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 0xcbf4a8650b523ae56fbbdf0d47622b71e868ecadbb3e082db9f30d1896e8f244. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cf7ae56-fc76-411b-8364-71ebb88f4c3a.json and https://artists.proofprofile.net/proofs/artist/4cf7ae56-fc76-411b-8364-71ebb88f4c3a.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 0xc49f841c4c16ef274426ef7e0599204b3c683ebe9eff98e7b8d33282dfb2ef68. 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/ESA112429449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e77f6afbf5172011df4fd2b7d4143f2b089098e43da5ee811b7e7bc2e4078. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/ESA112435311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0939c37910448b26bf2ab187f9b61386cfc8863ac90c60c5eceffa0416b19e59. 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/ESA112435401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edcc43126f119f21a9b32ebb215dc94c02cdcb74bfbc53999755946c4c3cab1. 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/ESA112446590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf6e3f552f18b555077dad4479ea03a4fc75c82a9c3bd4c2fb66e5e8ae30ce. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ESA112446607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe924373b094f0a7fe6d6bb128f50eae711ad248cb1ab5e64e3bf2c4047c5a59c. 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/ES23F2400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f97fa5ad496a21fcafd0eb28861a943f67b0bbf800dccc92d47d6d8b26d7a6. 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/ES23F2400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caeca35ee15a0c7a12cc1d31578b62d2e6ffd3533f2f8d0eee8adc6294d52d4. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ES23F2400208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44061073debcce2f349d959eebb4d4542a80dba380fd3e4e7bc31c8d012dbaa8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ES23F2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ae73059ce9f8362210607359cc1f93073e4973d3f9f77e55de0c216a3394c9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ES23F2500211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976c37eb213f4d8deb5b3f39853db0f031ab54f6336f7cb3471cc9ba4c49dc11. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES23F2500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72f5b625169fc030190d32748ee3c4f0efe5e23e19a6b954d1ee58c10f628ff. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/BK1N02500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df7bf2fab0314eb81d9c6b1ede084ae25dee8a8eb6f8d686c073a4e4ac2e145. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BK1N02500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1730cf5804a0a02258693c73e2ddd206ec1cfa8023342b1242cca2ec8a1dc270. 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/SGW502264826.