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 0x0d712cb0b37ad1be36ac3ada1cedaa9f66068bf86d5eefa15f5c58911fb104fa. 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/29948073-8430-4499-91c2-c8a6d24cfed6.json and https://artists.proofprofile.net/proofs/artist/29948073-8430-4499-91c2-c8a6d24cfed6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Not Yet, There Is Still One Projectile Left
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 0xae43e1d4e595e9faf7e1f78a4306bd46d1f53f2d322832c35a90454e52869880. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZK6J2151780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5e444cb9aa34d276d3ffd7785ab92668f0f778c834e8723e8b20f55fbb60eb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWQ2122055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf0a80ae1847a8502356074b6b2dc4d8bf755cba5e2b04af1a2e87b3653dfea. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZDA82163950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b45bbabacd269ed97008c010d375ebd11fdd4ee0b8b65fdcb494d9c5255cb80. 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/QM4TX2272673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7a0522c80e9d8621691eb7b8794f8eac126ab21783d4c9313db78965775067. 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/QM6MZ2323804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2a9fb60fe63dc34a77a48455e360526e89d55ef93282fd48d6f89159c275ff. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QMDA62247210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a303e8243893775c3178e904537c9d90bfe3a06df375d39560ee9dad5cd813. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QM4TX2292066.
Not yet, There is Still One Projectile Left
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0feafa79b99deb07f1cb226cb0d7801af5f1482d51dd1f4a2f9ad55eacc177. 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/QZNWZ2041937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a02024ae8b10ab6d5fb30a43d87a727a139cc4a94c20631792a45de9b26b70. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QM6N22281904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159b524b68106ced1c43b92d54dc866ece26398e5e8066d09c2e86eca6ffcd5c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QM6N22283941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485229e821e21113a7fae4d936838499388f2e4ee85048be2f1dced83f11754. 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/QZMEP2184990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6845e60e848f3aea78dec1f5a4210afe6a9ca91802d3737560d1143e56896bca. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QM4TW2303133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced3cf0cc2ca6f661719690c2a50518a1c158d4c70018bad9882826741e17bce. 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/QM6N22498680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462320df503c27124830ef8c6d2496d5f5ee09468e9571fffada62e92f6c5cb5. 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/QMFMF2222735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd736b3e57e146c97e8df9d935fe524d036e945806f5027f8a4550552e925796. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QM6P42319661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d78dc196fa59ef2bf7b38c732d3a9be89e73740b8c769f7ddfcd00a88b67b83. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMFMG2316693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108c7b1186a433e1fea73cdd2a53fed8ebcd6937b53c80c1ed22c2816f4c07d4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM7282423581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd15b325322f42ea5457f9f26fea1353f438a6abdf56b17118a2d4109a1d8d66. 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/QMBZ92410133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505fe200cd0ea32a8462352fd1bb8cdb8b3b5976d0110a872e3f4fe30facf941. 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/QM4TW2401095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0665f389e88294698bfddffe8c2ff76fef0929fcfcc39172d44dc7b26184218. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QM4TX2325912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe899cd5e63bd2b883e33271145650653955e0fbf159364c08f0cbbc911ee1c84. 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/QZNWT2171657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9816757f1ed8381b5dc7acef2b0ede0a79f930256692a444a3adf9747c6cc4c. 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/QZFZ32179361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a2f74f9d5b572808258cd98b7242da1bab1ceaec1599f8ef06a44cfe9cf3c2. 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/QMBZ92497415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1b7b0e731aadd0fac763bad8d26827f2077a0f1a3653d10fa3330a0a6746c8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QM4TX2432015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3099ea422ad71cc32b9642d3b1de65ee54358615c2cd024b84f415028c71cf. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM4TX2432024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f10377772eb8981320e0bd2ef6a86d9025359248732aca273d4e26c250589a. 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/QM4TX2249034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3d77f3b47061938d3349d9744b7ab7f1febd5ea39f3adf22f000789aa9a72e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDA52264276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee826abc29cde5b06b7e0d570f18242b2ec81c4f44b6ba112213d86d0fc6a55. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6N22422373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23506a968fd9efb4e12450afb05e40b5f3506e184fe16b52c22b8fe6d22f5de4. 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/QZHNA2192108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377e999f8be39b52d777d649b3c3a6d1b3cc700aa5fb7ca4cb2f3f096d60a329. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM4TX2442378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec6f81c713622063cdc95982a63c21181025f90d4c8167890d2d79213e72b1. 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/QMDA72413126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00868d42d25759794e9e54c4c5f3d8e24b22aa4c79ec667f3de57a2aee574628. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QMDA72413132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1df4d8123371024de863a96a4b9334895e00371d7fe073588342ec0b77c8a5. 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/QM6N22581432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1df4d8123371024de863a96a4b9334895e00371d7fe073588342ec0b77c8a5. 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/QM6N22581432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb1a2b3051fa80511f0e84a5f6bb3712b1f041b870839308c9d19b7387ea186. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMFMF2527751.