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 0xa5a545486d4dda2d7c012a599f007cc0d28e275ff8cb850bde6cb0917a65a45e. Chain 2 (Bitcoin): anchored in block 954050 (2026-06-17T05:14:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/432eb685-6f9b-46ea-9db6-8208ea622743.json and https://artists.proofprofile.net/proofs/artist/432eb685-6f9b-46ea-9db6-8208ea622743.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 0xc24265ea0c9dee594a5a171ea72fe3d004aa76e73be43a2a284c017f23b4d6d7. 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/DEQ022260252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd4cb6978a8facd09869603e21cc2ad43111fe0c0f0ca1bdfb135c8b81270df. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEQ022260255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182bd999e9826ad7f0f04373fab23c5cb66f24ddfd01e20bec7ea0ee6cdf2afa. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEQ022260257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b85dbbc877811f4638efc4189f4f3dda262ca697751f7f7b3d419c4ce1e6ea. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEQ022260258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7f4dff5b3cd3ca04096794c5b0d9820b63f4ffb069f0f04fec143c939cbfc6. 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/DEQ022260259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efbb2dae89dc1637933013460b0dcdc9fd8abd33f9057dcb4249627d18ae920. 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/DEQ022260260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe631b3f3b81a155a73f82ceea20946f5b99cacc518cc1d2b8ebbe9182c66646e. 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/DEQ022260262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f94732e00456538285b8c06877e7e87747701c7010482eddbb0cc65e5d0045e. 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/DEQ022260263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d08889e390ada3e0fb9c00d875b7c5ac2021a7193808f62031ace4efd2086. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEQ022260264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4c07972f4255fdab3b45933acd942a2b31b510a558ab310f6591c3aca1ce4c. 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/QMANG2226887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42845d85de5f57505a945cfbaeb7f8b3b267821a225b4b9abf94e2df6e50fbeb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US3DF2256731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8c3ff7e71f34022678804eb21b1df62b95b4b79bbfb4a168cc01a230336101. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM3DF2291649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e1ca6d86e29a7a2e256a468c3a771f3ee55b716551563ab62ac8c4cdd2bfd. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USANG2208325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a50c411ae297f518cfe65a638782444f30f0d3d4c4447d006c618d031c986. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USANG2208326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfabf234b38dc91ac02e6e5e69da69c62341226e6ba77ecebb159908351ed21b. 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/USANG2208329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c1b0e240f4d9e23567bc52699106bbf34dfc98b53d129804766e61b02adab8. 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/USANG2208330.
You Call It Lofi But They're Actually Hip Hop Beats
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6611691439649848a0564bc2e6da484d00b5477dd3385082c4aee767574341b6. 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/USANG2208331.