thumb|A slug on a wall in Kanagawa, Japan. Slug or land slug is a common name for any apparently shell-less terrestrial gastropod mollusc. The word slug is also often used as part of the common name
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 0x136694a1becd7927b1a8dc9fdbbae7b4fc84607c901b83b30dd3c7725c967534. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65be621c-f79a-4dfd-9182-03175763614b.json and https://artists.proofprofile.net/proofs/artist/65be621c-f79a-4dfd-9182-03175763614b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anticon Presents: Music for the Advancement of Hip Hop
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 0x02abcf695ad15d8a68dfb8b494747ed72b737b1bfdb94caebf30f9f60c535938. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2Y0400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd458506a32340cecce93024007dd3ca7f0a1c166894e7bbf75fa75cd37cd1a8f. 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/USA2Y0400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8c68a957d581f3ed7520c155a94615964ded493e06be8cd8ed6dc80b036f40. 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/USA2Y0400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb54f73db7cb8e00986cbdb0c513d096bcc406671887c30aed073e4b9b9de32. 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/USA2Y0400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cd8181b3258bbb1e1d0fea6713dae45358d309ace6d7b28efe586964c4a2a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2Y0400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c85ec5da5dfdfadb79755437827792ff2323f340f5db23f892dfedc46374c0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:48Z), 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/USA2Y0400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b96f30004d46fb8c8e483a60d5e28e33bd79a45c3ca81c4ee8b8c1b99308639. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2Y0400175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65bd6baf9eed1ec52b77324784137e93cfd57c9d568287c5784e2dd933bfdfc. 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/US25X1088040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095beff64bcf56a20b8d31483f5cc21a0c3b1244183ba446d5af9508bec8f06c. 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/US25X0900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90596169a0e62d18e54695c2cd875f8766876cc4114e8257e38494b3b929d76a. 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/US25X0900305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e69a4b9fbeff8f6e064e414a9416efd5cefe5a9df8ba0084a4f9ad99d851dca. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US25X0900310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f0d7c25cce19d9ef1ac00e24cfafd363feee3a2cde72ef7e43a230adc525ad. 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/USLD91700679.
More Belligerent (feat. Tom Sav, Twin Gambit and GQ Nothin Pretty)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb75a739374da881f4d6a87d3fc2683eea3930ad41749f894eef66fdc9f12c47. 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/USLD91721593.
Fullest Extent (feat. Termanology & Immortal Technique)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68b79ce91ebb60700e7f536b7cdfbf804981e5eedcee2cb92d30bb734a31e95. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/USLD90801339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6487474f3bdf87f550e4ecd8e7a59321657c5683d3fa1d2822f0824706dd8307. 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/USUYG1101743.
Ryonic Spaces: Compilaed by DJ Chemicus (Compiled by Chemicus)