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 0x3bf7db7c72f201b1454f2b66501b3f6b977ff9479f23328f13e5a6328af5fbbd. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afc6506e-ac9d-4224-b0a2-be1822ed6c09.json and https://artists.proofprofile.net/proofs/artist/afc6506e-ac9d-4224-b0a2-be1822ed6c09.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 0xdc5f479f5e99e4038f2661b3c3648ff3b870d4ed0fce8682dd9f2ad936b65c2c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR2X42039779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00af997148f8f33b089887aa9544adc242be3fdfaa3f0836f2a6abc5a585df8. 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/FR2X42068121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42852c16ee06676fe482e761ec33c66b0781d8f626febb3022ec5fbafbd3e8e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:21:17Z), 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/FRX202041386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b7637694145e6133873e474b419ee1f4d3400f10b79384cbb0a73ffe0c3337. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX202053437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398b0ff92e1fe7a3246551c1dd4c418e486075b2966f7e52445f601f4dec3c45. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DGA0T2430282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026b4eecdc514f8e9ff4bd3fce7435e0f3d1cabddb811adb6604dfe4f8ee3a5a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FR10S2190196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d454cba09cf62cf26e93892984ecc7f5f78d3435ac109fbec070540d8f55fee. 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/FR10S2194057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fbdd2295617adf1d3354418c25123cf4e769e763d9f1cdd61f43586cca1698. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR2X42116564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db49551b96573c52df9646d0a46a1c092270cf3c16a6e89fb8c3313bc5b5b8d. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FRX452129595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb577b7a479c2068697c959c7b0c5068c79836a1ef5b5b6473873c4f7196c41. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRX762178754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5e76bbd6726dec2d62ade4e41e24fc184e9b3640339bd11cf4a194f737e664. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:43:38Z), 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/FRX872152314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cd2eaadef33f1dd18fa2cd47bc7ad93720d1c5f109d5599d2ef6581cadb844. 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/FR10S2224516.