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 0x86261f65855cb2d3ab734f94c44fb7114ae90c9019c80b6fd60fc7eb3f7d1015. 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/1eb77356-f7a9-40fa-95ed-9e6a65a7200e.json and https://artists.proofprofile.net/proofs/artist/1eb77356-f7a9-40fa-95ed-9e6a65a7200e.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 0x20bf6f2b94f70b6de49dae72344223750f8c1139e5b1db517b5304169c5d2457. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/GBMJG2105020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd4133322cc9453f89703809621ff1329de1e86e58c7b6ab5afc755969e6ef9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEZZ52164390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bf6f2b94f70b6de49dae72344223750f8c1139e5b1db517b5304169c5d2457. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBMJG2105020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f457477452af4767854ca114516d93b1a8c4ba16c95f547872c3af64bce50d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DEZZ52164392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f49611b335670112050cb945b8fbf3a82f05e5ee8e4a90e2597d5b06992cef. 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/DEZZ52164393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0a067f1f822d4e3adfda3a9207b128c4b00164eef04c0a57b0bc7e18f0e2b4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEXO72266250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e0c54fafc7bd7d26a66d7003fec25826855415374ba80eafee11576b8132f1. 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/DEXO72266257.
1/2 Cappuccino [Spezial - Chorversion (live)]
1/2 Cappuccino - Spezial - Chorversion (live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189f47354c2be47ed0e129221e0857b0d9ca942bd4ebb4833891b2e6d3f7deb2. 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/DEVU52486616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406b852649103bbe06893dead90661a63d624b58dfabb3203de7a021ca2bd943. 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/DEUE22472083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5270c755e4d13c1cc80371a4227c4454324f1f4a21c20a23b9a0889a668598f. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/DEUE22543689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5270c755e4d13c1cc80371a4227c4454324f1f4a21c20a23b9a0889a668598f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEUE22543689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc11c15fca4dffb375d168d0b71da2ff9bd229a7fd877b7d2f7cc66e9723bf07. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEUE22547502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86153be4ff639238c0188c4ac8706b5961c29e3a037d582e932673fa05617e14. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUE22547504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c4f27824e3eb1abf3d52c23aa4baa2cd74269adc3c18a9be6e180db60e0fee. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEUE22547505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15b488513bd04c4e03a18f765cb13a8d4d7f96fdbeadbf0f87a6a563805ef41. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEXO32218855.