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 0x4ba25ab596b63a663336420a0f3374c01b662f380129dbf6a673591bf7b49e3b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2be57e73-feaf-4cd1-92d4-aa1e36de08da.json and https://artists.proofprofile.net/proofs/artist/2be57e73-feaf-4cd1-92d4-aa1e36de08da.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 0x81e7a74a2a038570b473be67b4c3b09a01c634fc7dc4e789bd68616df8ceb1ff. 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/TR8680200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05940819a1993bea01e95b6869af6d9eb898d226083af54f69eab4e2de8d2c09. 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/TR8680200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d38b2e1f9dbce6b868141f87d128cc072f5f789499639599409e22cd679566. 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/TR8680200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252dbd9991dca7687d0de41bb4c956d3d84a3623c0740891276addf81f372eb8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TR8680200298.
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 0x690ea70a44348abafed0469bbde1c7f81099c97e5d98d2847d2d985af28b576d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TR8680200297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e1404a0ad929feca19027ea946a45480fc6933413a630bf4abd5d55d5515b7. 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/TR8680200294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00e5e63d7b597e5d586e472dde3ef98662c38e9686f832938842d46e8bed535. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/TR8680200295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00f5e4b245ed71f22b94123037693c256f3ee8b153c992f7994f68ee674c618. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TR8680200299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2e72b7d17bb5b8c1a5a03e26ec17a3b89b4315dd008ed088b878bd3c638fc9. 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/TR8689900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3977a147e53f27a4b8b27ef2a0ee03d47269105365386e4f3d441e1af3e9d1a8. 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/TR8689900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b77192808cb06fa50da6b4d44c80862d6ee0ee29e02960253f5e56b2076a58. 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/TR8689900117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eb42377c3ee0348eacec00084adefcfd74bf4fd011b1543b3cf85a2a321055. 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/TR8689900119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc020ae6f4574b4747ec49553b78b9673486b2b4feeb1afa3783d3e15f720dec8. 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/TR8689900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee3e872667b8bbed6a896f7505be359f5317f9661792cb52c6b6dd63dc95c3. 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/TR8689900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51abb78e6f3815b51f839674dd9f924c378e29fd2ab9f617165891562a2a7e9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TR8689900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c04f5642429b4e1412a79ee1545b10c778fc0926b4ea527db52f6566c1ff09. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TR8689900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8a0735c96d3677b5228173b7f3b4a5199ae46950faaf3e25481bc4cf657d3b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TR8689900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124dbb588fc666c69bc5fcc89cc1892d688ef08bf1ffc7408b5399d8dfcc81a6. 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/FR2X41868163.