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 0x3227307cb7f9ffb7cc7450714f78686ce6e056f40ce1f1e5df61c2f8c24930ba. 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/890f2c28-5ce7-4fa8-b8ce-734346ddba6d.json and https://artists.proofprofile.net/proofs/artist/890f2c28-5ce7-4fa8-b8ce-734346ddba6d.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 0xa782aaeabeada45a4b844666e71b0b9216a89ba86d7ac8a2953acb6fb0415b85. 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/CZA232301316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aaaf97cb631852d6a0aecdb704c68e951da29c8da66a199b7cd4a6a44c06f5. 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/CZA232300658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246ff6ff7a866cedd45674be237e0e89877e413ae3c8f1c4e10ed17ee5f1d918. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CZA232300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1931f6eb3b9d7cf13a22cae21249b50f806a55b1b6fee2e93664e3d3b46d30. 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/CZA232300661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248c4571295299af2e173e7e7208c3d1934bd2acc2d671efc09756d62978388b. 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/CZA232300662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d13247772fa672e9280251c60f1f2d5ffd7dfecd09b8dd0478fef4101403415. 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/CZA232300664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725298eca3599de4251d54772517dcfbbceda86ec655a67804da0ffc15db7183. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232300665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3c1eb0c9db6c1d5a34d62570186736f82dce68c266ec705e8a55e6edc2cad3. 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/CZA232300666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7783c8969d432f0fb52a29330a1fa4b40d7bbdf58f0e49bcc413d93a1a956. 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/CZA232300667.
Všude kudy dem (feat. MC Spyda, Brejchus Pavián, Rook, Batrs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc6fc1c07e1ee5e1ee75b862ba799476a70b7a73e9b1ebddb87d87e7e62df34. 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/CZA232200525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36247653e601d5e140341e451ca9f3666ffa4ebd6d342bf71ccec449d76e5c8. 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/QZK6P2019892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef02aa8bf5cb55181ad0ff47bfbd49168e43a075e89d9f96e69b3a9e54dc30ee. 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/QZES52158430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c4eb331dbfa36bf86ad9f7df6426f206d712bcb35a3146b09168681db357c5. 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/QZK6P2087388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdfdcd6c4b5abc0679692e1bd9c90a7c142c52bb891707bc6a9f466f931d825. 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/QZK6N2052419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cb60b493edaf1361e606dad81facb112bdcb939cbdc0688a555187561b615f. 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/CZA232200773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49017a674c9b99780a5ff02d3543b338526fd630b3113460cf8808ceeda8bf6. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CZA232301324.
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 0xd0c89f098c79e262a58673527a1b8ac76168834f4a2f02599d806b0fe898b106. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CZA232300659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15881c0bc8ea39fb0bc5f30b20a59bcf18d67d783600ad0a44f2ea1a236b3ff5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZA232300663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6418997bfe53f1f12c9f6725317ed5854e2fcfc8267fd939d0fcf51d24394d6b. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/CZA232300668.