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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acbfc8cce34700dc1e2e04eda20813c3cd1f473f7e4b87a939afb44620c9000. 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/2d8ce3b5-e748-49ae-addb-0c5aaaeadfb1.json and https://artists.proofprofile.net/proofs/artist/2d8ce3b5-e748-49ae-addb-0c5aaaeadfb1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf690dbca474a491625e76548cccb692b71f7c33d08c93c0a499d7b7ad2b35e99. 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/DEYX82231915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb5e0708229b95672ca698d341aadf1fc204368cbad795dfce1888bc3147f0. 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/DEYX82231911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6615506579a07926d70407b89cecc81e985ff4d89174ed05e13a7f086bc0704b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEYX82231910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7043fd860ab45fc0d13a3c1c9c8580d37b07e67374b095536e09ad49ebe6d538. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEYX82237037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83852f23c48ffd5af370fcd1d0f18ad2dc628d03d69d55c1d79b300e5c9e11b1. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEYX82237039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9d7894eaac0eae64197f1016125a07962d313b2cfef9d46984dc784699d23c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DEYX82237040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad50252df6fd526eb4035edc7675b6fca2b04a1cbf56b2075ebad9339996e4. 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/DEYX82237033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91bc94cd6dd0e2bdb074f023b524bc62bcca036ec17ed78343426fae06c242a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEYX82237032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4c0836895a9e200a6ead7f1e6f63633318eba265b63e5f38c06ca70254d2d6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEYX82241821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9419823c397f2c303fdd3c6d517d2e2907f6e51dc570b50890cd20cd28696b0d. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/DEYX82241820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a16681dad03da01f210a1c96e78581296682dc53cdb059703e3f3c326ae29b8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEYX82241829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd332af5c3c909ccfa880eb67ce18550fa100d7b1668c3c3983932c483e3eaf. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEYX82241826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996409af53eee4e6fa86648f59ec7a23d74ef03cace8b08af1d94abc3613c53f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEYX82253401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b3a9f94ffa84dbc67ebbfe9b190447ad65d8c98c61eadd4e6de51e3438e0a9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEYX82256326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1151ded167e0e6e40c81b016a9e6a45d207f213ac0e4bc0860c203eb028d87. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/DEYX82256329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974ada19d9bbe8d6bed686832ce31910def030b73697634901955ced9a664ea0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEYX82256331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba919188bdcb2c020bfd1fa168109c6dd1ced4e1f0a3ad84e60a6a5648412940. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEYX82267988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3788b098df7ae0d90be9b683b58f941afc56b0931819c3274c5e52f9973ae1b. 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/DEYX82267993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b942c810b9ff23552515e54673e389d37839e05a3fb00a488f69bd2da0c1445. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEYX82267994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a534cac01ca06b1d9d01ee81e5d973b649682b4cb53ff29c0b2fb50742e940. 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/DEYX82267990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1859af160dbb408e875c6048469cc3f4db66c2c171b8e97749e62f6a09ab7e. 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/DEYX82267989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9a07789626aa17b480c4963d0dfe9b8cf366127b27f0178d7e568629dfee40. 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/DEYX82267987.