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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e65b59e9d04cbca30acb63f463809a80846f654bb6a4a0ea02855d09f5550a5. 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/39eb0c7f-92be-4899-9570-08e973aa0cbf.json and https://artists.proofprofile.net/proofs/artist/39eb0c7f-92be-4899-9570-08e973aa0cbf.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca87c6ded75cf5d97f0fccbf95eeabf05ce4b0de48f56a239e6ca32726331f25. 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/GBBBA0040108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca87c6ded75cf5d97f0fccbf95eeabf05ce4b0de48f56a239e6ca32726331f25. 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/GBBBA0040108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170368ebcf00a3a3f2d38983f900e7212306001c1947ecdcf9ddc824348842ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBBBA0040110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe012257572a9859c11df8a96bff2724127c69c2a7030b37bc0e7cbf041681833. 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/GBBBA0040111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa858424028532f3ff782fd3bfbe3f4cc09865e02fc90b74ff50b85420a65c90e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC0601319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e73d97890e7c7738c1d793f295c9a29d770d29335ed4fd1fca66afe75a79bb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC0601320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f5c878ab0b7ef035c107f2f223ff486a98bd98a9d4583cf897b7de21c32531. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC0601321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d470a091da21f08e430f6d90eb6ebf40c0986ce63fd81bb2dcd62ab0a2ad09. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC0601322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2dabc68eaee772cef15bf7110019b865ab1f3e54d45090e7b8b65373762206. 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/GBAYC0601330.
Bach, JS: The Well-Tempered Clavier, Book I, Prelude and Fugue No. 2 in C Minor, BWV 847: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56293b44afa09d203b9b0d5b04e09183dfe0c5d01c502f30771b7f33fe70c191. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBAYC0601336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0896f42067d78b5ff73bf4505ad0da15545b6cacc6c957ccd0116cb963cfd0eb. 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/GBAYC0601729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b1f023143e2ba12fad62705db82bc87f67d319769463c284d21a5ff11bb843. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC0601623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5955c105a618af4ba7cef94a44f988622c6a24dce7acc2be88f33b63592908c2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBAYC0601329.
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 0x3341d4cf658f045aad40deffe68a5ae61e2258daca514b36fa9c23c7efa3781a. 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/GBAYE0501533.
Grieg: Peer Gynt, Op. 23: In the Hall of the Mountain King
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9a52f9378ff9669304963a3a520e27038b70867ba54d923f629d77b6957a09. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBAYC0601323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e21f6ecac6006fa32b1382276cfb2d2be8a24079c01d715af23a7e0c88ca7c3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBAYC0601325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb929684f51be495617f0f92973efb8ed92841384082a1cdbbbc9d3c21546acc. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBAYC0601327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce448a48bf1b6fc8cfa02ad4de1b877534b373809d3ce4b0ac14718bf93de01f. 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/GBAYC0601331.
Fauré: Requiem, Op. 48: VII. In Paradisum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dabc08907d13728018f26ad99fc5894c0404ffd53994fc383af7829afd8f66. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBAYC0601337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730676cc9b5077bc5f8b5e664e4d54912fc132bc8ec7bc7f7e4a5aa96330079b. 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/GBAYC0601328.