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 0x3442dd610bd8d71f02e99592e9018c16b4d8bdd363df232a6e9d7e61251511cf. 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/4ec5aab6-ab45-4d7c-99b9-326b445e5c41.json and https://artists.proofprofile.net/proofs/artist/4ec5aab6-ab45-4d7c-99b9-326b445e5c41.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 0x9d1b02f84e431a3b62ec508354c3e033ac9175682450e3dac7902e8fbe915e00. 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/DEQ021808232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b5b549d8ae1bfb00d49e820ec89e64a9ad455d0c26e5ac94a245e12fb26f8b. 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/DEQ021808233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4c5f7cc406496f0bfaf7ce78be61ffddf3206225b5b495fa41d6d04765dbd2. 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/DEQ021808234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6ef85ff770a03bb94d232bb1ca5d89ae551581d369264c56526399d286beb0. 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/DEQ021808236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d47b6a036c8f359269b4780162b02f85b2f520fd74330e757caba112feb92a. 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/DEQ021808237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9791a3178f37f449ce7ebbbafc41e947382a990419b82de040aee28d2263d158. 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/DEQ021808238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb0f6884e7fd478d0ef5d626f4efe56e00a9283ad0899d4ea650584e3a3ebaa. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:03:56Z), 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/DEQ021808239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75fa590bb4dc69613ae0f8bc3318709146628cada83e72b5a5e8f740471377f. 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/DEQ021808240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977672f0bf0541c67444e3ca945595c92192f8c1ee3ffd6c813d636cc9558827. 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/DEQ021808241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ffeec7d9d6df4111a02dcf3fbedee4abf092ccc0d625fa71c9869735b4a81d. 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/DEQ021808242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbfe5a4de1b3488d0e155b59f0591fa9b93cab80ccaa9671074cf02d038a71e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEQ021808243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6953a31dc142f3120e32d97a9dab6410a60bfe116b02c4feeaa6210c35a8a418. 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/DEQ021808244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210c9ac8e21bf10f920112c4a9ab0de1d7071977b5c2b5be6bfa149bdeb0dcbd. 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/DEQ021808245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cdc9974524a8465533cc979a5c32677d245509203aea7804e07bad98cdac00. 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/DEQ021808246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d825b73873d9d982580c7330fc4ba2e1b907d7d668bfd1e116f665a8d8744f. 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/DEQ021808248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ba9472f037b8dfbadf7a06389e439276aab681f7d56490e78d6d27343cb3e6. 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/DEQ021808249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0764dfa858262301eb8a04c2e43460a78bd8f04e8cc4a8493318492f5dc00cd. 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/DEQ021808250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc7ceb9171e9076fc4497078c71671dd6067b146c869461c455e65088e1c2d7. 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/DEQ021808247.
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