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 0xa8ba037323602b4d2f4996ce8ac5266e14b8cfec7b96d54d6bb231785bda1211. 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/f04bc46c-0244-4693-a324-d3a7111fb7c0.json and https://artists.proofprofile.net/proofs/artist/f04bc46c-0244-4693-a324-d3a7111fb7c0.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 0xf80e8c247fbea00e295a154038fd1f1ab6c1ead0b8be46ac640a1d8d3f239571. 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/NOJ2R2306060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b39150e8a898522538fb7dc4d1b95a66aabb0fd2bafe89cd2c5e57999a7d7e. 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/NOJ2R2306100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98749c66fe3b8f160548c1070e6f7d0028fb1aa92019155a29693912b050a33. 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/QM6N22286921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebfbd982a4b871dd5cbd7570f47a1de68a7e3d7b9c2cbc25c834e83cc533ffc. 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/QM6N22286928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c6d4cae19a945a163a8aaca0e9cf45a4bf5d886f32b4086011d5bf2fb6db28. 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/QM6P42449301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8353a840b1ec6b04547fe35e66eecdfb1ff9ac1515d66a20f8a0d7bf01286e32. 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/QM6P42449302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b73e71d40fdfac8fbf1ffa26d3a0baa900ee66bb57f365cf84a767965b1056e. 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/QM6P42449303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b7b87c23353813460a1735417fd16d21f5fcc65911be72b1f500b268822d9. 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/QM6P42449304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6bc0220e6bddab7f5d005c1ba3e27a414c60bea0a0471b4a2d9aaf08566c17. 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/QM6P42449305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81622c4f15607ea64dbb1db3c49c212420e9fff67ef8cad492cf0809fcca1777. 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/NOJ2R2012020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf60f0dc672d188324284f73103f22290067d38b94f13958c27342ec1c6b288. 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/NOJ2R2012050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb234c49a4fdf9ade9bc50ebd33174d33aced92d1ed9421c2ca0ab11073db3f. 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/NOJ2R2012010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9947c2ef1a784994db061a633c2db7a2e0badc4ca270161fd251eecd32c0ad. 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/NOJ2R2012080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0a61b4eb4bfdc339898f9ed2633560a642cc6843e58b385e3545f57cd7f8e6. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:24:47Z), 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/NOJ2R2012030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc5187b3b20e1f3fa3c2064d96ba907d096caf79578b63d52fcf820fae637d0. 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/NOJ2R2012130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2787eaae8da2f817f3c86f9796a8a2277e6b9495a692fa08f7ba7e0a412000. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOJ2R2012150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a9bd68c2e51ba7ca27ebe66835f9fa51d2ba66a5cf129a41d7d4571c37e71f. 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/NOJ2R2203020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2def0127a5bf820c0f5ed46245a43ea8d826fd9211f9eadf9981227d6377ee. 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/NOJ2R2304060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292c7705c971669a72c311421c18d84dc508108e53a503c8693160fba028165d. 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/NOJ2R2203010.