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 0xe2f6ac9eed29d3d5c8bc984e9ddbc82339a8d328be67630f62b7779174e9daad. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e869bef-02d2-4606-83b1-563bb3180941.json and https://artists.proofprofile.net/proofs/artist/9e869bef-02d2-4606-83b1-563bb3180941.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 0x44322d5bb69ce0940a915b835029acfb6b91f1e205eef004164d54f93af412ce. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB72518507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10c2a34fb2be89b76121e43e8ffda1b75d7143bb4d19269d4476e852b8ac98a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:40:57Z), 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/QZTB72518508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d046b51ecff48ea546469eaaf81ab8dd570b2e8e2d48465dcc1010f447df84a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB72518509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80807aba21122c455d74cbebc9325be456c30ae99fb0db4e471be17a66f8a38b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:29Z), 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/QZTB72518510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e023b0a8cf957019148c6aa5fdd1e464a9fc97160b830f26dc35cf9a3373dd7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:04Z), 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/QZTB72518511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b31d0801c19d3a58905051a275c9ba4416507a25435a4137a389c219e30e371. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:21:35Z), 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/QZTB72518512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc7422e6284ea786301cf24eeee2780beb964afc3d9954373e69653f935d93f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTB72518513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd42cb92e473ef51b3dc884e9d2b8e7e7036493b70dfc2ad06f52dd9bb04d36. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:59Z), 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/QZTB72518514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212cecc5adfa149019ac1e33c64b0882dae58c91341e4d86560e6f02222d0271. 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/QZTB72518515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40227383fe68a5adad48558b66ac8c703bd60d4b661421a5b527b1438f494e3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:06:10Z), 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/QZTB72518516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b7a150e27f7db7e55af2e2076436e9d48ae0ac236e937e621a523b4168f186. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:16Z), 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/QZTB72518517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd6b48c390f955dc6b2976de892164c89236a04c20df02d61af6a79e991d82c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB72518518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36052ef11db4444e46db1096b10cb71ad2361510df8e3e7f6df7609edfbb92b3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTBA2577059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4bf974a3d7577b3a465e4038a929468f750ddd2ea83f7a4e6305353b812959. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBA2577060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59530aad631d4fe52bed61f577080d6ccd6a026550b01125622e30319d7128cf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:28:54Z), 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/QZTBA2577062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99ddd416389797efe84d53402c81fe4fd0eb594e3fccad66a4055a394592c1e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBA2577064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cdedde890b0b0247b07808fa960047778d64499afee0c3a412abc088475a63. 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/QZTBA2577066.