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 0x72ec2f35a178b018b09ad264cd26a380819166851448376a5a92f57c1f5f0651. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1afd2bcc-313e-429b-9efa-20295f6bcfbd.json and https://artists.proofprofile.net/proofs/artist/1afd2bcc-313e-429b-9efa-20295f6bcfbd.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 0x35152a07943418185d42dd21f8404255f4d488a1fa02aaa4d3c0f478d0dc6407. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/IDA130920501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8442ffe4b992d52cc9c04539a2b75fb2de3a42eba5a1af991671c2acfc84ed1. 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/IDA130920503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a123a42a07b36f2f924c2ed53a6aeef3059788aacb10c8a2fdffe2710e79408. 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/IDA130920505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeefe412cb1d35c6b5c319f6688b6d266b457fe7def8de56f041249d8fb8e3f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IDA130920506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e42fe41f78e05884a7388ab11a3d3b9790d5a5bb827bb9615de6ffaf8fb8d9. 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/IDA130920507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e0c5b431ae58cb80c71bad491ee98e7a0988a5ec50448baeb424a40ee0368a. 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/IDA130920510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ddef6eed7692d1c496a65dd2c52ea382057f283bb20f566b4bc211a8960fbf. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:23:22Z), 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/IDA130920511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651eaa46cef0248317277d89d3a596b42de667c8c7e0c6cea264e2e899550628. 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/IDA130920513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4651ca7fe9fbe09c66d4308e1e4345212e7880484fef428a081869b1b39882. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IDA130920514.