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 0xb2ad9ce7ffce788d4106681d6af72a76adfeeec1248bbe2dd396f87cc978e3c7. 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/3e599dd1-270e-40c8-a713-b2d33097dde4.json and https://artists.proofprofile.net/proofs/artist/3e599dd1-270e-40c8-a713-b2d33097dde4.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 0x9b3befd80b6788ffc7de3ac9c503f6d8be477bad7a5ddca826edb7deece741d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZBAIK2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecdcf32269ca8a7352105b4110c212b6deb8a1ab24afae35fdbd19362ab9dfd. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ZBAIK2400004.
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 0x0ebf056468fdc1db49c5dcd4a2ca24446eac4f2ecaa550b38f5404679f4edf74. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ZBAIK2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43d6bae9f4d294f34753d5f27a4a24752f8b967a4580e8cff08b630131c31f6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ZBAIK2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96fb54207bb58df783cfebbfe375119bb90630bbf36c19870a6cd9b05c86caa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZBAIK2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd11dfd9c2f59cab2043e074bee3fccd9d52e994485a0f86254a699de61c369. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZBAIK2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a847fba817b9a22f29e82349c6dbd6a85dd63d745e79910951864f70f47c21. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZBAIK2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa658706bcce7fb8053f4ea18eba92ef400ba2134e03d2bca155d5624a797f811. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ZBAIK2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd392bb293f25abf3d5aeaf80cef5e2f62f2a36c2b28cf76fc6e403f7182df0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZBAIK2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd38433127f1d4bc168ce6b90a1a33831d2a75a6604e8538110f58738f433a99. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:16:42Z), 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/ZBAIK2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc286ada2da7f83df2834d005d801cd1cd3486ec2195a999b946fabf15df1851f. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:32:33Z), 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/ZBAIK2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd353efda0317164cbd8679908a72671d5911efd60e2389e6fc0adf94b31193f8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ZBAIK2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44041df85b8a3fca0dd4faf2151decf7e2936dd737b5b6efc80a4735aec7534. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ZBAIK2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8686afdb5b60bcf3ddb82773c894071d3716d067295735477bdb45e40f61813. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ZBAIK2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721247daaa2ae1fa88d16120e24454f7a428b1ff7c21dbeee19171a00679e7fd. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ZBAIK2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4142b1638b177bd2517bf1599e5801523737b954a684260d3042804ea956fd84. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ZBAIK2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7fbabf7649d3ae72dc6a71edc20e2f8e9f3a1df926ac83bb2fde6b859cd291. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ZBAIK2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a6c144aa7748179ba95e94cafed0ceb7230c4905a5fbd7f2ca69b538b14dd1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ZBAIK2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5a02cb3721ce8da69b23863fda50eeeb86de717d8a1721eb0c70d110e78a58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWDW2471483.