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 0x6fc46ac14e76e5a2dffb98eea5a7c0b5068a544f2ac28ac5d2e01f933f1b0240. 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/c23677db-baaa-4689-a3ef-dda08c9f7cfe.json and https://artists.proofprofile.net/proofs/artist/c23677db-baaa-4689-a3ef-dda08c9f7cfe.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 0x77d59c9ea3b1e63b7e2f70d2401a34c49a68c50b321f3404c089e1db7c9a888d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:40Z), 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/TCAFY2120845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c82f35126d054c821d761baa35ebe25a8d859f7b5a341b644f678382bb864d. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:32:59Z), 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/NL3WT2000075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d7b49996d6fd9ceb67c8b69aadca42b2df5094b4775c7f4fb466265aa4e785. 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/QZWFR2380755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f804d591e69c9a0757ff26bf15f097ea68ca173e8f3e3de46ae74c77c1bf2e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFR2380756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352438eb9691679d4ddd775b62c14f5f0a4a53acbb1bc51366001a3a4f2162c3. 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/QZWFR2380757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffc9d0cb5a8c95777bfb306c6a5ceec172c61f2efb79ab3e7460f3a3c5c98d1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFR2380758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cdd85b9834247d8ff6700c17d6f19444f3ad187ad60ff2ef0ffd1ff499bfc1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFP52408937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0376141b0fc4ad04ead75d1f7fd23ef7c2945ca6440288dcb5ac33aad4e22f86. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:25:42Z), 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/QZW9M2405447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b1ac44fa5c2b776107547f0bc07949963f7ae94aa056ecdf30558f1ddc5848. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBKQU2583015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd641b9f6d4103d97dfa74003db3aa606d12cc5eea3651cf451ec2fa9d03f887e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBKQU2583016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f66aef6190ed70d28b1eeff8d60d17934e9793d9e128b2cc982ab5219e69a7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLH2L2400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1819c2679cc0c1d7cafa6500ae83dbac16e48f86d92d5423b775f4994a38c68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN92332533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e83557693c470b81453322ebb4cb02fc50c170d238784de8ce7b05e3ac4c8a. 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/QZMEQ2258710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c790f8b8887a485fce883c168ab177710bded3902da6caac1a66efbe3ffac0. 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/DECY52300868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef9c4703eda5c6a79c731fbf0605f78735e0b3a5c334ffd3a841911f4ca3be3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742503593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3a79efd8b721e7dd2d80f51d9be1dbc7bf69fd83e79e3f88aa568776e7523. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZWDE2423015.
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