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 0x41c807a6b3bde289779cf783f73f772487e4ea357f4e19efab322d3ccfc7e7b4. 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/185fff84-3e86-4810-9c6c-416629cc249c.json and https://artists.proofprofile.net/proofs/artist/185fff84-3e86-4810-9c6c-416629cc249c.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 0xf8e8badb7154e41b94bc1166e5d1fef8d7d911d757b0b65f5d2f50ad21615675. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPZ921107772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7e7f3f7211d56de4dd282ee3a1bd17007131145f1184da002c1370289775ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPZ921107773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec531ed344e6acc780fb4f3a7ba2e48d3a85850dd740a9da120287370c69902b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPZ921213484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e75d1ea285c69d7fb991234cc47f736cd631e7dbe889fe9ffd353b16a35404. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPZ921307913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2877d7a264e893edb8754d64275dd66d693089ed6d0fdc94e906810fd687ebe4. 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/JPZ921307915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38367bef7bf26cb7213bb395f3196931d769fb4710490a272d18a5f53ebbf60c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/JPZ921401459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe528de15da80724f9a66d9084c00decb5f9e22ec131145c21063de595fba8f0e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:38:58Z), 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/JPPO01903243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe528de15da80724f9a66d9084c00decb5f9e22ec131145c21063de595fba8f0e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:10:42Z), 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/JPPO01903243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1309045c0787553a46c63eec9a59566aacf203384388d0fc507623fc007641d8. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/JPPO01904227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8211234b0c2581d1231b55ed2ff24c78065850d7d9a6ac69bea0dd32c86276e. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/JPPO01504276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd36fd44540c714abce520a478a4d27c03842ae34620d399a5b00f3672a84a8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:19Z), 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/JPPO01509781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e8badb7154e41b94bc1166e5d1fef8d7d911d757b0b65f5d2f50ad21615675. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPZ921107772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717558e53e3eebffc02771894bf3f8268044c94c3362f57d6d2596d0cdda86b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPPO01623279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc64c462cc59c854e37ac1a842b0d9cf0343a3c912dad016426d690cbc4b54cc. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USA2P2463098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a0af182af2ad27bd5f05c795368f2b928e14f57a0a50ed4ac9bc2d187c7e6d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:52:07Z), 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/USA2P2463099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7074a9b3ab5bd74105b199106d18ef072a0d800c42673b627647120d8c91c6ab. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USA2P2348056.