Mad, mad, MAD or M. A. D. may refer to: People Mary Andrews Denison (1826–1911) American author, who wrote under these initials Geography Mad (village), a village in the Dunajská Streda District o
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f992e024a0606579c6ffa436740a7135502591ee20257332891d3486077a39f. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/108166ca-c9f3-47a9-9025-ad0deea50f13.json and https://artists.proofprofile.net/proofs/artist/108166ca-c9f3-47a9-9025-ad0deea50f13.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634a37f615027005185503a1e5bae3665be29862e882e69020bd7d3514d44924. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USCGH1664844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea06c1aabfd5570221063d5affb1fff2cdd97e7063e7aeb1256c70825308343. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:56:18Z), 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/USCGH1664845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5168d34ae4929bcee8b2f17778648858466f7cb05cf7cb72660b9e61da74e06c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH1664847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108e5d5193bbd4b4490771e0137acd6edf1dddffae80bd290ebc51ab836f7d5e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:41Z), 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/USCGH1664852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2706862eb99c12cc729ae9c1af46bf4a0ad6ade789e306d549a7d98d23c69c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USCGH1678508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579f29510195b04b3083749b905f946eb7e7f89010159c4e9e328295878da4b1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGH1678510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a290dd0ada69f0197bbe7b6d8d23a0e8930ffe614ed752b5188fc8f4a416746. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:58Z), 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/USCGH1678512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1825e3566b745832cea05c1d7d8e78994a63a6916ce80ec77ad923b9cafd719. 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/USCGH1678513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e320dee6316f66b318343efbed72ffdfcc1abe4941501ce2d20a1ff312f2a6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USHM91616220.