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 0x0dc3e51322ef77d2724e1f959f8950c291a9d221267c77d89621a1977ad9e94d. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c28d6f76-2be6-4ca9-b6cd-f92787c1a1e8.json and https://artists.proofprofile.net/proofs/artist/c28d6f76-2be6-4ca9-b6cd-f92787c1a1e8.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 0x34da2f7f96e35ef87f56cac3fa0cafb20a7c24f306ac6eee306295b4fb75df01. 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/TCAHT2319014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a49b7674c857978940414a6e781ebc1c2517d95d7fc44695ee426e38ac9019. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAHT2310225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5874a19877c26ed2914d3ec981ad3ca23b36c1cd5af521a35df37ff6425c9e77. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAHW2433080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2c3507684e643a698340921d9a07eb3a6f65c31dbf5b7b17e1d1268b38bb67. 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/TCAHT2320411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd098a4a30a0d04903964534c5460044bd62453911b479f5e784b55459ab3edd8. 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/TCAIE2409433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab5d631ba74e9a2e99e645c06b384c666e29d6bf6b9eb06081e3bd02e0a44dd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAIF2409691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bfbe0cdcf6b5d2cfe69f734862b8d28de82b5b4ec82daf79568dd6bb644285. 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/TCAIQ2493042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b947e0030882f14ed141e0af7435cebc9f7ee06495ad5a2e04fc032c6b8359. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJB2497807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a6663702d334d42299e661fa2b027710bb538f97bf4e0f5c9bd6c43df289e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:06:31Z), 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/TCAJB2497981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791836ae87d933cdaaaff352662b0530ae01f535d0927002911d8fdc76a45fe3. 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/TCAJB2498119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125f8138215cf6265afa912be3eba91e8b6af0fe0bf354f85cd043567279f947. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:04:03Z), 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/TCAJB2498288.