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 0x404a4ec689822cf6d44d644f9034506d8605399651d7d435f236b62f5cd48c4d. 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/afd5659d-8046-426b-8fea-3a8bbd14c652.json and https://artists.proofprofile.net/proofs/artist/afd5659d-8046-426b-8fea-3a8bbd14c652.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 0x24fed8f963e1e7d7a433880a454e11c6a8c009647ab944643e8bca36e04e975b. 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/UK6822120004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683e62adde62a25709cc55c67fb8772f9bae74372b95f3445539284443c1930c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/UK6822120005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc74b44b9278af5c9e324f254d5ac3d0ffeb666f9338e612dcfeaecbc600a5b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UK6822120006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea12719123f8f3202ecf701e09ce084729e0603cbaa9e4e7b3f7c1d447ded87. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UK6822120013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b13cfbbbec525714032d065dc5473af948490c478d102c5f188d19b54d18dc. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/UK6822120015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc940f63c55258ffc75d40b000d5d26bdfe381d6a5ea3af67a2c6b308b67f582f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/UK6822120019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc786d8e8d6e47541de3e0767e5d8064ea0817137aa3fcc3685c2ff963c50517b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UK6822120022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef093f2e8cd51f6096599f8de8f8390f0a61e5a65772274ca21e617f7d4f8a6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK6822120023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab81c6f7f154ad90f839c6b093e39d3de82f061ed82cf90cc701bebb0b8270a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/UK6822201014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c896b6127d1a55309057f5f4dafcb390e7dafc90d74202fbf5a87b20d0c144. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UK6822201099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09692b240d3766807cfe3a2b6a411c9056333b6d31e9ff04dc6f4ae09b9bbbb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UK6822201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d26a65207a4ba9c1c9ded8ab3a4237ab4418844304ed3fb367dff69317e08c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/UK6822201103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2d292e2a287b9e84135682f0cf222974a0e07c37158d6a8d7763f79138cae1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UK6822201106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00ee91577e41e53881d6300522603733440ffd6ca4dd7c240349ece7ad7fdd9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/PLI369940241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678c038e9ff5a4ea80aa9faf2d11033efd8bce52d1b146194ede30a68879d51c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/UK6822201126.