M, or m, is the thirteenth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of several western European languages and others worldwide. Its name in English is em (prono
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 0x0eb8b538c6af57cecb91eb4ea25ae6535924a2b3ceb5f6601ce3e6476e1a4ad4. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52de13b3-e8a8-434a-aec4-f1be5c76fcad.json and https://artists.proofprofile.net/proofs/artist/52de13b3-e8a8-434a-aec4-f1be5c76fcad.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 0x3a46af0d02b5336fb7d146dab161331cbf00e3bb930c082cb2a9cb6fec24e300. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FISR61700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60980209d5a6665cded400043bb15358b7f5b57848dcd4ebb5151be478cb509f. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:59:51Z), 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/FISR61700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4cd4f5721312dfb9ce8fbf38e54d8a6e5bf52279a317073ace132348909150. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FISR61700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e1fc832b6ce22edd73b97d64e81990aea47a0120cf40ed578d1aa51997b5ed. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/FISR61700044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094d4cb6b34621558272556e7d37265b1cf5e24b51ccdbda35f9ea264c9cb2c0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FISR61700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae0a2d6fed7d42a62f06d2b06ac767eecb5fb9e1c9d50bca5ff253ada87e24b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FISR62100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a1c1327b679e7da4d8ca9c9cc13fa2df023f3fb6c22563c7928daef2d4f300. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FISR62200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0207f4cb63cc97ba36f7973262200a6da0234ba1e63b0aeb795f22f5c776c1f1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FISR62200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea13b68fd266b8fdb8859718204649506939f254a7695a36c3a1c64ed215e7e4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FISR62100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe348833e807e09adaa9a8070df61cef581058e135d413b6e966297da87cec87f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FISR62200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4377ab5ad8993eadc07516ed9428e4f1f70e17b9b331719be373259078b03c78. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FISR62200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bab965132f7d855d21ad9ca8b960ac628a7fd9724423b534e605c509ab889d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FI9PF2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877d1b4bc0a26bf82757de0a0d059db5540dc6d508a3cef79181d56d41f3a715. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FI9PF2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1e8eabda8ba2afb467e3391dab453e2c844f2f74f42a13bc9e85a7cb05a271. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/FI9PF2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fd9e853b54a4fc1bf28db89092634028f813d2ff843b968f97ac5c47fb461a. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/FI9PF2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0da2be3eca2aa9aa5e3ae860eb4a2a04ee15723a6dc9685a9bc5a838eaa67a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FI9PF2300081.