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 0x362fc9a231829f108dd93fde647ff40be560a7640e028a3adf14bd9241e9a1ec. 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/57a462c6-720c-402b-a393-a0c1949f2ffe.json and https://artists.proofprofile.net/proofs/artist/57a462c6-720c-402b-a393-a0c1949f2ffe.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 0xa4c4578fea8631f98040cd9275cf5d7f71c48dd9a0ef637f7b43677e2c11ee34. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRW50200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa521aff098ca70548d6474e60b6c2fad45a0f509a280a5ca2cb3eea697b37ee3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US2R20500384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da49b2a82112795a7ba8c4c854c6fcfd3729b017fb9a2b1b42dce85b602507. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRC11500813.
BREACH (feat. Ty Dolla $ign, Wiz Khalifa & Mos Def)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa449aeaefa632bcd3b7a63e20bfed794225a533984cbe46e968536c5dec5032b. 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/SE57V2412151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31675846be733d8ca8104eb86897a5203cf39f4ec41723cca2745dd8d9a4ea3. 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/USEE10340634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432bd6b215d561b0350cbae3476d579f5ed44e158d42971dca0c79f871f8ac80. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM70749097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed1f010dbfb3ce40e4f35fb753765581a07ec057d0a3059efc85f0e56b31a0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM70749130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0ba3ffaf6ccf32ec52da1d43a330a741224dff0f9e910abf32139d991718b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDJ20300915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea59c9344a6f34194083d85e420c7bb5fd83963af60ea8809eb9223c1b6c4bda. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/USUM70749431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960e997ab1d2757f66746551ed4b0de06e76bdfb0d7f59c6f3027e025b0eff07. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/CA5KR1836167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d520f775b3bc1d7b9455fba2528f6defc0d1dff0c7226732a577843945bd7d. 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/USDW10300643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88d124eccc601b5abe5915c862d5b528e97d8172419bd427957d9ed4ed84135. 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/USEE10340212.
Jay Deelicious 95-98 - The Delicious Vinyl Years (Originals, Remixes & Rarities)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaa3798144aff1aefb4a62373cb9b122fe3535c9aa8e0bc369db3459d2c922d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA370513561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce37364f50fad6c543a9e19ee8fa105d5223bcb3642fa8b9a695acd696548de7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USRW50200035.
Sweetest Fruit feat. Mos Def (Produced by Anas Canon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba267d5765eb097a581f8cd659f4ff9c66b9d593c1a3e63cb77aad5c2fd8d5ef. 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/USAHS1010010.
The Day (feat. Mos Def & Jay Electronica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82b77fe2d4b88d33182ce56b235ac81c1875b84dab6b59a4c05ae42b1a347f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1141489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63454379f662173e1b08923512f9311f512da989d0581c03c3ec1006a67c268. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYE0903021.
Sweepstakes (feat. Mos Def and Hypnotic Brass Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17896d44a2ad8ee6a9316ab8eba7a6d5579aceea5179b5ecef5250084960817b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYE1000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea737764b185f7595c9987facfeaac8057cd26bb98ab803243dea1cafac3dc31. 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/GBAYE0903020.