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 0x593f9c2ece1ead4611b9ba85dbd7e2d2cb22d7eb0389b06eb9dcda7410eea112. 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/190caa63-1c5a-4a20-bf05-8822bfab9cbe.json and https://artists.proofprofile.net/proofs/artist/190caa63-1c5a-4a20-bf05-8822bfab9cbe.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 0x70e3dcbd20a77ecf09cb0c290972b6cd2b4c29a1b517db1a2c7de48083b64c34. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCACE1536872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa164b2f19e8149a45464e3febcbb527eb268bbd705cf0d15d7e614a30c3056b6. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCACE1536882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7acca1f87d97f10942e36bf9eaf09b757ab912c014224d3073e450b262ac242. 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/TCACE1536885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60014504654edc73ff3d021d9f324d30d08bcb92181be41ae7cc62e7decad5d4. 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/TCACE1536887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62e6f6c46f370466029b5f5ea08b639af8c7b5e87332e13f59c7f0ed195914c. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ARYO81800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08dfb69d77957572505c7a2316e9e8aabe9f7be5b23cc3f1ab7141a515d73f6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:15:22Z), 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/ARYO81800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5465c524ce9c93cc71b9b6fabd9f0a21f87effe88a3f6aaf105ffee8ea1433. 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/ARYO81800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e21da4f973c10734d7290a21e33c62c85ed0362ec6c0bc0409ddf1cb22db2e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/ARN4W2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfac02c62f88d37c8b81af186dcd68503790d5a24dc698797c494dcde6d8435. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARN4W2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cc1c55f79884460fb1dc0b0f6203c3a1699d51b18633ede059fe6274e4a983. 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/DGA0L2388093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cc1c55f79884460fb1dc0b0f6203c3a1699d51b18633ede059fe6274e4a983. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0L2388093.