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 0x2870fd3586f6d3a43a86c76a3e63975b2a0bf38777b6fe0cd79da234e79a1cc4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bd56df2-3cdd-4ea3-891e-6a22118db59e.json and https://artists.proofprofile.net/proofs/artist/8bd56df2-3cdd-4ea3-891e-6a22118db59e.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 0x6e640369c4281bc28b9b9c9a7e8fca6a7b190f5e7e864d5c4550055987afec9a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:30Z), 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/GBSMU1890826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fb0c6b7d07cb1177c546d12c4f44e1572b8b3405efc4e481061c8a25c3dfce. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBSMU1890828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa23f58a8b5d19c81fd506103cb904915af9744e41bfe19658b86893168ae563. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/GBSMU2057165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1be29f83afa68e3e4f08e5f32778dffea9b3db6e8e098d80ef20434e1616507. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/DEE021701200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0676d52dd6aba6c5121aa0c021ac449bea0d0ead081b5c79cd5c0118d7538026. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEE021701220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c778d92c14fd44f812d2e97a1e82332227c55269267b6367652458d61aa1600. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/DEE021701230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aca899191540ed83ac8f8c70b78c5781ac98ceb313995206e79e75bd68eb34. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:04:59Z), 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/DEE021701240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f73729581422751c5d2b7beca8b59b0994dadf84bb051673964aff0c4b3d2a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEE021701250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286636e6b33eff81497d92d0a71039c2e5097931021272a3b97fe0029533decf. 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/DEE021701260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8624877fceaa40d9dd00cce5e289c5ec32e4c0b0c0c31a91ace25863c7b51f3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6L2375190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd648cbe2702bccac18338e3ba30489ef9efdba34b539b0f0af2513c3a6227e. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZK6L2375191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf00ed485fe87494c944bda0e901027dc44d8650ed6fe2332dfd43e9d7d3f6f2. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZK6L2375192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b5444271e642de850129b4a81b2795cae60cc8aac394309d307c4584a4d3f1. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/QZK6L2375193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4da67e16c55134043debba4067a3e45b73f3f9ad759f575a0d80bf79cd5a1f3. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZK6L2375194.