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 0xb88b7bd57fc2d704e3caa203e9638df13355ed5759d8d587c885e6141fdd9f0b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f9c84fd-1b2c-4a96-bdda-b8c8e71e382a.json and https://artists.proofprofile.net/proofs/artist/0f9c84fd-1b2c-4a96-bdda-b8c8e71e382a.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 0x7d614a66387284ec0a4bdc0a182889dc7af3ce0921e49f26495c7b4db19ba1f4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR2X42462988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9d40928ef9ceebad0871beca43fd813c573539900bfcdd83903ef17da1ccf9. 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/FR2X42462989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5018298c35258c7d1c74439c2b792dacc93b674852ad0f18cae837e89df5c3b. 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/FR2X42462992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934e4ee4568ebde0515580ce6c981aeec6d1a3aef2eafa289d77df26642a0cb2. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:31Z), 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/FR2X42462994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6d372f70459deae3f4a1d5f27da6f3ccd8672050d6052889d2203426afd2a8. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/FR2X42462995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d45d4305a440dad55da0e78d9996bc2ff22fec03853edb022c975c2061f0896. 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/FR2X42462996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bdc85bd80566a6cdb9e8b5e0a2a44c0411ce436f3e18d9f7ae82c143be7d5c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR2X42462998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72c8b53c46510119fd60dc5b99d1b51580bf4791797c69b69032ed93eb97fa3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:17:49Z), 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/FR2X42462999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8c839066a1b3fb90af7919ddab8f06e1e4b7a15bc681a39f3a8fd24fed1fc8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR2X42463000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2780408ce1dd2d3cbee0206c33d0b7c58e286a2cc4a3e4f384d794a00e2b8c8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42463002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b0cf567d7461cd596377aea1c9c2762173a840b8f165f3a92e3e04572725a6. 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/FR2X42463004.