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 0x655dd2426544301c65d04fea7dec36295cf352999212723bb0e596e321f39555. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/236ba74e-015b-42c8-99cd-643f5def86bc.json and https://artists.proofprofile.net/proofs/artist/236ba74e-015b-42c8-99cd-643f5def86bc.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 0x719d61277d964ec41b5184ca0bd75f3034ea7559f80d9170cd0347c718752de1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:36Z), 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/QZWFU2548353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b0af562cdae6f98670fb538e8d9ea1d711f957cb8d13fa71cdb74f0cca2cf9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:31:55Z), 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/QZWFU2548363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875d48af274319fefa506274eab9eba4cdfc36e2a42ae917eed5158a4445dc20. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T13:00:01Z), 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/QZWFU2548376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b52126f32098e9caa96a6e49039b2cee59f943adbdc9c2d2d3472850312c2c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:37Z), 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/QZWFU2581693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4730781738e1073e0ec9bdb09e452157bbe9ee7f823ca980eac8e5693c00ccdb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:06:45Z), 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/QZWFU2548395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774acd0fe61782335399e4933b8aa4b0696db5906bc1eb03b8897b86304941a. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:46:38Z), 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/QZWFU2548452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609cf289aaed3776eb074b049ac8165a94ee4eaa930517aa4be23f85356025a1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:25Z), 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/QZWFU2587160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a6335e3670e58e931e83cdd46a946713762fa98bf68fd7f73ec96bbdfa2ae. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:06:00Z), 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/QZWFU2548402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5e2e2a409d64694f43a1c26b94bd1accad190e5929a91d48cb42d214b23da3. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:58:10Z), 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/QZWFU2584678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74df5a1ca3c46a7e7431d0fb668e42d17cea53eb49f4d273733c929fdfe842ec. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZWFU2548495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c5783fb76c1d3718af092d8c6d2d279437a1ba999b91c7b63c197a10757131. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:40Z), 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/QZWFU2587180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f827f84b9e2ae0552e6fcf6ffac006e954301338e92875f35f7edfc2ac3a8e8. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:54:41Z), 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/QZWFU2548465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232feedf9c4b24dcf0748f702a77729b591ae99ff4ad0f4ac607eed9572da877. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:49:53Z), 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/QZWFU2587544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e352ae3da26303f1025a57ac26d915f621e84757be5d8c18803fab8f71406a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZWFU2593383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1eafd5711ddf83e278a85cbbf9ac8babc72c81f3b1f56ec9748733b7a1ecdfe. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:28:29Z), 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/QZWFU2587301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65b195e8c297bd8a1862ead8572f38cebe0910b2ad37c4292eb54bad4e6614c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFU2579324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b52193850791a582510672cbbf11b00b91e8be4c251d94a2f49db04cf47a20. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:00:58Z), 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/QZWFU2587553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa4842c59f66bcb32f25c138ab0dc85927b86a07888a985a1e66200221ab1e9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFU2599074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f22ed46f462f76c97dce3da40b0ea31dad8af1243132983311fbbd51caa654. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:17Z), 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/QZWFX2529610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976969382fe88fe480ca5675b0d3f2018360af4e290f87df2cd5e5ad5e714ccc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFX2529583.