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 0xa1ada907deb03be1d161c3cbd23cb6f507a69d15c5e8306b1004146d376726e7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fd64946-ae50-40e7-91df-97da035cd3bb.json and https://artists.proofprofile.net/proofs/artist/1fd64946-ae50-40e7-91df-97da035cd3bb.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 0x533911abe96a3b14fafba6b5005c849505eb18ef23e500b0fe8a2a445cd3f77d. 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/QZFZ32022495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07febbda1b44a5cc1d77539bd1c684db3ec2648e7e38c388f8a75f8eb151e2da. 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/QZFZ32022498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889b731ce1e34b541b8bd22629a3d9bc0909fb2323c6612b2614c9a85a75a1c5. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:29:29Z), 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/QZFZ32021900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e7c6d334132a70c26487b460fcfdd0469d77ffc371664d7c79fab8cbe4bb2. 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/QZFZ32021905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba77dd4afbc6e642c75d5066b1de2853cec8fc2508e56045779c5f9c70d0fadc. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZFZ32022481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17b482a2ca1a56d65a75e934e5ee80ad8615cf2abf9316782939324eb670f70. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:52:58Z), 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/QZFZ32095113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad765f911ab71e17a30e4510c3315b4fdbc65f275e1a8378b3abac34d74a9cd3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZFZ22072394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02535f598360f04f9303063be74355c08a5e5eb51b52f07f6352fd08d7426e35. 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/QZFZ22072395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e07685c2dd668c126dab0ce062f17acae47709ab6c1203d270703c33a7c564e. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZFZ22072397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bfcee51e5028a0ed644ce93cbaf216904cf003415b3c50cddb815f14c0d093. 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/QZFZ22072398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf433964f3bffc326094dda90d685a976fd0ce5d349b55b2ade65376b0ab0e91f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:06:02Z), 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/QZFZ22072399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8553eb057760ffc0458e7617f5005511df60503364303053a9093b79fdaf19d5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:36Z), 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/QZFZ22072401.