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 0x713789b695d7ef81e3b31177ac4f830b3ba480586c8aaa44f5a06f8f076065dc. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f0f7c4b-474e-4f2e-8ad9-008f0d199627.json and https://artists.proofprofile.net/proofs/artist/6f0f7c4b-474e-4f2e-8ad9-008f0d199627.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 0xb80a8acc1262c935e7139fd8270c4019d6cbbf8533a879be73e65251a0eee403. 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/GX89G2368827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48c2a675e5c8ec4cb85cdf92ab059955ebeab7beeeeac1ba48f551e11b3482c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM82350941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5660929ab4fe0c7b21bcdb0622383407bf480888974556221a9d22270eec274. 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/USHM82350942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827a7870bd4967a248db44340a5c7a1472583294470db714cdfc5d0e7db3469c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM82350943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941e9c5a6d43cadbd437be94695e1d5eaa105445b2f07249e0f30b3bc18322a1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USX9P2350405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0929b0ea1a1c115b4f9df2a46f8932588f01fde1a841083d1502f86e857b165. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:48:54Z), 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/USCGJ2485836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd697ae4da07de37ce690933709fba40f3f6298c74dc7ced55d543c96c8be0d08. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM22465350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af41042e6e7da0e6f3ccf0961b605b69aa1f37318d62461c91948e69148e881. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM82593507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4a472e7420657d37bc3bf6ca8f13ee69c3bd3c4c7d25c831590346b5c7e900. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:10:00Z), 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/USHM82593509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f0135081d73d1ddd7f499b72a13c91b6ad4790efd54a028b8cf06656adf171. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USHM82593511.