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 0xd92eee28717cef5a5b834c11a4bfdc22f41f7754b8da282190fb140f85382dc9. 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/7454b8e1-625a-4851-99b3-34807762316a.json and https://artists.proofprofile.net/proofs/artist/7454b8e1-625a-4851-99b3-34807762316a.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 0x0684aba743c0fd583d8cf37e5867deab0cbb423ae1127fcc41849fa2fd59b434. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZTB52309782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfe128753a0e2cef3f66efc575defe5c6db695a47bb956ad250239bd364c4aa. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHN72463783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030572205e76dc4572a6bc7b7575ba88d8cf6808eeb0fb1442572c6db0757f1f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:21Z), 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/QZHN72463785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e312312d5fc0e06e13e95022e55496bc36b40ed6a24af87da7e8c9bc09a684. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:06Z), 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/QZHN82416062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2546640564b42529cf9dc2ab489a7438e92ad3b1e63cffd6b621e4cf280e4d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US38Y2418281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe076d8d4b663da1a7b8a9153ddc43c723ef875464a24aebd53873d995a6839e. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:56:48Z), 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/US38Y2434095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ca80d329f2a0479caab0351bc3f0c403b51b223adb2cd52d7ca9ac62d0da7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US38Y2421387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe076d8d4b663da1a7b8a9153ddc43c723ef875464a24aebd53873d995a6839e. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/US38Y2434095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaffcfe5c3d557116b006fa5e0e5502809753e2f2949f9a9bbefc4c32d4f7296. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/US38Y2515600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e71760446109192118bb6ac24d7cdc00e4b10339749424d172d2e557fd3429. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:48Z), 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/US38Y2515579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e44b5641dd9b61158dadf032e45a5aaa6f98207e77df40b572a255faab6c1e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US38Y2515601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9ca80d329f2a0479caab0351bc3f0c403b51b223adb2cd52d7ca9ac62d0da7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US38Y2421387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cea9af4c259d87d172ea8970116f5e368ec8d1b0a11f225b65edff98fd0e801. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US38Y2501075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2546640564b42529cf9dc2ab489a7438e92ad3b1e63cffd6b621e4cf280e4d. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/US38Y2418281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f095062adf5b1ca78cda4145e2b9d280531a148121d8f47ff84bb257e38510. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US38Y2515604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0cd7484118212d0cf7e3d048cd4bb3c80a3b4d3afa4e5e85912ee17e847ade. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US38Y2515603.