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 0x46f577769b33a9b466e206c0c4b732b3f35a9bc95ea628fc723a129b83f82715. 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/c511ae87-e375-4593-ba77-358fd6565fb0.json and https://artists.proofprofile.net/proofs/artist/c511ae87-e375-4593-ba77-358fd6565fb0.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 0x1546db19ceab560545eaf10602f7c6a7c1cde95f009477b22ce4fa57810d0c15. 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/QM6DC2090481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0749466a041c87e6042986941e8e29d5c41894ff153d3ad4ad16a38652488936. 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/QM6DC2090485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e541ee64fb5fab81c81459c88b9ce16b559c10b1b82ff30addfa6323d5e2c23. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM6DC2090486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094415e9fb2ebba4d5494261598fad1755de7a74fc70c8470a600e0addd5c4e1. 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/QM6DC2090487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3aa8a9b2526abfc4dd3314d84da59d147cf3e6c088801ce82b8f0ff71abbf8. 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/FR10S1752475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47322df41cd26c25714ad5a466c4a68d0f146d78762b3aeba17ace46caa7a1d. 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/FR10S1752477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548b9ae382f4bf732e192ab43b2b52ba3312e6fdcf59213f45b38f2fa0151fea. 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/FR10S1752478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d06a2ea6935755fbd6005ac1cff7e764444bfc26f42b5400bdbc5470678331e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:43:05Z), 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/FR10S1752482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a82d52261d2cd1c7f7bcc6bd5477312b77c539673fb1e7d243dc071cc4ee1e. 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/FR10S1752483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb914f01d3e46807644a5fdf7358bdffc95c58885b934822d2ef5e48c00186c. 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/FR2X41670162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf448c1f2cf9104a5769ac90fe5fdb14da250133660dbe36b760805f9ee493fd8. 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/FR2X41670163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b875513d3b27661723df208c78521f50d1d503b16b78c06a662d415d5542e9. 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/FR2X41670164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e5c4aa2cb96c6188733b42e1b731dfce1f1d56e9e37e078ca7c224fcdf0955. 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/FR2X41670171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b94b6c48445eee228c824275380bb125424ecd38cdce697b94099ccab76ada3. 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/FR2X41692163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15936b498e437342ea1afed0d7b324e081b6c515d60caaf6c9ac6ca24da30e6. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:14Z), 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/FR2X41692164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f3bad9149dc8ea2945592877593f6469f32f71a3c06aa730fcd29da1994935. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:33:21Z), 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/FR2X41692166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ebc72f5b7a7c30036a46dc73301faa1a5840c7ffcd832864f49d3012c183e1. 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/FR2X41692168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07979990574d4edff84a109835a1f297a5314ede581570b3d944fc65a0c6fb05. 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/FR2X41692169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa110d54ef9191f85f03ddcdf78693104ca25836584aab217a5fe7ca21451285b. 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/FR2X41692170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0618980ac5ca775af5a5dbabc15c48023a3fe370a72dd89e1809b96c1ce615. 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/FR2X41692171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f2d0d13ac49d2f125599a58523330a6f7d701bf94edc3d47f54f0fc31bd63. 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/FR2X41692172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bcd9e7c5bd4e252c361ca318aac6f69195d710905bc76704edc1e25e0018ff. 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/FR2X41692173.