A is a type of sabre-like traditionally made Japanese sword (nihonto) worn by the samurai class of feudal Japan. Tachi and uchigatana ("katana") generally differ in length, degree of curvature, and h
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 0x71da05ff7daf472915a922515d1fb84ace856e61d3f00b88a13ba1a861d8e058. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ad9f991-fd90-4705-ab6f-868c5e62caa7.json and https://artists.proofprofile.net/proofs/artist/4ad9f991-fd90-4705-ab6f-868c5e62caa7.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 0xea86ffe34636a54637eb112855c20cb8765a1a59b23765dc55d52888e1d0eb22. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MXF152200422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e88212e2359e1cb89c9d29e4a69d3ab651594e0c04ec6e2d6cdf7b241e6c9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFU2192578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96e3cc9e6a7c3b4fa0075fde893db790e8aaf079d6ac035eafd0ed17cb01d0f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFX2185027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc2e6250d063611ee868ad19140d291ff7efd0076015c357fef9ef755f917cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXF152300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88497bc02c2541ee4052adf7b403840612d860cc09bc454029f24fa4e846f046. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MXF152200833.
Nos Miran (feat. Eiby, Verzatyl & Italian Somali)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb548e70c7c1eba970d5c4ad2fe733dd1fe4d355bb0a44d791121ac8fad504b92. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USWL12200493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589667838253a7252a6cba8f578dc7daf5779159e92ae6b4ddc445dd0ccfc426. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFZ2272814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2e88212e2359e1cb89c9d29e4a69d3ab651594e0c04ec6e2d6cdf7b241e6c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAFU2192578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7594cb0dd4c2377dc9567c70432f3cb2212f470fabfa392315dbe866eb860675. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBLFP2159197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bb2ab1d573126da088e3408b8df4b2b11143297eb6897ffd709069d2136a6b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1AP2074624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb9fafe1855f788ca31634526e6d55f69d9e395752c4b6b010e7567082b3c51. 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/QZ22B2075827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd81bcbfbb54146a10758cab6d493f87ac79fbbb92690a40a7dc28e4c1faaad. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKXN22226290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4637b234fc9ca392d570636dadd4595dd7727383ee8be1af0a4aa00a1228f8f. 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/NLS6R1851586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d5d93c27217034e6fb36dab9460b07cfb6d5937d31cd5d35639f969b425af8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N21944187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd352e13225dbcca19952fd060c7b90f2772db1b3669396bfc5724171b8811eca. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES72281691.