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 0x6850d62c23468335ff37beec5db2e57bedfa77e1f1054b8943a7b4ff6ab0cc35. 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/74413b0a-bf04-4923-9ef5-855bc3148d13.json and https://artists.proofprofile.net/proofs/artist/74413b0a-bf04-4923-9ef5-855bc3148d13.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 0x227449ed775c93535a477a01a1f706488a97a6e947084a0bd958ab9dec4ee47f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZES72170775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff1b8b4fcff7126ec2ebcbf581ef87d1fe282b44942ee1e77b1553dbd9d5016. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES72170776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95623103143e953144acb6aa5fe19a02e30de148a151cc419b873f59f3a58869. 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/QZZ7M2446213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e46e4d863180db69fb93022e51b0a4785b1a651fd86acf66a239b037297485a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZZ7M2440844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95623103143e953144acb6aa5fe19a02e30de148a151cc419b873f59f3a58869. 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/QZZ7M2446213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874e7af22deba19563552f840984a9fa6f43db7cc79c92a021c217f17ec869fe. 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/QZZ7Q2422452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb206942fd8902bea79ddfbbfcc438220e7208486da50634a43121f2bbd3f31. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZZ7N2487609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616d553c98d3840651e2e47e697eb96a1b09a574ba00d9ab0ee547d81a029a1a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7M2485137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd7e7954882ada4c32dbd035749116be6fa33104260406fced32e67f02acf0d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZZ7Q2422455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95623103143e953144acb6aa5fe19a02e30de148a151cc419b873f59f3a58869. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:51:32Z), 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/QZZ7M2446213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578036514fdfd3553c8f5622a9e235c7758180b99449c4a673417b303bf2a4a4. 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/QZZ7Q2422456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc35b3a30978750417576833e3379b27ac33545a11fb85f228baf2589358eac5. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ7Q2422457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb376c14c52b2f5fe283ed014fa75a72e7f5fe693d9d73bf0a55f35fee864ca62. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7Q2422458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdba3bfc331020f1a76305f76f68d6ca5f7b360fd5099fafd9c008192b418609. 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/QZZ7Q2422459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e46e4d863180db69fb93022e51b0a4785b1a651fd86acf66a239b037297485a. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZZ7M2440844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b2cee22c5c2d3b23a98c63613cdecadf173ca0b6196216c6a636ee453e012. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZZ7Q2422461.