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 0x8be4d501c96e27cc1da177f3e00587ee350ce41802aa58d2f35db935bd9202bd. 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/5388bca7-5e7b-40d7-982a-498f2bd70ce7.json and https://artists.proofprofile.net/proofs/artist/5388bca7-5e7b-40d7-982a-498f2bd70ce7.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 0xb2767a55cce7b9d9be5c90e4af41a0e07c97db1f71e2ec86b146137961d94384. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA062305352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecf511703ed39ded47f08550531b3b749ea0686ebd7b9fceb6ae6351d264453. 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/TRBGV1700642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23d58ff38154400e4fccbeb9605b3e37300614170bdce7c11740048974fb001. 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/TRBGV1700647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db7d88d391cfc25c3f71dbec5109cde4ba6c334701b5a6a6dd84ed0a1287fe6. 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/TRBGV1700653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc98d7c6dcd70106c94ad9742d585343d20081375ed40105b14a8c45d598e93. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TR9891700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8830fc31b266448637c01f8c410fddc589ba5b50c43d8b7065123dc8b3e66fcd. 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/TR9891700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8455af41a0e329a9590127a1c8a403b92164f93d61b639a1a757686a88af1b1b. 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/TR9891700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde6793079f0f2423eaea39bd6eacd50533c9721f9c431f5a7c02fd1a0724915. 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/TR9891700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b63421e25fd3990a40df7f8c239cb24e017c30cea49b0d985f843f000ae1eaf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TR9891700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc622e06c90b95b8c9f16fe5374a338b60293a60af79ebffa13bb795402a8762b. 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/TR9891700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc5502a59d9a0747ba4a5c93f423333d144d5a290981a0b6e8f787f6d5abee0. 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/TR9891700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c26e64f8505dc0a199e3c429a0c241642b6f701b93a958cc2e7084e679326c. 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/TR9891700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692971a79c52cf513abde5adabd0815ba2c2f1fc348efbc31ab9559e5bda5016. 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/TR3951100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0056025de300df9289b72e0864a9ece9737f6deec2e82d004c51deab6ea2d9. 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/TR3951100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a013cfd4e2c3ce327f5349277cb8c74005a11cf2d5d157e8276d4320ad1a8ff. 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/TR3951100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4c4a4bb8f88d4fd49cbfd8923717dcaacadd295d6622d4734e5ac070c330e7. 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/TR3951100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe3a564489f416410d40e779ca07c38f230bdb3def2ef27409f4f612c3996fe. 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/TR3951100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff37bd648833dbce1f5c099759cbfcdc7264040e64b539c2749e74a112ca7f4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TR3951100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b87d1ac1bf5f840bb60ebaff8812b4dd77546999f9724c04213bf7702ddb226. 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/TR3950800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008a6c7c95b094b183d95f8d8338289dea34059fc63967773c3864a19a942511. 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/TR3950800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342f39ba314898473aff7f944cad64d82e287c846b406540c2c142260bb929c3. 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/TR3950800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17693b42adb6af22af34a2228a3f6121bfe5bba16c1afdd7122f7e10a9bef860. 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/TR3950800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580a63765a7cc17d2ee1b530ae027d406f4ec8ad550f15795a8ff303d2b70833. 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/TR3950800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab55052771097054084c83b4b96232d74501f6b54b69f8f8f66f831a3ce0c208. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRX872424361.