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 0x20de42df1ba96d2e4c995c8756936226b4161bd612e7e8e62810f2119070cc69. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4186840-6c75-4fc8-a7d8-7510f35d0ea4.json and https://artists.proofprofile.net/proofs/artist/c4186840-6c75-4fc8-a7d8-7510f35d0ea4.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 0x908a1175da58090168079b836b82be2a00c9d7d69df2dc58738a3d44208aa421. 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/FRZ170310140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64158d99e6029355e22d48cd5dcceb9b8074c4ed8dec889ce795eb7b573faef0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRZ170310150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427be7062c520b6a38d1e96e6efb4d57e7f601d3d0f4e6f72866caee246bcb57. 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/FRZ170310160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698f481fab81935ed5d629c66abfd4c1a5f9dbb761bc731f5ad4a6c470a9fd5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ170310180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8a248a94ba01252f02cc2499c80fb77f89b4bf6a18efe258964a934a99b4a2. 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/FRZ170310200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a389c3498faab4c403c088b8f968a8e3351090da7a8c86a5d50947f0aad7a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRZ170310240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509dd9a3c596d27dd6de59f6c4a9eabfce448604fa7fda8ebc599f25309e0768. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRZ170310290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b9a56eca7185108486433c050ecdda55cefba83eee7f72a0840b15e54a546c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:31:54Z), 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/FRZ170310210.
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 0x599c5c9d1730587c38c3122b6575902792bae23fe248eb349a10ac3e8b7c9ebe. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FRZ170310170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7b29d25c8581ad3d515affb323a4f7d5c000a521199cc438b80369101d4cd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRZ170310190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9717a4969165e0471dab9c5cbe79e3d48a13b7e902a8b2578c4a804e9b1cbff. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRZ170310220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5760960e05d5a581dfb223528521cd3e34018ac6ba8dc36596c8e51be9c8b8e9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ170310230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee55beed5dc22417f69054fc46cbf9039ef89c9c458c57d269ee90726f17a789. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRZ170310250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e439b17bd3c4e5f5e8bbeb0a23040f26cf8b2b45677abebb0215550ec2f12ab. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRZ170310260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b2be1dbe0c27e320f8bc0da05d64ba047a691c70d2f944d4cb8b33a69ba38e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ170310270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afd02b091ab5643ba16072ad15d7f63e862955405228b45334d29ae3c8a6850. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FRZ170310280.