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 0x4cc4d6b92613b775531ab0a1fa1c80e84d57e4eba62882282d13441b900b00cc. 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/b6e2d2f3-b1b0-482b-8b46-7b7e1af9e5a8.json and https://artists.proofprofile.net/proofs/artist/b6e2d2f3-b1b0-482b-8b46-7b7e1af9e5a8.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 0xd296e5b274516d172193d46af16ce49551f8cfd2270ac99f362825dc39eb6688. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFZ32003034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd22988479f04e8bf565ab4a5e1778dc1daf8c2e67e733ce8b82b6d8d9c86ea. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:42Z), 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/QZK6K2187134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6b79ceeed1fe6c8c5394edf7bbeb9afb42ae1c877d28358b168361a05587d9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZFYY2236428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b78bccadd5d06bca3bafa0351a80b722a1bf641ffbc06d885e8d3a272163fce. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFYY2352813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262695df5547b2b534cb7abd7091932173fa6506edc801d08e9d0a764a836b48. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:36:41Z), 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/QZHN82357633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c2f86d63766c5b1477a596f6f17eb81d4d2a10c013e5ba5ab6ddf9a1b59fff. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZNWT2365107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d4b1748518dedda1f7a76766a6ea1357830c34ec10b30942548c7c7129e532. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAY2317570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa91976443428bca56b547a84d840d635c768db4728b50940859fa0b9343d7a2. 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/QZWFJ2384803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48d3712f506e14fe979bce4081631f1ae1ebecc170a4fa3a0fbb40370a7a4bf. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:16:09Z), 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/QZHNB2427872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8e71b04e7785cae0cd77e44b41c05481dee417be21281212de22dcf9d32da. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZK6L2451621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf53d61b7351a634318f889927fc8089fadd99873a387f0ede220ce1d979ff68. 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/QZNWQ2458372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0a5314228ffec19da5805c7d2c1b6d4b90d7e303facdd9e6b733e3647b34ee. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZNWY2474969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03913abfe99a189889e96a463391da810e78ad97ca239a498a53f6577530e42f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB42417705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea81bc824a395a2dd69d7cac0972cc74964025bd8d451a764bb77d6c04081f5. Chain 2 (Bitcoin): anchored in block 957523 (2026-07-11T04:55:40Z), 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/QZWFF2496065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3010a7f7b6dffac7d6cbbec360f435c76e4b18a1e28c81906afa2865ed5848. 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/QZTBF2594506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77547e44244a817fae142fd9a84150136ff0013b6b7d822293edc2407a504f17. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ4J2503048.