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 0x4154ee13b02537221c150a8d0f35c6c6940518a0b578990fa739de0a2a6019ec. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/932a4b06-d358-431c-a0f4-7efddf53dd35.json and https://artists.proofprofile.net/proofs/artist/932a4b06-d358-431c-a0f4-7efddf53dd35.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 0x618737df18460262ce60340b1c7712d4a02a07163e0485d00c0317bf8588eb41. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:23:46Z), 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/DECM10600709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72185257243d11b6267e4d7c94ef219434f71be41b6672f7467672d719ff3f3b. 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/DEA811700431.
Cool mit mir selbst (feat. VitaliZe & Ela) - Acoustic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32319aebeaa502eed1018fc5d219f1f33746ee356a9cffb2f4bd1c48c53637d3. 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/DEA811700448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368dddf8680091cb1a62f95e8b6d74095f336750ccf733bb85dbda6d3ef4c18. 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/DEA811700432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab1a37524309efb17fec4cac000b1d1e3acd2be096f7bcc3623b307803d2416. 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/DEA811700433.
Cool mit mir selbst (feat. VitaliZe & Ela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848e55be39eb2fe06aca12437ca51b09da6391709fc8321fbd789b3efebf4fbd. 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/DEA811700434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5cf77250ddb99b2e4db999434ece9fa1c60540bcfb5f17915639cacb95d63b. 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/DEA811700451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb4d3236321df1b2f2d3e010e25f036ef4c575eef69c2b8eaf03617537df490. 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/DEA811700435.
Hamma! #10 Remix - W.O.C. x Mustardo On The Beat Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf312fbe9abadc1724f1b7416c98fee5e9334c09fb8d75c3fb513d06bde8fb7. 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/DEA811700467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67595dc6b45231ed2a4aef4856410a09b1e2eda93d33cb2e16a17dcde081102f. 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/DEA811700436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7585c63222dc44040b6dfccefbb419dd368dd0fcb04f5f677fd9332149b8c8. 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/DEA811700437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00943a95eb8f886f29e91acef025bdee58dcc039e7c92341defbe23a7f685b2b. 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/DEA811700438.
Schlager schlägt zurück (feat. Hans Sachs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205fd803e42735bbe3563a522fb3132794efa62072747effa047495f0d063197. 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/DEA811700441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc77b241be61a44fb90c1a7843bb19adbc3c66e7f7b8a83019d1423ca700e754. 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/DEA811700442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4662d08fc630b5cb61f06b6bf8c5a818a41b4afe425fd2751056239c0f57591. 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/DEA811700443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ce3f2e7e3b3cfefd85704cfa6ddaf3bb810fbf59291202848fa46aeefee47b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEA811700444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29de2ba8df78db4f4e421b715eb727335ca5fabfbb0c92d3b9f453389f80dcf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEA811700445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368dddf8680091cb1a62f95e8b6d74095f336750ccf733bb85dbda6d3ef4c18. 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/DEA811700432.