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 0x937c702f40130ceded2370678c20bf0190354463ed251c69bfddbb53184879a1. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8251deb4-1938-48fe-a2bf-c6ea0642623a.json and https://artists.proofprofile.net/proofs/artist/8251deb4-1938-48fe-a2bf-c6ea0642623a.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 0x5208c4654b40c0a2cbb719edfbb4e3d34f1940583541f1ff0e1da1e9a76c8f7c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEVPA0601301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9593f7cb704cace6f18ffb058b8fafca8151dfa12fa926573778ade16ffe8af4. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEVPA0500707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d849058792bf428a7c3476f875f5cc07fa4e4068d6342240551754af5dbe40. 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/SEVPA0500710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a224c52ffbb64c62bcf04c1614be55b61da1d4252ce255ef43c9912da670e6. 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/SEVPA5003605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e42ee308ba35b61c9dd3952e4fc962fe696b4a84a4ecaf37bbc69333095b47. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEVPA5002701.
Din kärlek är störst - Kom med din härlighet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe224eb2ecc89ff9c5f5acea2f80e070f87e578e2cc01f76700854e0f6e3110a2. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SEVPA5002702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0b3112e6ee3b0a5f2361cb0660663dba1460fa611466c8d61fea5d2ef02a3b. 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/SEVPA5002703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f2eb60851dde1870f94945f8860062bad5b0c535f14b67eaf7732f21d7b4ef. 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/SEVPA5002704.
Korsets tecken - O det dyra Jesu blod - Det blod som Jesus göt för mej - O segrare från Golgata
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf28f38e3105a294e7075aebbb3b8ecacd9b2cfdb980ffe7c452db2e0e5a2cb3. 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/SEVPA5002705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb7727e5359b1e81d69c88a03c87cc755fb44c6d73617b25bdddd75765d6a3a. 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/SEVPA5002706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ee556a0b8cc85d9c0a8cd71446e5ee95a95fc3802745ed26fbf60ab60f83b6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVPA5002707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494fe1a6cd397ae18c7d7d7943e55bd285eb5e154fbfddfb06cd62843baf8353. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEVPA5002708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344670f25f2da7d087fce9aa154600093b08f619db713e8e26b293a0765272b2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE2HU9900104.