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 0x7440bc93b655f9f58c073942bce455193732e4206e293948fbf41d0f7c558423. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af23cc1b-cacf-4bcd-8d93-0304be9a3a40.json and https://artists.proofprofile.net/proofs/artist/af23cc1b-cacf-4bcd-8d93-0304be9a3a40.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 0x2f2d8f757f391b1aa01620eb28d6c25c8f5e5cd506c003e5c6848e6f5022d46a. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:47:02Z), 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/TCAJE2581295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a116b5c753caa5fc04d0b228a5b494806b734f997183d5bebf9b1db1441f90. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:07:49Z), 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/TCAJE2581302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a078dfcac8e1199847863f3a250ea04618753e27ec6ae630c85d10042df2a4. 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/TCAJE2581320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73f6fcb0b329660e69c893f12c9db9485879296194ac58311bbf107600fda48. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:24:23Z), 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/TCAJF2578804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ac186272b10763e7ad817b0d2f1736177f4075f7a01c3ba513f04ee3c4eaed. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJG2587792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844c4de8f1bd7496cc3c580c33c1ba8b993667a3e30efb1dbc82f7406be7e35. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJM2579972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61d1173923aff8fb74fa8b5e024ff6ee275979494f7afb7d4b70e7df6523f6f. 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/TCAJM2579976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae56ac3ba26e06285d7ae399d83173e2c6046079a7623588b388cf84e181c7e9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:12Z), 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/TCAJM2579999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0209982bd87ffd1f637bcaaab84b951e2d6661aff97ed3bfad36b48b449e1007. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJM2580014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99054ced4605a2c0f80ef120f207071925747e562e34ed746da2a1826b47d6f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/TCAJR2579071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2af52653ac8b23a10c7a974cfcf5ae9b50fc3633a387ad237eb66d17bb6915. 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/TCAJR2579076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12ce963566a91cc697b25422f19e75fdcbd49f1fe81a15bf696f2916ece3f81. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJZ2509120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdde1983ec974142f7f59e167940bd481372d1c617c94898abde0a89cd728df9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAKA2509122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade2fdcf3356658abdeca399873c314af75340cc1155a774f1f63ab5a19ccf31. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAJZ2546065.