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 0x8064e632266188730413afab48a7f6ccc43dc55b5e0fe28cc77829171abcca85. 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/cdffffc2-552a-49b9-92f8-ad4dc155dc66.json and https://artists.proofprofile.net/proofs/artist/cdffffc2-552a-49b9-92f8-ad4dc155dc66.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 0x5507ed888aa93c8c9052cb76a221e3a31b8dd6855b0b9eb1cc9d4ae30a50061f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GX4R52110996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2971e11cf69a62b715361d38b3cf1fd2fa31db27f84b5a7f88982d3bf27712bd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:26:37Z), 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/GX3HH2287669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab897acccf5bd046dc88634d8e18eafa1fbc0ff979ed182c464f9dde615e431. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GX4R52262749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566c92fb9e3babfed92ca990dd05b59715d2001513d3a5a19d0682dfc1e9b252. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFYY2353191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92c62cac94bc831d35f991272ea85a7782e1ffea72b8d9b8bfb69dea785127d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZFYY2353195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6b0b1998eede8e1eae414950503de15f46e58c7d94821449e0c7becc16e09d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFYY2353199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f167a17ae8975a759714f05b1d832ede2feeaa2fc880d2a589d2eb13a57d3a3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZFYY2353200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5120f279969eb0e3dd72ea3a35cc332e0a065bfbb75bd156dbb7ec90a4d476b8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6J2324006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f23746ccca04c1a7a5f40e71373b21f29ebd7e3f62e46e6738f99ce7115c08. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZK6J2324008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f760ad2a8619bfa129f89374ce7a01fe8237e8a413433ef553d0bad4c91589. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:31:18Z), 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/QZK6J2324011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2037d889a6d9b732e1e4855d9a5ca1988a995995142c1cb23086a4ba8c290736. 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/QZK6J2324016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78354ec0ed138845aa3997a844e0c04a8a051eb7e92bf05426759a90c9bdb13a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFS2412133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cb8c34f8595a05f1925fc66661bbe0e7ae9529a1e762f3c66c40ff6e8d1ba0. 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/QZWFS2412134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d77a4b07103d21cd7ac5950c763a6eaabe4dd5d438df41533780e3748c61b9. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:56:34Z), 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/QZWFS2412136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cb6c87c673aec1875475267399bde4d75ad9482113ea9e9ff423bfb13421b9. 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/QZTAW2582830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cc74d513140feba9691890515a409af6cd130ae43f0a2a85dac6d0633f8647. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTAW2582832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08ca9c4b08f2124d3e3d21526226f5865c93bc4659f216d1f1a4102d5043858. 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/QZTAW2582833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9480331765a26a5fcf5161e32d89f48fe00fb60d6d41c610270064529e4ab1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAW2582834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9771569b7b2a605ea74919eb7087d45dc3a06ea7cc0f859372c8f69751e548e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAW2582835.