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 0x8de8f45d3ed9150c46c08e22f27c52c21bee8f21095298f12ad332b2bceb1366. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99fc2ae9-f813-43a7-ab22-10ae6bb029ed.json and https://artists.proofprofile.net/proofs/artist/99fc2ae9-f813-43a7-ab22-10ae6bb029ed.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 0xec68c2bcbf69301b9b1bc73ade6b6a15cf2b6f633307d851700055fa2d5aedf7. 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/ES71G2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c095298bebb6752a74ddfce6a90b5124b7fbfc6ef42ebce86240805256b279. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1633019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85169cb3b5a1a3b07e16d6fde055730d1b6b1d33fa336b5b15ad51ec9f5b2d2b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G1633020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34635dc3b7dc4efb5fbd91b7fd0ec2f41426cd62059f24da625249a98846c6e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G1633021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b7c883d9491b15daa7253f4c227e5f13cba20b9f6278129facda0305bcce88. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G1633022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc61ca14c689ef85cdbba3f4a6150c7477769da7c9c6cd677e3c7c53b58e2f9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES71G1633023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79316edae7ff118393b1d3813231edc4d28574ed6108e309e4e6926c658231. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1633024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0afa0612f7d80ec86a11d18c86c91c849177e4f9f8fc325a16a99797d07995. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1633025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623e2b6f9f3a3dc3b54c306bae9d4ff4456b43126471a13579802aa07dcd0865. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1633026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0ae9ebd5998ef6839cefcafa679bc94b07aabf1f611d5484967635600e228c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G1633028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75bb84ab7e635fc68b651562f3afd1d8b7856165989a3a6b3c4bac0ff4f336f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESAAI0269300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa227ba41b0f7c1aaa018e2bf0c858328079623b808720ffddacb5f90ea77b936. 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/ESAAI0269301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b6a951df4e0ded65052c7dd3688fb29106f8a9982ecf308c04160eb1ffccf9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESAAI0269302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1ffbfc27164557c6d60019f5c8e6c4fedf80deebce69eaa67b08c4dd234325. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESAAI0269303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f32236b195d003ea2f1c204ca158b18ba168ae82ebbe828ebd992f0e9241214. 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/ESAAI0269304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06700f364f2b9f3457a40bb03ab4c2e6a178bcf9418a01aff27d6d1df928231a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESAAI0269307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6682bb0ca6ce4a1daaf9222593d87ac8817e539ae5a1e6f3dc1e49191fa339b8. 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/ESAAI0269309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea753e95f7f0c1da644d2ceebef3c3178e19de15c6e4bc2f902b8411ef4af62. 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/ESAAI0269310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be8bef189ed420b3acb8f3ab0386f402a946925923ccc1c383a57f5ad3c166. 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/ESAAI0254656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc179192b931fc34b353258eb757cfea4c5f947dc5e96a618bcdc77a5d6dbf03e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESAAI0254660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96750663995d394a20354877ed2e4575917237970dbfc1f53405e35b884bdfd0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESAAI0254661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f035d7bd42d046c335924419736ad1426747260712cb45cfdf1c408aba13817. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2321222.