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 0xa32914a5d5dda425e8498c2b92c361c9e74a07c47067a82a4e4edb6cc85dcb97. 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/6d4a8ea9-27ae-4dbc-98c0-2a373dfd164d.json and https://artists.proofprofile.net/proofs/artist/6d4a8ea9-27ae-4dbc-98c0-2a373dfd164d.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 0x8b9a102ce55dc826811edd956d650c85b14788a1fe787eb53058c1a7014a6ecd. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMDA71456235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b56341e2e0033862212224ff70da1e73af2fb6f16e194d847b3c8983a3963b8. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QM6N21585452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413ec2240254608a07334dbb6745a070d9a8169f16fa003d3c1948c9b6c8498c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:34:09Z), 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/QM6N21585453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c3ef0a2e5269db6e96e2f62f3696ff637530af31cd17e59ba2ae694931043d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6N21585455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4575b0ec82e6c909980b4517b0e227df5b5c3fdd6ceab5ded27ca7bcbc3441f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6N21585456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2065a5f545e44eeaddaee6eebc74915e82138b83421a3959e86e25b141e2502f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6N21585457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a154e45422c9b742f522bb6495a31877e9566ff0261634fd62128c01691a35b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QM6N21585458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89960c666187d4f5c470edfbd29cdb0bbfc474f58fc6ab02a95e7189890c2149. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6N21585459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84633a4d3cc1ef4b957c854acdf3549c746082f984cca74ab2da1e25597710f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6N21585460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5f159751f5bea842b925113f1e83917691ef0a4cef1c36dfec755de6c3763c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QM6N21585461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aec6bfbb7318fce064fa37b916b1211dd8bf4aee9a3beec133e0d195200355. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ22D1800119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a6c8b3220341eab8f31767cd90679a81f9cca913f4935c1e671af1751b6601. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ22D1800120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5261dd0536d32dca4ef4af09a58abac96b0250df87212119b4b094b91049a9b9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZ22D1800121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796caf798ce736b511d49fe76b312fcfdebe8a65767945ea975c55f59dc8f25b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ22D1800122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9ef450be9510ce1b2c72868cb1b33345e304489028fd88384f078da4e9485f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZ22D1800123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c457c73bc91d4ffcbe0123e5f43e9773a34039a73d598183cd0c8286e23bae3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZ22D1800124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7426c2b86ad351fd6afe0e20a473ccfdee3260dac54be5f63084c650494246. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ22D2400090.