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 0xab23a767ec4d854d31a77cab4422668aa5e089c1d0642a25caf96b1f81b68169. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29f0a75e-1fb1-4498-9a73-8693011829f8.json and https://artists.proofprofile.net/proofs/artist/29f0a75e-1fb1-4498-9a73-8693011829f8.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 0xfddf93e620fceb859c894ead15c755423d3542d2446b1643a1a5dd400c2c7357. 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/QZNB82280818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77def28e8f306ce2a198dc74957685c5afc12bea0a5fb0e868b9d4ca48ac4464. 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/QZLL92264851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8b0af829b838211a5ce230f5379a309aefeb0013a6e8674dad629a88168d33. 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/QZMEV2143733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084a26b82323ba0bcfa518e34efe2ea3a651d4f076e595190b300939383c8248. 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/QZNMT2145716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298da52a82c6776415bc14a9055ddf3f67a672f9a04acf32ce7183652e89a1aa. 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/QZNMU2193768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bacc843ff3547c84187e0c254f8957fdd87aa2b5151ebc59904daa263ecd67. 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/QZNMV2056863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f610cdd0f8dbb050a55fb6fd6f5739ff30c7aaae3c5a4d1cc3dc475108d24d5. 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/QZMWW2057806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01963f3d36753a3ddb6a5820f9619f451b804fdecc9f99c9bfccbd15baadb2e3. 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/QZL382021981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3195307f63dfd818eeccb5974000944584a23c2996fa4603ce83681472ee15. 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/QZL382021982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a64f651ab2291c1d76929954aa2a35b395383e765cd13f9921d2a84fd33bcae. 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/QZL382021983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a44a968b60dc909b48f622d01773ec7d7b1ed5db590e56d557a2727aa0271e. 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/QZL382022464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22541a0cce34aa3ea850bde8e530377a1d2552545ee18fb46147e2fa51285bae. 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/QZL382022465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50785d5eccaf564f544c3439dda22f0dc996723dcf85992c9f76ce62c4d4b3d0. 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/QZJG52072923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985b75459c11579e35a4d1e94aa8f9261ecfd0b841fb8c6f52dcc14b6cb948b2. 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/QZJG52009940.