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 0x4cbd9a31473a3ae97d02cf2d65b289e7652372eafedb0ab8289ef7499c9d93de. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e0bd0aa-cfda-4865-b29f-77141dc30461.json and https://artists.proofprofile.net/proofs/artist/2e0bd0aa-cfda-4865-b29f-77141dc30461.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 0x715e462c2d3695e474d6506608c1d3fec27b11069d830c5b96b0f1ee196810e8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QM6N21779788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadae83a7d2226bbc0bc3531ca9deade8b2b60fd4b7238990916b9807502248d. 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/QM6N21779789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217312eeacf969f621438ee50faad8ecfb248d0d381d1e229cdbb0d22f8eaaad. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6N21779790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d5612d467ae4ac4572c16c44aeb211850e04888e0f25a0eabb3b39ba576c0f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:13:35Z), 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/QM6N21779791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56728d89aaef8f2eaa6b79a5fa8e9b0f8717a6eb6d387ce1f45ac87d229338af. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM6N21779792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb774350ebcd8300eeb59dcdefc242d621549edb6398f11efb4f47a8bba1d48c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM6N21779793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d4b3c9bf21105a80d41d5205f591db045d4274783a1140a90561f0eb19460. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:15Z), 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/QM6N21779794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e0d3b29fdb99ed04053d4c0df03f9aacde3ec33f28fffa6ac3d4cccd881511. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:24:33Z), 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/QM6N21779795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02eca298a63a5fb629b89e724b35550fcd3cc311f9482f11e974edb9c0d2ed40. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6N21779797.