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 0xcf0ef2298f9f8b04767d4bccf4c3bd28cc854e6eaadaf4f058177e1ff6c2ad67. 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/3b87400b-ab78-43c4-8ce2-079e6e61aef5.json and https://artists.proofprofile.net/proofs/artist/3b87400b-ab78-43c4-8ce2-079e6e61aef5.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 0x5d4075fcd567ad9ede8fefff2f957855a294c7171fcca327429275c1f11f679b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/PL06V2321324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fb9b16ecd50c4345a70f1ba04aa9586779161273afc84f34732c95fba8ddf4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:42:40Z), 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/PL90Y2463578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931c2a99c013eaa3cbcb650ad802600adf611bf4be70a741d38b5982fb425eae. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:09Z), 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/PLI365015680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec93e72fda0570820c44d9b75e8266f30bb50284dc91a5b04082e0a2b04200c. 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/PLI369393150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe513f89c2e4334306b7b1b862abea18191a391a554b97b204477a04741c10c21. 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/PLI369393170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d006d0628f0cd38c3cafe8547d90fdcdda1e72b9aa0f89c1c0894f345543e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/PLI369393190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a609919792cce5842eeefa6f1a86f377b8c990dbbb979bbb6fcdae80d60f47. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:23:19Z), 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/PLI369393200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e1eb156cb8818c54a4dd28ec9498d8fc155d37878c0bc282e61967b27968a5. 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/PLI369393210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d71bc0774fd836542f81607db16b4e4fedbe2631f0cc6ffd60d42ee84aeb2b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:37:21Z), 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/PLI369393230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f3b76ca71c18896a59e704c935328b1b8023c4f7b722aca0a33fc6352ad947. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLI369393250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a82bbb70c15148ab50f12776df083f2988d7aa1595e34fad59dc3e605d79d7. 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/PLI364681080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10de095fd19689034f0e4727af72ce1cce76495feddc4ab315eed5743f1d5d04. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/PLI362458920.