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 0xb41f9b48487c509e641af5825b5fbb2b903406cea2508019a456b5ce386b6092. 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/9b98256f-5945-45e5-8bdb-270cfa86299b.json and https://artists.proofprofile.net/proofs/artist/9b98256f-5945-45e5-8bdb-270cfa86299b.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 0xb5bdded2409d0b0f4ebbe0a1a2d49b2c67bcce70030c4e22e1967f322c2ccc30. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ0889339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78420eb03db478a325f9e5480d342b4b8eb4f16874217df31ede822a052bf5a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/US2760700702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918bcf29d86e867c6ef0e6e9d271e24dc10732ec70137533a0b48eb0565b2f71. 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/US2760700703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae26142edd64b60b9d334f284efc6da2da2f507c3722412bd9f1c9935b4808d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:34Z), 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/US2760700704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbb3146d6861d1a9b8cbfc25f6890cda2f90a191d4b7832c1964c68312dae98. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/US2760700705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0eabf2f40b0afa5f02414ded9e289b2b29cba15301cdd784652c60ee6efe66. 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/US2760700706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca97c8a43ac4be7ac4c28f3559bbcd47f540aa40867026f5213533657e51413. 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/US2760700712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2a749e5e6a0eb0565004cbce4782d0c317816e820b7fc354199f8d16c31e8c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:35Z), 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/USCGJ0873006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605e57d50c0d9ec8d5fe0ee776c260e3b861bb041b4b0fdb7fbaf2b89f578585. 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/USCGJ0873009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e16c05765e4f291fac28e52209d81b526bcce2cf59eddb25c76bc5f7c5947. 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/USVEQ1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396334cf1866d6a1ffe19dbb88803f05be4b783933ff07fb484b1a875b22ca2b. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:56:09Z), 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/USVEQ1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496bd3bc6f7e5024d447415c7fac256d300cdfa0ba5177c3b4b3c161fca618df. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USVEQ1000009.