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 0x963fdfca1f629bdf1f3dde2fdf204a90901cfab5b87169071be5675e45be0c9c. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a7f9b48-67bf-498b-baaf-78333c1f28f5.json and https://artists.proofprofile.net/proofs/artist/1a7f9b48-67bf-498b-baaf-78333c1f28f5.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 0xef7ab602bf1b9c98d8ee89f6a2aaf1db436d64c16db3b672618af20ff99b0386. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBRKQ2482245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d77018f338e2ada76ccfaeeade77fec7d39d03ad73a5b44c3099043aeddb1a. 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/GBRKQ2482246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe974bb20f59656e2991e4d982a7f87d65bd82f9d46a9fe6391bd7e6e78b27ce9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:40:51Z), 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/GBRKQ2482255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030955eace8038ad9ca963d60e8e1192c052d8599639178dbe8ba1675025cbbf. 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/GBRKQ2482214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22a0f50773a227ab4601c198f36ef0522096d58f957b5d73b61992ba522fa64. 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/GBRKQ2482216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea774100d1b482edcc24668daa1eea25c8c28ef57207e8585e70387a32a8c04. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBRKQ2482217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e3b5d31db3f5ac5ff6869c7e9473bfd49ec3c0ae17c2ea0d577c17ad0259af. 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/GBRKQ2482218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfed78dd963e1007a84e3c2fb947e1f32b30f41e451b72d7862bfebefc67be0b. 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/GBRKQ2482220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171eca7395a3a564829d49b57b8689dbf53fd784fece6c12489812dc61665529. 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/GBRKQ2482223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df6cdadb442695e08a61c2e37a2ccef0449a5afd6f8f4c6dc6f2b6c2a39225. 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/GBRKQ2482224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925712a5216032a930d2f2691c1a478c65fca0b74a6be9fe7a0f1f0c61fd2049. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBRKQ2482225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898500e50cda1c690163f502ca2d561f1aac34bd6de0721c5a1c8b45d7da52f9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/GBRKQ2482226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302fabaf9144a7929ec04293cc9565f3d342b1f5bab05d420452ee52d73d0d1a. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GBWUL2407553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4315f33a9194a32830b55931a6310d360103ff90086e0f5f457e7c9dd47b445. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBWUL2407556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8988d54d5424f57f1a8c7ed8a6bbd838feaa14e8a4e2d33e9618ea4f5544f40f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBWUL2407557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07e3ec939b474e063d8b595999e0c19845f4f32b68aca1a63b055e8c895b113. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GBWUL2407560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d3c41172b62326110cfd332e7de311f8c1c1ccad486a36d333d7becb69ce3f. 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/GBWUL2407562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa350387235daee6c995c600de4c9036cd5a52a46090f196dab62a6d70f453836. 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/GBWUL2407563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263ad234728d984f21412cdf8ae7bd7c11e39ddd5f4237cd03ef1c69c6465da3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:48:11Z), 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/GBWUL2407565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c798125a51cff8c61becca82aaa33edb580a3de5dc5e87364c2a0d0c26ef31d. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:59:36Z), 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/GBWUL2407566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94ca0d9404a83bf47511b2abddabbb893b8297b56b564c2526b0280c8299320. 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/GBWUL2407570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470a617a5ef6781cc494404d4601f0972eabe3e4ec33c9ba8b64e046beddd081. 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/GBWUL2407572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14bfdb6941172eb7f066d5845fa6263dda80b713a36e89523386804115c8fc4. 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/GBWUL2407575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46564a4e2fa787b30dacb3e42fe87b402b2d9bfe87538d70427f96876cacce7. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/GBWUL2407579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef58bd63ff118e13ce01246e5e0625db3f17d6996777a1c60ba53e666bdec40. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBWUL2407582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28226d98b16ce89a22c1ef144a67be3030e4588a021297d14a0ba373ec509c3. 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/GBWUL2407585.