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 0x9ca53d28517aa8c4f20989efca83f643237ff7ede152c580ab0e4799458a8d57. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d71d9b97-0a09-4ca4-9779-3c9d6bbf200e.json and https://artists.proofprofile.net/proofs/artist/d71d9b97-0a09-4ca4-9779-3c9d6bbf200e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Everybody Hates Mitch - The Instrumentals
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 0x1e3fdef245cb5787f92721c05f8cb583e9350fa92e86c8a9b98482c07686cb9f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QMBZ92381870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd700dcc76a9d573d70a79713c7abb6c0980675994323cb5a5994e2a552359779. 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/QMBZ92381878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9079e858aefb3508fd0c17eb6abdb7182e0ebece2f045c80b9912175a77f1913. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QMBZ92308221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35ab449d1dc9c96582d982cf52b56e9945815c1552a57adb687ce1e7028bec1. 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/QM6N22243977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4070e4419f95d2ff8a51dd7f00ebbd9c2a120e96c3926ab3ae535240819cd632. 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/QMBZ92308223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28854cbd389f9fc5381d0ecdd3675be11b5bc71316a39e9d5737d81d71461b28. 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/QMBZ92308224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74cbc6ef1b2d479dbb378ccbc7ba7758026aeb9c15391b8bfb6b69ae82ec222. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMBZ92308225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cb4a8b26828c83c03cb1b5dc7246d13dcc5de1691d1d7d3579d434999c5642. 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/QMBZ92308226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb33f99b8e063da2614e88dd76bf5b611776ccb3f20b16cb95ed4540bc1208e. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMBZ92308227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcf37557029f39fa69cadd1ab62265709955b5bad1f1c5b7704ca6c503ea142. 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/QMBZ92308228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd145df3a2db9c9f0b24ef0826777c04182a028fc639000213598e1c00e49ddf. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM6P42339449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b24fac95dc91e835e67c4f227e23de5b96a70f3427a6d17c6d3239c784c460. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMBZ92308230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab3d8e2d542439cbf2f6fe4c1f46599fcab8bf0eeba6eb942036cfb28043f9b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMBZ92308231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3382e03378d4b129e91812c8e49f381bf71309a484f1880a7aaa76112584b56. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QMBZ92308232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d0e57e6f7a6bc1d4fe6813f7176542c3b12486fcc4cdf22de39ffede4205a7. 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/QMBZ92308233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa250dbafad4c05367216b6ceba51587ed766ea1ab526b53ce4e043e60b7cd345. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMDA62137155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ce853e1fe30eb67d7d3c2bc8658873273b0e5758853b1d97df79a1ab235924. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TX2072228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa412588fc55b5f286df523d383b86892ca95c8ac6ba6c79d0cb81e129f6ff1fa. 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/QMDA62137157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc9319d32bd9676fef221fab3369d304bfc6c3dcabe5cae83a022ee47370be0. 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/QMDA62137158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45e00b3d74cd937823e263b274ca0aa5ed85e81101e2c5aea824ef4276f57d7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMDA62137159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3b67e4a3bce9d43e6aca65803125ace1cd263dbbee44af0797de151691de4c. 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/QMDA62137160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b00a5e2baf12706593d4c448419400eb47100cf1033743b67bc268887ec9485. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMDA62101458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca98a3702a680170fd954afcc81d5d51acf614dbde31d70590e2a94bc81588e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMDA62137162.
The Gathering Instrumentals (Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b8e1c7eea1f89366df0e24385866844b0ee24eda401b0cd90d7c4b76bd5e4e. 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/QM6MZ2431992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd145df3a2db9c9f0b24ef0826777c04182a028fc639000213598e1c00e49ddf. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/QM6P42339449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35ab449d1dc9c96582d982cf52b56e9945815c1552a57adb687ce1e7028bec1. 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/QM6N22243977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b00a5e2baf12706593d4c448419400eb47100cf1033743b67bc268887ec9485. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QMDA62101458.
Reputable (feat. MC Eiht, Planet Asia & Mitchy Slick)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940fb36a1403f7bb8705864796bccaa3bb492aae3e6cc4db2af50ab8bd5086d4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6N22432170.