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 0x007d3658c019868a20241b63f787a418b31898d767c6c393c6f38154849a91ee. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d2c620f-4329-424e-9a2f-37983c3716da.json and https://artists.proofprofile.net/proofs/artist/0d2c620f-4329-424e-9a2f-37983c3716da.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 0x22ee42238b65ebd7875238b9dbf1150a1d8c16ca171aea330c2822077c1bf6ee. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/SEYOK2306552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4dfc8538aa6dcc7e223cb58fe85474be46d0b6e1a3546435e8943850380532. 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/SEYOK2306553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa939299c2a7f99b4c447cab0ce673221033b868b76b6d6d7631f9e6487d8b09a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SEYOK2306555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefa9b049578166339dd346680e0c721ca2b6b706bfe34f177552827d6878303. 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/SEYOK2306558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b84b01ad0b26185376a1a7b81e2280494450f6f64075d6c53e7a00a4b3f6f4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SEYOK2306559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a264c6921b3310899f43b9f9e24a23feb0e9e7b5f46d7c8727b017d1f508968. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEYOK2330915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc237512717ec0b7c0ba59a3da40856ead57d0d3d895201563e567c0aa211e165. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEYOK2409803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94a0f6061cef80ca3e125fed5d3c27175e252834f104fc434654a249a325b10. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SEYOK2409809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165d3acef4eae70b30fec73f3c74c135ef96b2522b8afe520f5ea73639186eaa. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/SEYOK2409806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78585a2ddaa704fce7c04f130974ebe13e5330d010fc575d469add0b41eeb36. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/SEYOK2419154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a359da810e0e9b36b1aca359d140b077b776b1b2339cef947be503c52f6fa5. 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/SEYOK2421147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1612da4ac4e4fa0ae90f7c69d202c86f78367a2aac64104c4635c5287f19835d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:46Z), 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/SEYOK2423476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24e5dd3295b86a7e3e047764c65d4a20f11664eecfb90b2c5104a8e9c9faf82. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SEYOK2427510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d4f202d0d418f3c2ac5a539632d7b96e9728b6c39fecfff8d894a7759251e3. 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/SEYOK2431551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0436382d1dd5777458b50957934df023be414860ff2e873ba1e53788b37a590b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:07:03Z), 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/SEYOK2504086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981cd9710974d820ce5181831a6e8be210624b5b975050e4a2563ef95074f481. 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/SEYOK2518083.