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 0xc029b7bf0af414e9c182fdb1e3cd0d4549254a2effd652b782fdc6c5a37dd580. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b7d252b-3dd3-418f-beaa-b9cd9a91ce65.json and https://artists.proofprofile.net/proofs/artist/9b7d252b-3dd3-418f-beaa-b9cd9a91ce65.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 0x72252b522473427a776753832bbbfadaa3f91ec37e6e3c7fd41dca13c2b600c9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USMH92344852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e36600ebaa3f4cdc5c279a3baab8f2599d215893084ed367c5fb4605310498f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:02Z), 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/USMH92344853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b119e4ab3d6d027b34ae53c0c7cd886b8f03d1ec6aacbf540a7f8db97e4e05f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USMH92344854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7306e4b2da6b0b0c220634920fac417c51525c7aacd0fcfe14a574b1fcc5e0e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:01:27Z), 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/QZMHP2498194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703e4b3a08f9cdb46fefdb7bf93101210a9fb121b9d0140f6a6203348be84dfe. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:09:13Z), 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/QZMHK2482523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bd241086872a49f62bff3e83a47cf851abd3e4273778191a2657d1655d0fde. 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/QZMHK2462798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c2e95dae487935a30695cc48da09fadfa98fe94657d260ca0cd7efb129d260. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZMHP2469847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacbc1cb61b27b8b7d79c9646d31df820b922e599a0a6d131ebf2152c1be2ac6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZS642457828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deca10b456f6b272a052aff5426d067d25263fa1752cb098521d2f243e84425. 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/QZS632487838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6434a062df57f15c54085027d34698bf8fb75eee14f3151bf19358735e1797. 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/QZS642415471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275a2ff27806bc86c81a43a0f8d0522a78bf2f66fdae246a10352be956c3a34d. 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/QZMHP2498691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ef9add7d01283c0b65ffdc331a25a66cf95152f5cd0c8c358261f5b5794484. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZS632494984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829a650c2aa62df4782e1af5151dc8f2b4151c336c40b616f1cfc99a802f4d1e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMHK2430586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e850cdd26a02199ded55215d020d1a9259bdfa15605dc747211639e075f2ed. 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/QM42K2428342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d0c5b6273cdf410f37a1562608b48bb6fd118e56f71a996dfa0f08a91135fc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZS632465102.