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 0xbfa044f7793578fc4d49488e3a250a6b94dcfa1e9823443697592b32b95deedd. 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/c95bbe65-2af7-4b63-b35b-eadba49e1f9f.json and https://artists.proofprofile.net/proofs/artist/c95bbe65-2af7-4b63-b35b-eadba49e1f9f.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 0x73a6fc488837b84752e58cb7dc3ed843318074dcb80c9107ae548117b6f509bc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWZ2046261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0d1efa0527249f6165d91e7f42c7edc1ec1fbd5b4310deca774b855906d292. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:51Z), 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/QZNWZ2046262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a6a12beb066b3e162299a3ffea40de09e24e3e28c1f01699b7449402fbadb. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDA42321239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b4f96f0dae78eb060de3dae947f50f24ed18dd6f20bc044df137a5de36b3aa. 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/QZDA42321242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d08f2329d216cbde6b680ae88e4c88551fd2e9c2cdd9c772dd9e88a31a9140. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZDA42321240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432df1ecfb98605c16836730725faf466bd5a8be4adf61ba46ad90cf55f9bcce. 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/QZPLR2359427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c173789c5f30eeba485f2423fd4a6057c1710d35d1f246913dd29ae71f558b1. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZTAU2387283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5f9f907534daf3cf0607a7c4eac126dcf45e5f774b72920bf4000e45bf1218. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ22462780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1136f3b69377c9fa6efeea45660f386fe3d6eca61519822db8c6f15e7d348de. 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/QZZ7T2405396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a7b04384638d4d1519544bb1d6c8642cb749515d76e4cbd610c3bad9a622b9. 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/QZDA52500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45437b4ad230ddab4fe45875de6e684d230ec526c418234cecf5315f9b623c46. 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/USYBL2501044.