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 0x71572c4fb04f939acb52c3ec980e6f86c417e97a2a5b1a4ee75e87c3faa95850. 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/13b63d24-ea67-48bd-a219-ee266dc2941b.json and https://artists.proofprofile.net/proofs/artist/13b63d24-ea67-48bd-a219-ee266dc2941b.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 0x873ac1f0b45dd63300374454c84512481d4f040ea191ed2747103fab2171d506. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:11Z), 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/US3DF1520245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753d6e40a63c63bf13a9aa2e65f8f4dc01a89508ee26caa73beb8e871b9960c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF1520248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986ae4d44f02b4d3523bc1187311bf5e8ecbde8dfa41ae501313d40de2dd2f44. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US3DF1635001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cdbf1cddf8b6234aa18b25eaf93abe2110d5134b064f9381b17e7b0d696271. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF1635003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834858e59d13548f16f8d816e273f41dd0c1d23966872587ebd4c29630a4d9ce. 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/QMG491902583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c91b6cc9e561022f764cdb6d4f504bf5aadcc702fbab2a2a411abf9963f47ec. 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/QMG492105625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf073a305eb8623d733c1790bc72c98b4566745353d1965c89dca2d9c0d5a1f4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GB8X82274260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc01d3ed06ed44c6fdaf863cb939b660e6465e8ac16b4b69fe42fa1624573ec0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:02Z), 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/USANG2249229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caefe498182a95582dcb3d1788db0bb3f9a93880c30b5269d54546eb03ea515. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/US3DF2294016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f33e50fc8d9e1ff94a72d26b43b7f003170f3e267619294d63a0be6d476842. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM3DF2277613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c6d5c518ade8a2a2605944924044ab83b3303aa2a0c0808aebbef77a3e2767. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USX9P2373639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0dd690be191c2ddf68f543f2fc3262b86cd87e9057da47fbf705a84c912c763. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USX9P2373640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3fd15eead49e65f7a056c25fe2246f64ebd6af3fc4e5ed2e280e736419b98. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMG492404564.