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 0xa9d575f8cf2213664d36e12e43bd1c0c0bc374e84cf755669594514528e3ea7d. 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/fa7c450e-85bf-4fb8-935b-e5188f7eaf07.json and https://artists.proofprofile.net/proofs/artist/fa7c450e-85bf-4fb8-935b-e5188f7eaf07.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 0x3e4fc68c1b6c1920d46b377fc30b6f0ae748c3677c53d772e15d6a7e423d7f3d. 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/QZFZ42538145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72dcf180271e4047cdd0f74e3108ff49db834745434518d09e2559b8437cb37. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:07:31Z), 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/QZFZ42538146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8740f6244c86d72d2bef62756119155ed56d98b5546b2fb1d9b4896090ccbec4. 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/QZFZ42538147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02758e1587f0119aa693ecb848acdadca7aace22390e32ce9634948e00901a9b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:46Z), 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/QZFZ42538148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f1db14800090c31be0e42d961a6d41442e8b5902ae494ac5d0cc5c3b147c2f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:47:39Z), 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/QZFZ42538149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42d1a62bfce7cfc9e6b66f3c8ae63e5a71016e66e54182ebe7a7f8f69e864e7. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZFZ42538150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b197273e9825867ab5daaa3da6623d0ff5b1fdda17add8169e2b573771a641b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZFZ42538151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aee5b2841d94484a5e33c02a0d0acf0cff21d19e6bf273c27cda59761619a13. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:39:52Z), 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/QZFZ42538152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6e08a7e6d7d913ac92e6b242ccccce691d5a4ef3717eb8bca8f54e753f2af1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:33Z), 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/QZFZ42538153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22477b8b5b05c4858912da16dd2a3a112e8a190e4f249b3fcf0cde28180cf4a4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ42538154.