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 0x4b609f1074d4acecd2fcdbda59cfd1271f306ca26c22602da629425e55ab2f0c. 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/10332268-7730-4939-b71c-3e650873b75a.json and https://artists.proofprofile.net/proofs/artist/10332268-7730-4939-b71c-3e650873b75a.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 0xcbe8437014f991d0a9ec28f9e97dac77900ce44514bb3b126e55ad523abd99a1. 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/NOCVS2102712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64a16ac0d6b9fb9607eebde3164dcf8e03163fcf911c5f60c17cb47dd80ff46. 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/NOCVS2102714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e43c04d4ff0e373796910692fe030e61ed0443a67ecda153d732d24799bfd. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/NOCVS2102715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa700d6d827a97dfc4615e81ae6d9478d2f48d22e67a1febc3f385efbd155a344. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NOCVS2102716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e9eb567636d4e9d286463c178b3a80b19bfdf075b85759f310e5d56c4cbdf4. 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/NOCVS2102717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84138b224952e6a39b9b39181f91b060f0b595c813a37d4441730bc0f65855ad. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:59:44Z), 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/NOCVS2102720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64519c3d7b37c2645f7b06990183f6e51def49e0d8131f4d9aae1117a3495ce5. 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/NOCVS2102721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd859bc80e2751c37aa329976fcc4498d3ab897a8f9e492abe510fdbfcfd2cbea. 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/NOCVS2102724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb58405621aeab5c2441147e6f3cd82da8dc157cc9b1af2a6ac858393e4ad66. 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/NOCVS2102725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dca634c30099da292cd531b0ea85d45ba4d112b4ef344e0a2886664965443d. 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/NOCVS2102734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636483997f5a7ca92fb8fed75dc230504e205e7d5cef561ec50b28c93f12712d. 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/NOCVS2102735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1512608dd15757e41432b9cc8e09d6af6c2a330f073a37fc1cde857aa95405. 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/NOCVS2102738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642bc4d41f9426304de81156d33008e64b902d9f71d1225ed44778d459d8ec06. 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/NOCVS2102742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc26146c547c7b515f08ad24c540f030990d651aa849a246c82323969d2378d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NOCVS2102744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe827e48aa1c94bc42d37e06eb581e64136149d80c31b230557c1cc1fe4b6eaa. 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/NOCVS2102746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6ff993dd90192e95ecd2de2016f4f52b7c74d115b640c95c780c09ca0c8ba7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOCVS2102747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37da757dfc1390b3a4b6e24ac0d6a70c7d5e36d987e41a58adcfea9ab475393e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NOCVS2102750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3506d1b36077de3e0bf26e53d75f1b7fe44fdc86b34ac2e4fcbe16cc667f4ce. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NOCVS2102754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f5dcc5b56b88507ecaebcc58d8f07ea829cdb4190cb75328d101826901e061. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/NOCVS2102757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc1b2c7ac35a8c957d46427cde75a8db016feed123c2e849bf29140bdda9955. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NOCVS2102759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba44d52b35ebc61969675ce62b24b9b68fe77730a101fe713e81823e5953197. 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/NOCVS2102760.