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 0xb62a86918307567584c95bc03497360ae269afb860f990ae3440ea8b652fe021. 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/b112a30e-42f6-45fb-9fc9-7c696aaa1a8e.json and https://artists.proofprofile.net/proofs/artist/b112a30e-42f6-45fb-9fc9-7c696aaa1a8e.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 0xaf580ece59352dc8c6d12250aab1ac4f1787ecdb4e0d11fc8456ec126423f6fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2196673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab06f4eb74dfb018ede882877d587d77183407e9058fa725b06998c05980cad0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6F2196674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2255f5a63fc0d1ecd533148e596e07b4dab027cba3b1c705a2e4c6a03ce80e75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNA2153397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01eb6625f72ee2f676498f97fc30de1c4fdd1ae628466c8c468261baabb326bf. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZES62235707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f222f177948ed9a20cdd06da32e35380233b039887c1293b3bb70041b0c2a70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM8DB1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f4167a7b148cd3e911bd42eddddea689182b9724729468e2a447d301ca4405. 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/QM8DB1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4881db7635712e928d67f0aff73f62847d035405e1358644864db5f64e2106a4. 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/QM8DB1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612fff6dda1b955b423fb9dfbd32bae03994672d09d1119a8c9f823d132810ae. 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/QM8DB1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2535b0adaf0b16c477142811cf95215dda81e4abd7c311ef04c2ea104b63d69. 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/QM8DB1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cea56f8c3607284d75db25f359e51e0571f5c9faab069b208af862ca2a1e2f1. 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/QM8DB1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6334cb87131d9b9f5c4014ce377090df924baf2350b842d662f529efc69d4617. 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/QM8DB1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c50ec5856297f60239eb2a5faf3e2d54766228946d387f1b9cb3d1e39d1f7fe. 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/QM8DB1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d2df1e865608830a0128a55ea17aef6bf8796c7d6065acdcbf4e1ec885f0c8. 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/QM8DB1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4b6cf6c221514deff94e789a1790b21c67c18ff7185d159c703c20c106eb9c. 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/QM8DB1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6c320506049b2e438570cb25eddeee4b3cb759ae578411620e414326995e1e. 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/QM8DB1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413d1511278e89c8726ef03c1d2629f4ec3652c81006ea96b5823699c2f84328. 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/QM8DB1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ea0e52ebc702d5d523d4f63b8666e465467bea06845b24ef439e0533c61cfe. 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/QM8DB1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7ca115cac989bbe15233b0678caac61bdf7de9166f819563f240c0252856f3. 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/QM8DB1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93866b81326ea8694ef09236f54321a0c6605e3ee909d02d02ebd2dc0a4b6c51. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM8DB1400003.