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 0xb1cbf0199d1d428b3b6ea08322fe150915c2a5b399c920679cd35a4e98f529cf. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c02ed10a-840c-4a5c-abba-00ed2c27908d.json and https://artists.proofprofile.net/proofs/artist/c02ed10a-840c-4a5c-abba-00ed2c27908d.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 0xcf3676507c141954affbad5f20da75c07e48162228a1d53a50c98696b38c5c92. 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/QZHNB2116710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d5d6638b2a67f8506b97d2bd1b2714b2f0e92240e119f31a35a5ec0c858886. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHNB2116713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87901266d5ec5b4dbd0d9704b7edf4bf5c177046c2c5e12286d9a28398f00bc9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLCK42409292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816c94f943e39bf9191cbfe41237b29f1f8590180cca0654fb4a09ceeac5492e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLCK42409294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf7231af653b1c8b5b69fe65fe979c927f3a6402fc0cf42c640aab140709f34. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITBHZ1500947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cae9aaf672adf0c85f2062c77f134575e3c8de71cc2105884e46b03ae3c910. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/ITBHZ1500948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4826ec14864e16bc352c85260ed053138fc2961b80255835d6644547a80d31a7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITBHZ1500949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb912028d04f3e651a9246a6364bac963ae992ba9bba470d992ff6b7aa99a441c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITBHZ1500950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46258c117a60a5183d0c742419ba24ea1278234f04be2b2b9e2e3214e61eb7ca. 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/GBJX33720140.
Fruitless - Casey Spillman Fruitless Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e713f2ef3793c1879d1f2318b662c85bb21ebedfcb33735a11a170db1eb98b3. 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/GBJX33720141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7cbbdb5e8d30b649979da943fa382b48a7e83693fecda0c44cfce51f85614c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBJX33720142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48085d5abb1f4979a355594a777e4931aeb21f5bd77a74746a12f56d45f9005a. 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/GBJX33720143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3892b10ba50b8aceef039ed1ab4409fddfd42210eb7221296346546e4e032860. 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/UK6GD2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b439d9b4a697b18bfcaa2d2b98ddcf43c354bf71fa11de4029f2741e89d6f52. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/UK6GD2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a044d28f868b80bd59391d778f2da0b032e0a156a0e92fa622f30a8431c1f5. 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/GBKQU2143794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4fe07d31af15107ea30bc5d636366aecca0b2d0dcd3d6a239bb0f206935fea. 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/GBKQU2143795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfaea4273122d11330909ac8e20050c84df3c536cbf252bf0c82583124eb96e. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/GBKQU2143796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2175ff310a4cfa25eab9996c68f5573375cdf94c48db9b12eb3406bf1c493254. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU2143797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13382e38a633feaa1b360b885529c635a84438e9f4784b05c75aabf6fd030ea2. 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/UK6GD2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3abe4afa5ef7c9247226702d74295c2aa104d7f036ec84cb2684e66f20f613. 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/UK6GD2000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2539a08c4abff593926df57f3bdd1713f2609757c5acb9e7b78300d6bf39134d. 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/UK6GD1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb882069620e481ad896ef54560d8e0b9c44477e8f7bdd6f4ba5efb14577453b1. 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/UK6GD1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a59a382e6d18487a14ba4776a4ead6a7e2d69a2d835f1771faa5e8420df72d4. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/UK6GD1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81f9582fcb1fbc742224c2a1730a6bc128478478514ad786d1969fb42b92496. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/UK6GD1900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e0f481f8bbd8985b72156ed3d92c49c8a32de86d90a434c9f8d2c61806370d. 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/GBKQU1622602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273b7c39b5ea9bbaa96ba1665cb96c77941ffff6c3c35618ea7c1d0dfc9b795a. 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/GBKQU1900314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fa47cbac5e2e326a31c9632c9fc8f0b9cfd64c2a3274d59ac5128cfd2b412b. 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/UK6GD2000102.