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 0x636a3697470a69d86b29d54163edbdb492cc7c1df1b5337478564232106a00a5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44b1157f-cd06-4cd9-b171-d447f78fd056.json and https://artists.proofprofile.net/proofs/artist/44b1157f-cd06-4cd9-b171-d447f78fd056.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 0x781dae777eb5542a7146cebf4e3506e35d3169dfbf2f3fbbed3e60877a8a3ac7. 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/QZNWU2432905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dec9e4c23edcf664b7b3eed06501230d9855fba8f91f66902bb0dd5e7c2f283. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAX2447478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9202a2a41bc8b906e117bb4f08ec7239de083e4e2a38b807c2f0fd7ad7c38516. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:38Z), 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/QZWFK2460014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd212b3b383e99ed148bf24cd29513b8f54405458874a745b07c90e871ff0a42. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZWFV2447572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e104981b0ddc56aae1d743f694edb66d74751b6b6562158fef245556ef2bbad. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:45:55Z), 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/QZZ792491074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2372fe1b56ccfc6db2d80cd8c2c5cd29b337a851bac690e673283791e70a1dd9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA42549915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd212b3b383e99ed148bf24cd29513b8f54405458874a745b07c90e871ff0a42. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFV2447572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dec9e4c23edcf664b7b3eed06501230d9855fba8f91f66902bb0dd5e7c2f283. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAX2447478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78082453952c05f13b3825a2af118fe472c93c742759a071eb32a7a0f2609311. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN82587297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622aff0439cca3929129286f33137515193791a354b1bf9c77d447d023c39bed. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHN82587299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b7e096921d1b5c467b9ec322d5c1798ea51eb6e02e2cf5c0b891489d6ef5a8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHN82587300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fb184adbe945842422403bb01492576948f47922b61c78333e542353fc5ff3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZWFL2517388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2928696a56cc665d68a81b0a089b168499c44f1b133b2cee732d5abba1a1ca2c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:59Z), 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/QZWFU2508295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088c147cde97dc9642e1ecb12460a9bc3a40debff0b2390d4a93dc022a6d3e13. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7Q2523150.