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 0x02e81d2a65dacd5b5acecb6d92736582d11149809ce691e9f93401c11d6b79df. Chain 2 (Bitcoin): anchored in block 953911 (2026-06-16T08:03:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18134164-554c-4dd8-80b1-1d2e814fa31e.json and https://artists.proofprofile.net/proofs/artist/18134164-554c-4dd8-80b1-1d2e814fa31e.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 0x3d44d1c0a4f9dc09c64e577913ae5813d12ae7c5da4293c235f9ebf357c6cdd8. 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/ATF069400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5524e1980fa84dfbc5662c3c7f88b70ea226ca0b4cce0e6b1910b5d202063cf8. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ATF069400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d5dc901ca89fb8ec83f146dbc5c15d317da412f1c0e6527a70419ddc8301c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ATF069400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4408d82cac9afafb6e70baafcd4cfd38a8d8f8ecce77ac8071c6d5c9cabfcdf6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583505be488cf837857662b4218e790ef530a6643ce8620bb9c51a2f9c3c394e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f7175e0118c2d91083e040df9311e239ac2f835cdfe43fe18bd75d6bed8c2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ATF069400360.
2. Gespräch der Knechte, Fortsetzung - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a82a1381dc0222babf2c4678f3e611b633866949cd8beda92639d53f60b5f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a16a01c7de279fcd3eb296b2b0222f1fdb3bfbc0e629db66e25d0f8a4a2378. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ATF069400380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52abb856c2826a47434fb277e4a003b27559daabc182f1af030f29219b85915. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc331196e9d1e0b68c02669d28f17aac6e55694e78edef3a1d5d4f461accd8d48. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5333dd32521946097c14f05ce1f1609a028c94e22b601bb3b0aaf46d602528b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ATF069400420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7eef60dadd763b90e95a47f08cc5e4629cb5d0237e58e92eda1e78e116cfa3. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ATF069400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca79a9979e9a6839f348e889af6d134c000c2fdc0ea030996a3164b2efc4dce. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ATF069400450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe92c15ae49c8dc680dd875e1fdf25ff711faa3b1e2418fb122771652c5fc850. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATF069400460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31346b00af59938e360be68d944843807f6ae72e807e7616b5bac4ea3c2b3e7d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55900a54e9f06ff4e5389181ba7e1d2ee22938fb748d7ce4398b66198741ceb1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8f20e4165353682236b82bb1594e99b3be31eef8ab253b15fbf91fc92a4521. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136af308176759a902c606e688e267bb873cd222d17aab44fc99b3b46c4afd55. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ATF069400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1177fda6b1edaa0e49110dfd7028094511a0c2a6323b1ee0bfe4861cf99de4a9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATF069400550.