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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f109c7ad832faf963a3608c1b4ad64eab5e5a1d232a934ee114c753781d252. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4068cf7-5058-4de8-ac67-f908c7eec4a4.json and https://artists.proofprofile.net/proofs/artist/d4068cf7-5058-4de8-ac67-f908c7eec4a4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79397b307826e6d0e4abba29507ef7ca762a2ca1c829a88ade31caa3cf53aed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X2181034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52fa3bfe470c1e6139771a6c84302792a26430d46f420aa2248096093b945ae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X2181035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d56cad7959b591820862927bba6d2184da0b166610a79559ed8afc695c93ff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X2181036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe7c53e64c05df8ce7d5172331aed51878f493bdc2c0a7d60b67c3fb830e4bf. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FR96X2181037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d25179a4bce86c1e6e0d7800c6c661c88f4af0fe00b5d6f2cb6bdc1986183bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2181038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62359412b6cb6a62946d4d164bb29ad2f87f02188e0f7abc7114882df1c39ca7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR96X2181039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf49506c258afe023dbded2084ba1fccfbb3649894da0a6afd20d109f9d2e87. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2181040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe691115d982cd844cf5795e0c3c66e2e9c6f735020a47bfd19fb4e0edf6ee. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FR96X2181041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d7275a29bd8449c2b106bc9cacb44742e52ca72967ae72c4a0c95353223a94. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2181042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5a789374a776bcf4d514c919c336047b424c93c59ce36c3520204caaada51a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR96X2181043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc2608b736940f234a5ee319495284dc7f24e27f9f286be6410562c3068c937. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2181044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8619b957ade58a17ad4e00b3ddc0b0886b15e3672ebd9d39d08b516556b3722. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X2181045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b77a6d2272d8a686e434a80f4ed681659600c36fb797d7e856ee1c28f365d3a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X2101381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fc9ad9a9679cd78b9bd5c7d0df849d09662517b238f9a3223e513bfbf7eaec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWQ2068256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87686a019033c8f78f497affa1d7111cc5b9b283034030aeeaceb55a12a3138f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ8A2493418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4ad4ca9d65b3451b399073a975dc764039efacfdd415920bc587c28c461886. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/BCQKE2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a333480efdb5cced4b36801cea9ec22853c07fa02d83c462d9182df0a0006ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ8B2468523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30fc6404c69b874a3963574c0bc5173f91bac7bb6372144ece29e76ab98c41. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZZ8B2468544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb12c4f284aa7d1ff4c6ff454ffc598238d30ad0b10299aed090353882e9acb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ8B2468546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb322e633a4d2ec0bae46b47adacd7678ec8d3db58f74ac01da96e3e67a3ff845. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ8B2468548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90549745fe987bf5bc76bebb7d0e787666559e8b621559f0df5720c87805b574. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ8B2468559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4246af45596ccce0309bacdc55baa5dd497b7b294fc96e9dcb937fbe2384df. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZZ8B2468564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb54790955caaf19ff6003f04ac655757dd2fdb6a2291385e77276abed32c155. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZZ8B2468565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fa642ab68524bfb306ca002e5d459be344f5049f2e00fdc6bae50358349696. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZHZ62009115.