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 0x796c7fe39eacc1b388575bc11c7d8d9b37f2ed14d7a93922430277345b9d3390. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f36a8ec-ce0f-43d0-9f7d-3780a5703368.json and https://artists.proofprofile.net/proofs/artist/2f36a8ec-ce0f-43d0-9f7d-3780a5703368.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 0xbc49f9691e78005f70b377d9c05e8dff3d002a633acab7e60367205a1b40e79f. 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/DEB330915901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21023bf8d4d54afe9168fe4d5b96e39d5bdfc56e6c7dfc03f4635494aafeed8c. 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/DEB330915905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823dd72d7b11372b23a91c8599d84e56b98e295ce693ac598e996c5bf0b22747. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB330915904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86839b71d9fad5e4363faa7c0ed58497be06e25e191005b69d209c0c394aaa0e. 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/DEB330915906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2044386bc6ea122582adb28e06540f49f14c93bd77d965f7246ddf9e785bec77. 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/DEB330915911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6737460c2b9c16073bd0b282c92e2de68e12d454cc8d49587b3cb6f6137db4. 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/DEB331652401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3757da25ebe619329b3044d92abea48a40627049b793c7bb8afb5c0f1068b3. 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/DEB331652402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a281a2dca52d4af7dfbfc8004b23e57bce977d005f4b6b85c49331f1610c4c. 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/DEB331652404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe232eb520bb5db350547032f4230f0d9f1f9f5da15b4290edb58fcbe007124dd. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEB331652405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4cc6ff518845aa0a8c003521cb7729c5e86b9dd36e9e9e603b9505dbbef871. 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/DEB331652406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb1f1c45f2639df14545bf6225cc34cccbd5ac07d4d989ff5b6e4d866538210. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEB331652408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59503a01ab1d2a92a33040aba175f3448438d11e4f18656efc6658b995f67a8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:50Z), 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/DEB330915902.
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 0x0067aa8f85b2891dc47910e3975d70c94454f2c7441200d3c341aabdb94d38bf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEB330915903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87233b070dc358c81a8c80fd02369e89534bb5f166507b4e804e29ffc991c1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEB330915907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005103b5905d96c199a9087793ed49be5e7fada275588b4412e01a58c56dec07. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEB330915908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475f7ab1945c8b1e4b581f9cf07e226103e561ef86f089fc7def6d45d1c21d59. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEB330915909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426884f0e115a9242c7318be8ca1d6e0e3f53ce8ad7f88ef71f27933dd2030d7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEB330915912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7144889e8318f57d3b8b706836090e75d40201822ec4ee27da9db555af76bfd6. 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/DEB330915910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2de5d9e9f875f40cf11e9b20a47473637f6a68183bc90650c9c705474df5200. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEB331652403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955f3d1e93acb8bb41ecc45a16bf22e51f7a5dee46c2b9c582aa291ae712b9a0. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DEB331652407.