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 0x7e621582222494c919dbac47367f607ef1378e244a211ef3615ddbb69de59c54. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/311d91b3-2a32-4288-9818-b51a81fcc552.json and https://artists.proofprofile.net/proofs/artist/311d91b3-2a32-4288-9818-b51a81fcc552.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 0xb558e4a04ec40e64a8716f7f133fd94d3c112da30494c9fe2f7e55a2e0519613. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES82143408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfaad35cd6bf4d8ef113c2b0bfbf2f463070b7810b2ed01d52bc87a50a65bf2. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHN52162843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e2d2ca628749d032c8dd74a1de62e2a8d99d56c0e09627834a6a79de814e83. 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/QZK6M2167627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebfb8a009a5084d93331df2c658f1ac2c07b8dc2fe10a30f598ecd5d938612fd. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:17:26Z), 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/QZK6J2160111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d7c14b485412dfbf3771096b63c4c0400e6801a521815b7459175d8e07cc23. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:10Z), 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/QZPLR2251834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c457b4bf407041f4935a7d7a0a889ab7e0d801afa7e23fb32f2dbd87c5b520. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6P2360797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd9ecc1b571fd33f641ba5937fe151e561e600b39b8d1739c838cb299a979ae. 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/QZNWU2300590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6655f55de076778fb7471e8bd628be77522a45c26973c80fc1b6d5307057ed1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:11:44Z), 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/QZRP42385143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb00702d59c0cfa7ca038823d36bda92541b4cb095fcf34260d9f91182caac49. 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/QZWFJ2333254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa40fa5218d278608677dc3f740150c0b4c3d065abec31c506467dc52749f51. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:54Z), 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/QZFZ62409834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f73136433f064c9b83ad6c34f18a300eeee8a9cd03791976f257550d4361bfc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:01:58Z), 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/QZHN42454890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ba2e672d5764bd4e88241e2f7f9c1121d2e9674204a9e1f23c54dbf0b64cc8. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:56Z), 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/QZTB92321099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae14c3fcf71f293ff9ddae9038c297cd9eb829198cb9ff66231617b383f01e9. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZPLR2453485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eac1d37df9264318ee7d92408c48a8563137d0be85e5344ca5f10c4cc36b8c. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZTBD2441066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c57c278b1faf4d018b24969d9bf0f10d644cd9868403374a504ba4109446a90. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZZ7R2446558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a3eb19bb843bf751b9a5dabf6e7d9798d33af2cac3fdd6e23f48376671e674. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:53:25Z), 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/QZZ7X2458622.