Memo is short for memorandum, a document or other communication. Memo or The Memo may also refer to: People Memo (nickname), a list of people Memo (footballer), Brazilian footballer Emerson Gomes
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 0xc952b4ab1dff5d8212062faa1b611e5802450b2ce825c5c35b623e94013b8b9b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47996fac-a3e6-4a16-bf71-970ac9e2030e.json and https://artists.proofprofile.net/proofs/artist/47996fac-a3e6-4a16-bf71-970ac9e2030e.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 0xfcf102dd8302b1920374079215c6046a1a3580ca8a5133f0e78dde5f9bb5e6aa. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZW9L2447457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc28f433a052d0200a7e5f5d390876558c697125eb459070f51c868d7fb8c365. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZW9L2447423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddb1100dc262da26cd5d72847191cd7b65d9d68dcc6af3f20b4630139315b41. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZW9L2447426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a40acd9bcdf34d420e7b0a6d20f7c6f16370af708451059fb5e38247ded93. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZW9L2447442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b8d830671d903d1ca3f759d3ac79f272401eeb7da863306a26886f5ef744a5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2512297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e55eb75692fdada30eb3e8a99f248e532d5d763d50c533ad55e5b9f8be9bb0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2512288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2128d84161098f292a8462750273bb8de8fff8eb2c01110c4c42e378ffd227. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZGLS2512292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9682d292dca99ad61eff87b18cf8600fe55d2247269cfac3b6a821683dacc3. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZGLS2512284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a647867053d380ebb437a2e0ebc8aac849b781838dc4985734384601477d3b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGLS2579515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc66bc7ffe13a714e6122b84d957df754356336d8a5407067e4c8a7fe897d22. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2579422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa10290432c82f72a3438385c5e6d29810fe0c20204ce284d81bc5821bb9c4c1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZGLS2579562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc5e6d9fdc7cfe2020357ce837888759b1d5f6e65ad31946146b4688f590e9. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZGLS2579417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd9d66cdf1a706a1c7edd6739d225a40d2fedeb59c35f5025bc404f5ad53e9f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZGLS2579561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fffe4a5c6918670bb9ea96248b9cb681882b731fc4ad728143db817d2f66af3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2579362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4246c52ef47f8813848393635bea514d2bbcae19c6190a71db013707089493b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZGLS2579532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b5e4708ee9e381d2a00086d862bfdac9b2f790a258b55ffca786697381d768. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZGLS2579442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc91df8d3ed597c5dc634e8f192d9c77c0f50ac7657725e25760bdaa302dd79. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZGLS2579462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27339f844a44c954533dfce3eeefd34995b582324feaebf27a62a5236e1a34d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2579429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184ec2597f7b9cb129d0b2e87ac682edbb22c358efa02f91ce6592d23013d276. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS2579469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd013e2b294d7f608b0a5dcb4ec0a43e3fe8795c11996a751b9e1cc9169d5985. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGLS2579419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cbdb225ea86167b48442d75155413e63756e35219207f7a66bc944c76947c7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZGLS2579467.