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 0xd5cbc9a2fba713fc69da2e3672ae5fa7ad54cb1cdc3a6cfe0cd5e6b1dea5d32e. 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/e63ccc85-ba29-4cbd-88f3-d52f1cf823cd.json and https://artists.proofprofile.net/proofs/artist/e63ccc85-ba29-4cbd-88f3-d52f1cf823cd.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 0xa29be3ec27f6a8c904fec2898cdc0e3a9ac89baf5d0acfcfad55eb844e6ee46d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FRX452084581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42819f0526695b6db2057b30b2f9b9d0c81981acbb9ea14cca37fdacdeb44c53. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX452088894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82cfdeacd75caada3d0c7becf47bf95de892f7d90a2b80c7ca969646356fb06. 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/FRX762294211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde549f2a231c2549a74026d45e348aa7aaa8f383f3bfb43a9d3c692cc72c110b. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:23:21Z), 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/DGA0M2305777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103c762648432511bc057385fa64014815885b0e4b71bcddf5d016f995edffea. 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/DGA0M2389933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c18e1b2485ebf905c36ab596214872b18898cf099ca943eda9a54f4246305. Chain 2 (Bitcoin): anchored in block 957535 (2026-07-11T07:11:01Z), 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/DGA0Q2339087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac609541c2c8c39439f2a6b3fbf45a6270871d1a981791b9c689ca7f3c35fef3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42496185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab7ccb03cc39c6eb2863d071efc9f56b00b50cc56150d2fe1bc604977f38d8f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DGA072413617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6faf5e5f67d1419eb6b82945e400b142877e8c624da1965d5b5b035f0516f25. 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/DGA082474326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2533a680d26c63a10584c1a15614c9d3fd99fdb4d65e33c2d6d61b7113085ed8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:12Z), 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/DGA0P2440134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8962d24ce7700795f0000d0ed9657c4d592cfd8d38778d371a4147faa7d746. 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/DGA0R2490295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccdfbf1c974f7c77e2d66b7a710923de76d5bc0a14d4982dc04041d806d7667. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DGA0S2421886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6a4617ff917176fe999b373dd70a49aa697340c6bb0402d26b7e3f81ac3718. 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/FR10S2527672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c6db82d54dc67213803d795bda16bdffa76931fb535d2d204430bbf739ecba. 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/QZTB22557826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16291c0b87982c77b2127475a9ddab3f75c135aca422b66b2d41084b377ccd7a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:29Z), 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/QZTBE2535030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40f2507f1030dedab714c037fc3c2d1fe2609619688092d35134004d3c883e1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:29Z), 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/QZWFR2575240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe331462d9fc38f6fd20c832001ee7bf5683f9e2e54bdaafa2ed9dc84ee35047. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:10:34Z), 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/QZZ7V2531831.