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 0x61f990c530d397ee00b3006bbc8fe56da5b46a132ea6461361d6b50993ce1a2d. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d97f41a7-d291-46ef-bd46-a2ff8c0cd19b.json and https://artists.proofprofile.net/proofs/artist/d97f41a7-d291-46ef-bd46-a2ff8c0cd19b.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 0xb8221e98c221cf02112f3c9ff9d12a1ce5d50f8f66b96fe849d76d5d6e5bf736. 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/QM42K2566675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d21245b523c8b1a2d73e2afa10f0c3453356f0f6f7b181798d49ecd67ef482. 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/QZMHL2582849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9fd8cf96d72c1f6fa2aba2432b4f5ab38b2e12e22fc074d7965e06099b7ba1. 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/QZMHP2509573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9abc1107132de20765ef57d45ca337f529ea0f5b8d260a526a1d04e02cd19a4. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZMHP2581608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7d29b24b106d2b980a5fc8c4f56cca55f778f2e4face8888f56211f759b421. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMHM2578481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d06b0ce7576d1a2e2727a6829b08957c002b06003a9893a576b886813f9f201. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZS632556809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e0838e07e9969db9835b6f57473f788fdebe2d64131ff0fab0d90dd40dc880. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZMHP2522692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ce49a71d4283ecf566796d078c1eaab152bd93417d6b68cce09b14836c16c4. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZMHL2578133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ccb50c19920b4d665b348d69f8ec83bb32914ff78711841ff116d6642f423c. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMHK2556216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6380cfd8607283a92d2011a11631ad0e5dfff12b61d9a2cc344ffc7e416589c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QM42K2543458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634c400f3660e1170f723f0d662d61c1afd195f570d2763ec7b9216f8907d4f9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:04:39Z), 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/QZMHP2517701.