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 0xacc548acec813f0df003026ceee039ee2761f9a8d660a7c93f9c12ef64a2fd3c. 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/2dc1b3f6-c0a4-4b23-82e7-a49f084357f2.json and https://artists.proofprofile.net/proofs/artist/2dc1b3f6-c0a4-4b23-82e7-a49f084357f2.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 0x6934ac8fda829079b42bdbf9a44688e4cd878ac970276f7930c4769c85e460c2. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAEW2035831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9ec489609044bcd47b0948d6ed0e2a1d0334a28ac84a3d856f7e57d3bb22d6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:19:18Z), 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/TCAEY2083678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc790122e708b86ddbcbc1818c32aa8fd499f604dd5a58664f470b8ef0bec048b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFC2043978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ce8037d26410d4479420a29a4a236e4acdf18d23bb1f0b2990341b242bec0b. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/CH7812066514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c821058575743a157ad8134d189016097e20a7b42796a4018b2251e7527f9a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DERK42100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7711e60733a3dfd1262e03fc7d0ea6f20fdd39d81c44ad8199e2810bb86744e. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:28Z), 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/DERK42200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e764b0ab6eb1e39dfe3b02463b681971f5aa480227532f1aaf28b80f29e1a1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DERK42200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe700082016f9387dfb14808971d8445a7cb1d959e8f67d6708ec95e84437d25. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DERK42200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee22394c9f5f8d501c5a45a60a86a917722dd3c4512f85a4c31d9cb44d926146. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGU2341923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef31db4da7a0fd1bb194267e7838e4c133f09fd30e58f8798deb6233563e6ac1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:09Z), 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/TCAHJ2302042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6d20d4c3bf86c9ccbe6f10bed3a931c71e13b8e157ee95b0df95380614a490. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHU2472267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42f456ae92f8140bf42e57b4e796fc531a71f3f11737fa97054059e1e36d925. 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/DEZC62104379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355334ffc293c9f95c72a4beb51084d31ae4167de51a94faec0945b2645b6319. 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/DEZC62101337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116c9c3dd079ba59c05d7e1d9d6da2fdbcd410c84d38dff5f7209d251b32ad8d. 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/DEZC62108972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b53371aa1f7dfbd7e8f806d25b73d56550ceb3167c3b675381332defd68b5c. 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/DEZC62108973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e8ae838a42e38d2504b7346e1e6b3f493f23fccb4e74015ce94d2fc10fbe20. 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/DEZC62108974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7096e61eeed98097375aa21845f9f4cf2d35add4711927e9635e7840d79d63e. 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/DEZC62107296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbcd89922b97a86611e0bd6e8572d5e9e36c10267a469e5ecc2f56a74d5da8b. 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/DEZC62104378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cbac4eaf1d4586ef7a663a021ade2a00c03c4470954f8a2e31114278dc4594. 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/DEZC62108975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc83f5fc717eec676a53870bcebed53eecf53702cedcce89116fb965a80dd4a. 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/DEZC62108976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec31a0b4c94264300a06496198c04fe94e157ed347d0335c897c81e07ea4ae2. 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/DEZC62108977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604781ceb2b860e57f3586b8782019a098c54fd2c6b72887d3c82f3f32eebc1a. 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/DEZC62109821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7096e61eeed98097375aa21845f9f4cf2d35add4711927e9635e7840d79d63e. 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/DEZC62107296.