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 0xe3a8633269b1a5bc93a54890c60ce2de5fccf4031504f070ae2f422501c20ae8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c2f932e-f86c-43b2-b4eb-c7206b898096.json and https://artists.proofprofile.net/proofs/artist/8c2f932e-f86c-43b2-b4eb-c7206b898096.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Su-Zuum's Lo-Fi Hiphop / Chillhop Beats, Vol. 01
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 0x01956713f1a41f040b701eacd36ceb6d4be98ff41fb50f5b9e811ca2857ca431. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZ5FN2046758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46fb2094069785bd4b2a1b1e3408253bc7f53219285a2677f073c6346c7d9af. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/BCD4N2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ba227c01706e4017219cecf9cfb56701a8f2e1a323ef01f9134edf7e9c5b6f. 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/DGA0M2461359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d5716f852eadf0a3cb152d976244b701c46f687fff39a06e9a38945495064. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USANG2519485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f366288c4642993c359e14356baf659699b085a6f93f9dbb2486eefa6322dc0. 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/USANG2519486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7db86e9dc94f8b8da063b3a54d579b474b6eb2c4a77283934217d3cfbb4ed3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USANG2519488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5336eaa2900ea9b25c73e3a3874c46e24d260e51f94eed763815125c8132ae2. 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/QZN882231972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0366c733b77e50b98f66632f46ec74f079c017d335ba48c013f28f799db90a6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZN882293654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0dfaaf248f62103a74d3cca17a7b2ff34b2d87163d7915f949c88cc7b6fd3d. 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/QM3DF2277842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bf8728adfa121ca83d4fe6a03e27483125e14f61be06f8c6237a73ebcf25e1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USANG2131849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46fb2094069785bd4b2a1b1e3408253bc7f53219285a2677f073c6346c7d9af. 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/BCD4N2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fc7f3d4853788c2ef270dfc8d514b48ff9b19b9f344df4d00e4b468b48c0b6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLV62138314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1263871994fac3c96823bb71761d59c26c3f901e68fe3b69f490d97451e95ac. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QM3DF2164185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07208bf66f66c41c98f1de7f7549d1b1711af3af3b4f06c0158e91e2a4e3d45. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM3DF2255218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a9ef0dd9bd1f9f59890d3f97441f66f914f1da09950a77368f9757db281022. 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/US3DF2072674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781405753605ce512cdcb4be9c8b6709a911efae88424d5d9010d063ace01b1a. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USANG2201900.