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 0xb5299de6a2d45f282c7c1907e9fad05b2e8db9e2be13b2f7f7e5e177404ae99e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/563509a7-77e6-4ab5-bf14-5c0f322372e6.json and https://artists.proofprofile.net/proofs/artist/563509a7-77e6-4ab5-bf14-5c0f322372e6.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 0xe7f5e703dfe0dbe83e2f6fee1df74f74aee81c2d0aed61006012f4c6930dd57a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWS651200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce31aea3e79afac0630fe5b84f4d0efa54c88a77b99f290d905da30e040c105. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWS651200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cb97c62e2ef9ed00759939b45081f5d908d6659b973229a792ec37398563f6. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWS651200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743071ff035bd9188bfce5dab4e29b5d48669bea1d428dedb600f33bff02a4be. 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/FRX762312625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b6f589a99360e4509da112ef620b3458ec6fb1b7a4cf4de21dd2e8baa25d6d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX762312626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b9e29955a9c2f10b45803e6807a98a7e1d963c18adafa34de45218e9efecf3. 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/FRX762312633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64b1e32b7b4d708c393d47a67eab8d5d419ef13ec80f49bda6c91005e842bbd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX762312629.
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 0xb16d5ba96093f94db64c1b7404b5bcaa31f5b4e612b971e1ff4891f6eea4c40c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRX762312630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2f48e39b1150f94f395236ea41158977984b8954e9f345d04a7c483bf992b5. 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/TWBT51800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7485eec526d6107ab03a00077f447d98772fd69bdd9f57f14ac4086a24252779. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWBT51800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5908ab55debdfc5843fc0f43e4aca57e3eb74aa9e0b9812332b6ff003dfee30e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWBT51800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe995c6a2b4cddf135f5c79d872a0ea689afdb5d9aad17ad7be0ae161cd3a73. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/TWBT51800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1c0b1651af3b8211b0a14ea672470c36cf72703246dbdc3a014033c0410fbf. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TWBT51800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b8afd1103f134f116ba0a81a063451d5374808ab8b6880651b41f8de0762de. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TWBT51800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c526b532fd6049d6ecc157c16239f9ea2779779fb87d901e078bc76bac2cd84. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TWBT51800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b9ebf0002de056ef5a94a30cb8e1b10f88f14705d075d2a5eecbca36247dc8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWBT51800115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d17a6374fa7b1aff53a58fa6c496414f39dbc91cbbfc948bf260bd463fd9ef. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWP011317910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9359975516ea77d47ad6651353c2b0c9c676ea775aceb636d353af600f87a086. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWP011317912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5e34d809b23fbfb1522eb8117a028a8e181b1e78bcfa69f272710924b05b38. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWP011317917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231645fc1b04e40881ddbc14767385dc459b1792e86cdca03ded764d1b6d7b0f. 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/TWP011317913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634a935f065fe12cb2e280471ff5975cbb092fcbf002bb3b275f61ebcfecf66a. 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/TWP011317915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f4b65c9b31d3729920aab398909aa0356ab91a5a99d607143f619b1bce9286. 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/FRX452333219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7782fcc775c0e69755f641b6ad8ccbf108c4516fd5445479851935cd6a2b7769. 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/FRX282342962.