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 0x3e316bef59ad5d0d0f0c34fb9b1851be04526c7d060a29060ab516e75f8ddd8c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b28c13c-e550-4d10-a07f-d67b585a7b46.json and https://artists.proofprofile.net/proofs/artist/3b28c13c-e550-4d10-a07f-d67b585a7b46.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 0x524598c3337234bef079c64257aface95a62df1e11f1505c65e50ca6ed813f4c. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMHM2362123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f93c2ad7f275e6dc1cd97735c9183ed552c3087b80bb853fac42adc49b4738. 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/QZMHK2344874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930f66936199de65b436b4cc87b79a5f769a9ed41945ece9a1c7b7931a39798b. 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/QM42K2389956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fff77c3811ef0366700f3e0ca2a59da3ee9740e88f31653992bfaaca5539582. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM42K2408824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0a0f73d2e59cdfcb2922e64f5f372e5c776c11f4f013c92b8f301acdf31ba2. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:40:37Z), 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/QZS662412754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf38bbb2a479e84e852602486e283ae99529d63645709a684cd98003e33a98aa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM42K2433420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5216294115408f2f1645e82707c9a2cc4c5fdc74284674d8cc0429d3c2238d2. 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/QZRP52464939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff48f6987b1aabee01741e5de93f9a78073c976be7cc580932ba520cf698dfbc. 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/QZWFM2422552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf1e4a9b79bb14d0afa220cc07aaa5f0d53f0e7e92e1516f037a7f1cf5971d. 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/QZWFV2424239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3401dac0337979ed1280f64bef6f4879849b0dd62ed165c96022b7f2274bbbae. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7R2429963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11031a45bf6d38ac5475204e0b7aa743f595bdb1c7a22149181b72368649c7aa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA42511231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2743d6f09664a7ee84f04246c98b954106c2cfa33813112b986a3c5a8e45395c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6N2512777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e757a648b3a3decad67ba4c92566439d7197a62576cee968c5dd27709e06cf. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:23:19Z), 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/QZMEQ2538167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d740f5f830e9af05c77f47d65df5314f694b55c46621c7e391f26c142e066b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTB72589323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a46f40d075f535334c985a1f73b8ab46650c51f67176c933c0d1fd0ae56f07. 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/TCAJD2594664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc640d0579f21b990de5241003b91a9f37dff21a87c22b7513cd3e5acbaf1910. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZS642365987.
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