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 0x8b5f4f7e01361bb00cec26793f92afda017e5edd6e37cf5bc0b14060df018820. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4d0ee2d-814a-48ab-85b2-98243c4e1e6f.json and https://artists.proofprofile.net/proofs/artist/a4d0ee2d-814a-48ab-85b2-98243c4e1e6f.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 0xf55086746b47f923cba16af2c063347871bbe6fb729e5ce7e53e1a0e55ba1c08. 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/GB9TP2001913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef118c66ccbf33d450cd4b0b10d28b799cb21d91f20ab336d8cbd62a1b62b33. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FRD9M2200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fd459162eed37b53e74d8fcfea0ce8b781854753babda1741f6d297f91174a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:22:32Z), 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/FRD9M2200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4918bd6eaf31e44254ec8f0375e3ff2b9265ab6695083f566ee1d291ac69bcfa. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:37:21Z), 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/USL4R2354544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f3dcc49d2e17a83f20fd8ea6965b50a9eb62245d57c25a65b623ab05fa980d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UK9AV2400156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed659279a03a1a32c3ab77280c7f6204eec3e734ba00acb24d246961d2cd769c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:06:45Z), 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/UK9AV2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0da8c7126b4fad4ac1a55ce8d81c84d374eb35b36bd4df43e67208981f45f60. 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/UK9AV2400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0b55cd1860d5249344282969677015e9abb7bb5794f63a4acff2d2a709a129. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UK9AV2400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f41d0865a3c82bdc340bc7fe983ef7b39bcd350d2c67095bc70a840afb5a5d. 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/UK9AV2400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4918bd6eaf31e44254ec8f0375e3ff2b9265ab6695083f566ee1d291ac69bcfa. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/USL4R2354544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c77d09a5adafedc766fe93dd6b9d8c99ca4a901ed9812f4607515ca767fa53d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UK9AV2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31aec2b39e76181e4164f1e43f24c12f22dd7352c60a35a82f4c35879ad1e2e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/UK9AV2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6171d5332995e1e4108389828ec878785b313ddfec54c64bd99f75777fcb014. 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/UK9AV2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13cbe024a4464a44415b8ae3999d0257c5f15d1c5a510a728a3c5e8d2782c6c. 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/DEQ022003888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f521a7a9ac3a0da7bd160bc4e099bf3eee7f4d31ca2f37ec8d4420cb15541cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CAN112200967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f521a7a9ac3a0da7bd160bc4e099bf3eee7f4d31ca2f37ec8d4420cb15541cc. 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/CAN112200967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf115f4b21ce5e3b8af654b6be5824b55554b2bc9620a50eeca6289034a5f7a92. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB3X61700010.