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 0xeace1fa286de00fb19fcb3911ed08efde4f49e59bcd8713b9136a19c381d15af. 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/400e598a-6bf5-4b8d-bba9-8cb853222bdf.json and https://artists.proofprofile.net/proofs/artist/400e598a-6bf5-4b8d-bba9-8cb853222bdf.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 0xaff552c861b627a75f94168d026f418ae25c28779b765e9dc5b82cf4845190a4. 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/FR10S1545074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee56f538c78b0c7f6256131cb2e51087f8bca47f7a79990c41616c0d48a4893. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR10S1545076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb98fa0ab8b0a2260d1ee9242f7b53b0b1d102d94d06a360a7d557625cb85e1a. 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/FR10S1545077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95a1160a04adeba46da59d13a885c2540897561c309a96b5ba583a05a9a1842. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR10S1545078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c527390be4490e6b9eaaaf19ef7e871a35d6517cda380e3ce34280a45469b. 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/FR10S1545079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ee2ec604eea474ea03c6bf72fb110332e69706aade33d7cd46013f50084a28. 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/FR10S1545080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31032ae03b5d69cc7ef0f74ba15140f480ee6c4ecd4b0e34b876a614b7a27d17. 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/FR10S1545081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf0b8a8516ad6bcfd2e57a4ebd85b256b17b989acae898c857757956f8d1681. 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/FR10S1545083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f70e41695e754cec709dbe4bc769e1f90fffc4e661dfe1c58ba66d39f214e5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:32Z), 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/FR10S1664931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a693979c1e3eeb44aa11ed91362ba2fb56d3da8223f82d1ccb09b1a162b4f2d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR59R1853664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a426f5b92119557317061ddc7479ff86f3bad5ecc45c706426215a984614eef. 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/FR59R1853671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d1061444ccb93e4cb3f44568f9f3e150197a9628a281fc8dfad07362774705. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:32:13Z), 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/FR59R1743441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df1b7a0aa56dc220bf9e26ec8e5fef9c516b4827ccf3ff88e1a3a555fa2f7ba. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:21Z), 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/FR96X1913649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3051e7ce96f73ab9d57de3661d0c048d24c8f95633016509521fbdddaf5e6e0. 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/FR10S1906622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110870d100f59baa57e56c65fc27bc217ee4e42e216d63a90c0a71b16120462. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR10S1906615.
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 0xf831f3a266da7416e7b64e3ecbf42d9222ca317a7e9642c3ba8fdfab5898e6eb. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR10S1906625.