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 0xebb507fc74cc37474f3f440e4190bfdfc49255a49578eb7a717e15e6fb19d89b. 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/776e0820-4345-487b-b3ba-2da094d5716d.json and https://artists.proofprofile.net/proofs/artist/776e0820-4345-487b-b3ba-2da094d5716d.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 0x34adc2810e5718845ce2ae4a5342652c45d3452ce764a7d4ecd1a757daa945c6. 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/GBLLH1018401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1263161058f4fcf2062d4f00cb2cbe7aad1a38d8305b2830a470be9f46afb821. 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/GBLLH1018402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0e301636f085241917fd5499a78521e732f15376a4fd69bb8fe47c3051b475. 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/GBLLH1018403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd384b875f2c9de24199b37d6bcf41c4e807ba0c9a91df35682cac15bb44bdef3. 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/GBLLH1018404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90165caffac1ca7c3d3cbed4e528cbee14f844a33f7679c39b17fc475690c8a2. 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/GBLLH1018405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3f02780b4770a3dd534ce6225bc48aabe3b7d87181b50b05f56b19342dc23f. 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/GBLLH1018406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf505d8d8257d0b06387159dfbe95dee9279d0948a1dec4a4793d6ca28fec45. 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/GBLLH1018407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201908f1cf7d6efad7def0b016323d89b52b5bb363e10bac7d13ba2d1fb98582. 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/GBLLH1018408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283a058b32cb73cb3140b8c590978b31584efab9bc5d7b218e7285288f8f784e. 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/GBLLH1018409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21404320658d53eeeae148ee1f142e193df3fd5275572888d9ea359503d8cb60. 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/GBLLH1018410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b62d02a75521e14bccb3a3bffad6f24cb62c7dfa2b8bed0de3840c8b435255. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLLH1018411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd6f65c177da1ac5ded4c18b265d41321a470d55bbcff7e494bd4fcf86dea2f. 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/GBLLH1018412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30e86df2e7086b953c9360ac8c74e67ae4d5f73e559e01afb5798d0cbab9533. 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/GBLLH1018413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1629fa35bf91138b9317e2537396c5f119b6e16575f39b13ff24f9100d530009. 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/GBLLH1018414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadd39a233c59f45f26143d1ec2bd5abb3ad9a404dc1dca7864982a4518d90ad. 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/GBLLH1018415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fff418e0db137b6b2666b4498ea103e0a793181c6a46166e252e8f4e38bf1f7. 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/GBLLH1018416.