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 0xa3dbb30b54cedc1c2c074fd37c1a0043c980658ef463f0391c657a91da3d2d27. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ba829fc-8170-4f85-8929-fb976bf5cd07.json and https://artists.proofprofile.net/proofs/artist/7ba829fc-8170-4f85-8929-fb976bf5cd07.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 0x054554c133ddd034b832e62f01a8d6302d1cc7d3d05e61fc563be66bd19afd6a. 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/QM4TX1569742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a05b88a651315aca9d3372cea088260392ed469e0fa46ffbcb729b405e598. 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/QM4TX1569745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6aaf1ba8f59c832b0e5fa92c1882a68fa6113b4379a92c966458b7055784eb. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZ25C1700350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb264d94e203a661115c3c834b627ab1513f66a0caf8486195d66b47584e4e0f5. 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/QZ25C1700354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e7327c7be22d761ae2d634644d9afcee4af71a9f9bbf64d7d75f6a96668ea2. 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/QZ25C1700363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d668c221674b6160ed9f19dc353c1f4021d5d9dbd707d884767ae6de963b76. 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/QZ25C1700391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8537a4a9fae55ab7a859ea04036c9475889203e774b83ace6bb18c9a458ebcad. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZ25C1700309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37af0fabeae23c55b0e5e5faa4cc556f8dcedce5b869b7cb7041ce79b9d0f73a. 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/QZ25C1700221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc1386b2e940c9d7507f07b58a35ecee69ce81e26b9b896cc8290fc5c39df0a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:58:00Z), 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/QZ25C1700330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4e2981f9c838611de2e1bb1bad36d4d54e5ea19696814a675e37c341c461e6. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZ25C1700461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0127752a1a313a131790e366a0da0a353a26e7f8156c975a76cdd286237f7193. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZ25C1700465.