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 0x233c0966f0109ef10e11ff34fa9d990e43466d7ab28e47e7a6a06825a4b53b88. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f89209a4-8ddc-4cae-9ad4-31fd3ad86de6.json and https://artists.proofprofile.net/proofs/artist/f89209a4-8ddc-4cae-9ad4-31fd3ad86de6.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 0xa6d62e0529b4c04d36f0fd193ddf90edd47496e14c38fa73fe4c125ffa6859cd. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/BXOYJ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d969df78376e9e5ba2f12694b6a6ae42ef5e38c7d78e348b2a88f0839135ebb. 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/BXOYJ1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b17611c476958ab1724d1b9d8dfa5f048299b568cbae1960c11d93263f42a21. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:03Z), 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/BC0FF2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ea6fe9f1c624bd0f15188e5411c5036aa193fc5e17821cf0853cb4949b3bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXOYJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115daaf53eee306afbd2fdefebffd393a339b8512713fcb24421d0e1641fe215. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXOYJ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c3027b7b961e95814c8f6a9871d57eab45fe3ea2c239f3b0b7e7b4e7822adc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXOYJ2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96548c2840e1888ca92636c1a64f74a8cc33adb78cd51b5a3c9e84b7b7b285. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BXOYJ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e476b748c8c18f0fe3472da415823f0e65073b7a0c68d0325963ce5046e4db. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BXOYJ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0abcb65f78a4f039a9d0f89a410004854139b6d3f1e710189b9ea6c6032fcbd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BXOYJ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8556b222830e01e38e143608a7ac473465fadc0320887f3554d4139ad6295f30. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BXOYJ1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2830a894d59e67f404e545e3d18a1f0a07e85c250671e0576fc71d0bfbfbfa05. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/BXOYJ2500001.