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 0xcc18506f6f08d25d5e2c0c34158fe65f79809c9073e872280ecbd1d90042d746. 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/9b73b243-8f88-4a94-8004-2e3da27617d9.json and https://artists.proofprofile.net/proofs/artist/9b73b243-8f88-4a94-8004-2e3da27617d9.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 0x0a225e0326de7f14ad1b971fb3384dffccec8e4e8b2560820faef4534fcb81d8. 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/QZNWZ2059315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8ba03a7f8e42d85d452f1e5351d8881f6fd45a5d8c08ce5b1bc1d5018e83e4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZNWZ2059317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b426caeabd3405ae01acf7bda8876ba20c6946949031c4c40af10f53eed24e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZNWZ2059318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ee8d19691af119c647c0aa8365d5f34ad40aeae52d79667ab455ac047e65f4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNWZ2059319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d13a4b9a68a38ad26f5374b3aa07587e38cc1b2376f1071228c7663ab2525d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUM72309773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bf9d6e1549727b21e2669fb29035e573fa13054aee5bc5f8efa7f420a7e9cb. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZYKN2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f5b75737fb76dc953c90d22768a143cff81670b9374cd17cf86f8bb0c79dd5. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZYKN2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ea63698d81b05caab7091f3cb0fcdf1d18532f854af30cec3fe2b8cb10834b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZYKN2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed391af17711644d369f5b5413a2b8539502302b26705eb1d1de93f4a9fa383e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USUM72308148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c8f38f503c1121376f1dff2afc6719404e9dc0464c584d8bd923cec247d0f7. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USA2P2449192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa564e7cc2a488d06227cb790efa7740cc48b36c0a3837d8e394c622c2118baae. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZYKN2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b121074ad40279568ad89ec439d23d6f5f3e394aa9f03629aa339d9e384f13. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USUM72306553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d13a4b9a68a38ad26f5374b3aa07587e38cc1b2376f1071228c7663ab2525d. 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/USUM72309773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ea63698d81b05caab7091f3cb0fcdf1d18532f854af30cec3fe2b8cb10834b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZYKN2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767c8e68a7662615c085bc898437f1ee1e960d46b2fa5d353bf0108b170bf766. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2457524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87397a982673020b761a2800074941da4199db44214dd5fc10f7b3cc74a5e1b4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P2457525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bf9d6e1549727b21e2669fb29035e573fa13054aee5bc5f8efa7f420a7e9cb. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZYKN2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f5b75737fb76dc953c90d22768a143cff81670b9374cd17cf86f8bb0c79dd5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZYKN2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c215546be535c1afb798581972dd1be6ee1c273c11d2f5c5ebf9a21f6413cc. 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/USA2P2457538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef9c4238d4ba52d3af792840cae00c12ef64126f5c1f9bc152971b32481bf01. 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/USA2P2457539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5000061bc4ba27fca1af3b8358997407e3ed3fb53ccdb6209a24d615320465bd. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA2P2437187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed391af17711644d369f5b5413a2b8539502302b26705eb1d1de93f4a9fa383e. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/USUM72308148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26148e6570c25f492c13774beacc326a6afbc4332e57497fa96f4a9b31433aa5. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USA2P2457541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d4d525783a11617d97e552302bc14e1b68b3bb56d62307ad969b3dff7b7317. 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/QZR8K2442001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe964ed95f767433e304427917b189c114b3ae1a7529c6de8b9dbfe1616d05e5b. 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/QZR8K2442002.