanings Mac (computer), a line of personal computers made by Apple Inc. Mackintosh (raincoat), a raincoat made of rubberized cloth Mac, a prefix to surnames derive
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 0x5796832950f8677cc8b31d8833aab2b9ee6562235d355dd6dd7442d4d353879d. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa290164-1262-4a21-8863-222e723b9caf.json and https://artists.proofprofile.net/proofs/artist/aa290164-1262-4a21-8863-222e723b9caf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Great Adventures of Mac & O' Black & Parental Advisory
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 0x36ff2b5d388637476bc6b15ee0f842dd7154cf043fed051876b4d1ecee927f4e. 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/USBAE3362384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab79658e521b4d932e4f1ba2c40b2c66dcd234ecedcc8e7f29fab9781bb328f. 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/USBAE3362386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc977297da7d382be646bf987c26b28f882e73b934ed9c3096cdc799a20737ac6. 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/USBAE3362387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede65c05be53f960b427a6e43e728f45afd8e52ca72da1cfef60c5412f2d5179. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USBAE3362388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85f4b74ee5ed09166a82bf8dfc21f25139cb908ce427c1a9edacdc59e4f01c6. 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/USBAE3362389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2599bef0cac9234693aef855016d83c71775d281ee0a616b37451a82bba5d88. 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/USBAE3362390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252f915f84f6b056987284303a17fef6b13f4ae4fedc406c68e6a90bad1bc69f. 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/USBAE3362391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647405d22a039fac54517d8a004a4ad89ce80b2b781c1f480f3e7b7ebf7d54aa. 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/USBAE3362394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baf927d691406a6a567a9c56093021ee0e8c1f728ae6cd5f1bc26709ac19f0e. 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/USBAE3362396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfaea0b2a3b5e719efc5168e2667ac59fd3c8fea19aa377bcae596638a7e523. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USBAE3362398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d823016314edd91a0574de67fcba8a6e49621943f186fe068b6581b543a895. 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/USBAE3362399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eddd6fe4076375efc452985c7cf212586c15f81c57b0ed4341fb323c83d457. 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/USBAE3362400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775e02f91c1a796d262c274d9587794971b73cbde735bbb3111e8ab35e9d324d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USBAE3362403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2a3fa98f3682e78fd7d35e4f43e3a969e1ae794931fb37f7c3c52f46ef31f7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USBAE3362404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1af987f2235e282b224101a6a0e1bdfaf3cc563a93ce6e65d2867155d3a4d50. 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/USBAE3362406.