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 0x9d24de67922b9bcb944714c0f8ae82502a01342be4be2716697401bb2cda2734. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1a6f303-cb8f-48b4-9c31-10d9a03e783c.json and https://artists.proofprofile.net/proofs/artist/b1a6f303-cb8f-48b4-9c31-10d9a03e783c.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 0x4c99c5689d2dffc48da1e74c0abb9b19e6c448244e7f838727636c840bcd912a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USACX1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860d9412838b42b1e0e10a0201de4b09baf46427635306687525bbada95220c4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USACX1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd824c87bc637d4360f54045c8df359b017bab4fabc2441989b09f033e2850a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USACX1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50e00e365423837896f3d1df24668a0c7423c9024cc155e20d41eacc13c97e5. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USACX1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d92db4e71dc67ee255c711dd94907f722e2579f452a14d56f79c9567edd69. 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/USACX1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd590b702a95698f8b71693c0850cb258218f47c2f0026c199138584ffc6d67. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:09Z), 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/USACX1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635657043fb62e24bec12cd43df9c23917f5a84f5b451b9ea1c242a41fadc173. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USACX1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef14156777b09baf1e2961299b173d168a29c22150bf594b3a9d18a34e150b51. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USACX1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c493819d6a8aa75ff60451a25fa55c456f0da972e98ec278284822ab6af7a22. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USACX1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7acc07e2b766a535c7ee899cbef1b6ee23fecfdcc6f8bc1f73f3564df1b2cb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USACX1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672547fbea2be4d54585d5367ba01cd32151792a48c1d1bff33903f959fd4226. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USACX1600012.