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 0xe0b2a8e2f0e576588fce20e38972fac501b64faf6e8a73d030fd1917526769d3. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/525d9ee5-1965-4a2c-aa63-bed1be04716c.json and https://artists.proofprofile.net/proofs/artist/525d9ee5-1965-4a2c-aa63-bed1be04716c.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 0x5795a7b5a1280d5fceeda55c7f64a6fe74a9d8a7d8aa66c170aa8703add61a0c. 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/QZMZ92035219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7984662bff5f9dd0cdb461967d01a67db424650409f00e62b2c831aa8dee5c2e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCADW1860619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c00d937061c06f05be232febeefe2461e0e2ca1a86b65d2e81723ac5284d3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/MXB971900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506336e72364ff6aee034e8ed4cf21398de64a14dca434bc8f3bb1bb2dac2d6c. 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/QZHZ31922662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452d77d7a90ae4b338ca84d48a151fba88ebd187a5c6f5e430e4bfe3285303a0. 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/QZHZ51938630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64c3f71821a2a9e75d7e1b7952a707b9b2682c839be445e8c22985bbd7cb52e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ62089988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4751a4a8ae473483d2a22acb1b13eebeea567761a7f4646bb49e8aaf798faff. 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/QZMZ92035221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc93d3039426f57e8c97bd926411622e5f0dcefcdbb7428891235f27d1c31caa. 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/US7VG2491124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef77f05bd4cf11d89a2aa34e19221d3f42a365100c759ca2e60951eaded98a37. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZW9L2324885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f54bccd05a3dc0ee3cdda77d88971c74af6dbbb2ba0ed1450200c3e9ab19c6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJY2348978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e9fdd06f5426163d5356ba78dd4e973e917867cd1cda1792eced51ff72eb7d. 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/QZHZ32160730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718274145e822b3415356993801cc96eaf4d3ea213af83c3edf937aa246a18ce. 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/QZNJV2020241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452d77d7a90ae4b338ca84d48a151fba88ebd187a5c6f5e430e4bfe3285303a0. 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/QZHZ51938630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506336e72364ff6aee034e8ed4cf21398de64a14dca434bc8f3bb1bb2dac2d6c. 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/QZHZ31922662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c00d937061c06f05be232febeefe2461e0e2ca1a86b65d2e81723ac5284d3. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/MXB971900006.