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 0xd5bd517e7af8958d6ffa92ab03d2685d5ac3c3d5f6e9b7338ac9460124191974. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bda88656-fd27-4d62-9f4b-022195736f2e.json and https://artists.proofprofile.net/proofs/artist/bda88656-fd27-4d62-9f4b-022195736f2e.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 0xa94dbd8653bb3a4fb9a980197d1688b8e2035a11c0f7f84553e7d7ba4a80b5ec. 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/QZDA81985054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772b06a7b2135fe2927e85690ac9a85386c89a7c189b4646cc6fc75ab7c90f7c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTB92242794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3936afa1277437ac52c45b82f8e556a78d53c0a487e8322864e38d3c653ecfc5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US38Y2413887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17493404e5173962d0d4e51b09591d2b6576e9554cde9cb15785b3ddee66e0f6. 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/US38Y2421251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3289c7e8e1f974f25f831c8d9a546e5a992edb16e14ca6a44eb63b866385753d. 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/US38Y2421244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb483add2f516811e0b4cadcfe8805ba64936acd43555befc9525fbd2ee78e61. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US38Y2421245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a71a1951171dd337e1e80e12f9c4c988b7ee567270b24c2b678abb9d88a85b4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/US38Y2421246.
North To South (feat. 5past, Coerce & Distrackt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0b0ad4d88e7aa9bf7fd83592953cfbcfc06e52b2f9739e9a701bc192b64be8. 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/US38Y2421249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3d80123f67f9db213b4cb22eff698cb8251b435d4eaf7cf5d324c6b0a9751c. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/US38Y2421254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920828dd874aac28a47cee3d1e2a3d0f92ff8b7618ecf900e020ab81132e36e1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/US38Y2421255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd228bf887440bfdc9d15ad118262d86ccd24735f5d70520b80e9bbaacb2587e. 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/US38Y2421256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68a545e464c2767a0d0d4f619f7fbadfb05c4702a7152d657d4aa4271db6eaf. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/US38Y2421257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d528c5809f3708b272ab0a8f34a7485d7fcf50114cb98377bc9f6bfd36c2ea1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US38Y2547798.