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 0x8af0f2e4e72ae444733de504dc1e2af408597ffaf8994e1f064b97d591f09475. 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/887d5702-9445-4a9b-840f-52074b7199d1.json and https://artists.proofprofile.net/proofs/artist/887d5702-9445-4a9b-840f-52074b7199d1.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 0xbda7095e66cdf71f5af2e15fcd799dd6be925008687993e186ae0e9065981fdd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:49Z), 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/QZAMM2072383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e6d2c6896c6af1b301d590608ae8dc0b88a3364b031ba38b20e4332ec0415a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZAMM2072386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eba4ad61aedecb4e170bcd670b3e1cde1bdbb46b7d2a5e038d9944a8f13603c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZAMM2101179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9d6ead2ebab7ddeb21c346d2a49f8e8105e62d9891791a1391b3a4129ca522. 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/MNA032300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cda8f653743f7d729eb92897a909fc3caae532e863ce0e0ca29fbdf5738832. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/MNA032200315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa293b55b196c8ce36639fa51d17cd2263721d20125f289ffb30a97fbdd2cb078. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/MNA032300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfc0732e9f401c791a9d56d6106a810bc0478e40c92bb90b587a04489f3048e. 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/MNA032300293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ecaca062bcdd9f94f7f1679edb388b0450cc628653592d16721f3c26b20c62. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MNA032300326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22aaee4f96757abcfafd2df6f6dc5a8a44349ff5cc5577ce3ce4f901bed189a. 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/MNA032400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f096a2033db400cd807b0282f869c22c7fd62cef8ad0a339050a5ef0f4382c3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:24:45Z), 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/MNA032400289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ce736dbc3e03332ba2dc17bbda5d76753025f56b4511b2b811663ccc3c41f1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/MNA032400368.