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 0xb42c5d712a1f0645bc2814aee5b05b1017f761251e50ee4d7c6a1223ad5e3040. 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/7e5145eb-c338-4984-95f8-205d1d8ef71f.json and https://artists.proofprofile.net/proofs/artist/7e5145eb-c338-4984-95f8-205d1d8ef71f.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 0x412da23f2b136966131d114ef75a3937b1435fd9853c527cc25cd45939ae8d92. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/PLA552000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdeb80446da756a4397cc87673f410529c64ee640118a745cc6251d3c45d64d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLA552000256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ea76a1f0065511443bab8276e011fd5d4f771aae9e6d80b29cd56dad515d60. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/PLA552200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33d77e45bf1024e48569782094a0241c1ab9e4bf3533717155ed477f001e2cb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLA552200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b7667d67fbad8329d07d4e07c2c50f55a4c7664f0bd10c2c098bb9ad3e315b. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/PLA552200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacc116c2fc3007d5521e0ed686862bf72cdb7cd5d4e6f32a52d045c0efcdc48. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLA552300595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42a1e524d06c57395781ecc767c81a808dbe02e59e0e46707f8a53675c4e1b6. 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/PLA552300726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b502aa21030e71276afe97fc8175c45960e659d2c91c4d572be0084f8c5d9. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/PLA552500179.
Więcej (feat. donGURALesko, Shellerini, Vae Vistic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b5d85acf676e55b2e520b384d5e4f5906a0bf3682bc7b8cea8531b2bcfaac9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLH181800606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152a168d3747e149c172b69b1cdd4fc926e658978a4153a3f9a0e3ee458d458. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PL86E2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152a168d3747e149c172b69b1cdd4fc926e658978a4153a3f9a0e3ee458d458. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PL86E2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86327e694e34f10df9177e22dbf5d1644149d9ed676b6ac6e9f1b82a40e4489. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLV402401824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26058865a4a41ecf90c88ad2198cfe8cd74d0148c683e3d6e39d7c3f2441b2ba. 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/PLI292400832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70746b4682b17a35f407eb3a39443e4b27374ff044b20855b6c3612acbe7b5d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLC062444659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b3ef12d4449cc1d3f641fa5fcaccae927404972ed420cbb5e762fe09fb14f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLI364005630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6206090e7a5e0c0a3c70d0ed28fabb0824161616747411911067258784b168de. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLB382400855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fba136ea615593e7c2abcaf15c7703ce99c28a9a957f9824f60a3748056f82. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/PLA552100251.