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 0x1c3cc80bdc9de1c955efb0c9dc81bf853419d362b7a1f653f659170dd36980e3. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/756c7941-3b6e-40c0-abd6-5054c250c492.json and https://artists.proofprofile.net/proofs/artist/756c7941-3b6e-40c0-abd6-5054c250c492.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 0x0ea447c9123b8e303897a63fae3396038bab2fa794e2323fac87835d8302018d. 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/QZNWV2191604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b4db7c2f0d97fb84dccc33a6de2d3a7c37da52b1fc871e6263fbcbe0349979. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:04Z), 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/QZNWV2191605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9352459889994da92c976b661818bd37668869319f347c867cc06898cf84ee78. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZNWV2191606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b499423ca25b3fb7c36699a0a3e29fb2f0e5ea23df7e23ad6abb98c9c4a260e. 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/QZNWV2191607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9afef63439f031fc8cb41245cf59b13e9e16d6573425317350ed63bc6956732. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZNWV2191608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bbd0d98517912ea4000ec2dcb612093c8e7db52f327712bcdfbd187bb0d543. 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/QZNWV2191609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba7b6678d850f509c3458181f2145b183835fda3829a94510ead559304586e1. 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/QZNWV2191610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdd008cad04c2cef898bf8c72d715dbf61f4eeb29afdd3510ae4ec6ac53c4fe. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWV2191611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e505d9c8cc6306943decd192f2afdddd3b395046951f22a165e6523c3508501. 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/QZNWV2191612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3086e8270f1b85f11b5105a8cd21704282a1f908e878899b5920f4ab785456. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:17:58Z), 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/QZNWV2191613.