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 0xf1e754bb1ab3aa6a1a00c3e7e58eb1ff699964dadd10bac1c2acd90bfb6eb433. 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/0039cb6b-9f56-440f-8dcd-83b8b8b85276.json and https://artists.proofprofile.net/proofs/artist/0039cb6b-9f56-440f-8dcd-83b8b8b85276.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 0xe3d5f2b321347fa6ecec5af159f08bbaaede2d4f5075f9afd38d0f53ed82a191. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWY2013254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02b913f0d755fa5d73c4fd77a0442bafd211e4dcf352a7708d0c2850eb767a6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB3ZM2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d766d201dff07e6283d3134fed430f39db1917e7cbf8e6443619c1f333402d6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ5FN2419284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dddc177ec4c7512d4009892ac375c8af3a41d94e8a97981de41e34d0916c00. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5FN2419287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f1987f4ab11cd7a3a8f06c4a2ecf325d86c7eb96a3f75e304379a6ae3ac5da. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GB8KE2418619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86aebdc62fd999bff0717a42bcaa2293b38f2b1f1dbd3b76fc088fb832a465fb. 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/GB8KE2418621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bede06660af9a7242cf69bbd0b45aa0b779ef6c007eb37e2489ef7d2882069. 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/NLCK42504397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf726c8db9c7a38f5f7f4d6e9c8440dadcf43ac444d68f699d068351bc18a89f0. 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/NLCK42504398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf264cd655f680001a31aedc663426c0fa0e4cf54e62d7ea09c17af2f05265279. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDD2533832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de965c06e1a4db8944a8588aff279154968e676a0f8d1a8e0a894f6fb0419a5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZWDD2533835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c17d78df26a37a1a7bd717b6566b699f0e131dfb0240920733cf1327cab92c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2598657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12057619d0e50c2cd57cf2f9589bda856260a3787d5bca01fb1b678b3982b2c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBKQU2598658.
Dank 'N' Dirty Dubz 4/20 Compilation (2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17774ebd5d239d33bc07f52e424a135934f4227036bd6ce3dfbe5d4b0d9a951. 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/UKU932480981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa0601b745628bb54d731ffe134eecd80cd6a20332dc49e045298ca2d181d8d. 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/CA5KR2325859.
Dank 'n' Dirty Dubz 4/20 Compilation (2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5d9a28c058eeff2753e5aac4a1e136bdcc9ade921d20b814c653518a15ccf0. 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/UKACT2130679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a56d4b4769c010d3a21e9fcb657cbcb0b3f5adcbc301f445e7eecf83ec5299. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/QZFP52119305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a38c2c4e7ffb688233f5dbe4b46c7497325452c7d8df7e00d871a482cad922. 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/USLZJ2542322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd115c7d4fce6bda05849990c6aeac6ffaccd70f8674e87e2b11bd4e2deab318. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBWUL2118178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3355c783ec17a5ea7e78080d327dc22ef76eda9ecd591f94abc0f180aa22b9e. 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/USZXT2556514.