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 0xcbf7f386526fbf5e6f24b16abea27f8bba9ada45309c008decc9f6de7534c4f6. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9328fc6b-77f8-44ad-90ef-3f96ba5c3f70.json and https://artists.proofprofile.net/proofs/artist/9328fc6b-77f8-44ad-90ef-3f96ba5c3f70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I left the college, because of my friends.
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 0x809a4ce3b986682d1f89c0cdba668e52dae18df9f83167954e0abc139d28e05b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPX2349272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943436c2d87f17106c42690c1c06be460c240d544abd13a5a1ac88b4f1beed89. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/TCJPY2360595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ba4c919d2734438dd8a7226be229c4faec278b931628d40f923c14b5d7fabe. 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/TCJPY2487341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc503c92cd3eb5961d2b5021b7865ef48f4cd7c56bea4065fceed35bdbd8f04fb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:52:20Z), 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/TCJPZ2494623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63d3f12b8ee5518462dadce274b2708d1e4f5160b76a98d25f9c025314540ee. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCJPA2499865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3960b0346bc185af650b1eb09e0635c64dcf26829c0f4b3f84ae975d89f9e679. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCJPA2499867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fb5a10c4054f312b309ef7c0971c16520c2167dc7e565ea3945851313da907. 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/TCJPC2492343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e97d60a9dab8a140645eb37ee814eb6bd81e4da62dbf84efe990d7b567086c8. 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/TCJPD2535801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bbc3e89345a5d6a40b7a6b93e3d415076df1a4b172311759061ff5450b237d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPD2585757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6b61632b9cceaf3ebba3d5efcc5bca59f3011548a119d8286b97cdedbb238b. 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/TCJPE2518632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa778f54897d2be8bde59b9351de1e4b4b3a58ea5a331635a074c52ff41419c67. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPE2518620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9ea4da937be6b089d6b1417e62684d653b10dedc656102e14340fdcf3baa0a. 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/TCJPG2522701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad4d822ce562f730176ddcba14a2a6b921edf9a6764e72fb7052f0cc32ccfcc. 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/TCJPG2538302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98045e75db47c4ca944392c1d56e8bd70900a2b89c40599f5303614184cb079. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:03:05Z), 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/TCJPG2538331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70c568ac73bda2305e307e1ac0d440dc1110e3e60e44284a8be60d64594bbb2. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCJPH2583843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3aa1ab4094ec1945baba7220f1f8a90667b68845ab35b6bb4d5d11dff8a6b2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPH2583837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87294dcbbea909e76ed4feeb1df440f281b6c0ad17fa53d471c1f9b5fc4c9bbe. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:15:06Z), 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/TCJPK2520847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8896178559d2f643c8c3aae11a5d8dc5420ae2ea57addc2cbbbfa47ddb25d8e0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT66J2535929.