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 0x823a10ee125de42f348fd195bbd7c9be3a2ede140304c70619ba3f72ab48673b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3516f17-4d20-4b54-8dce-8301b4c708a1.json and https://artists.proofprofile.net/proofs/artist/e3516f17-4d20-4b54-8dce-8301b4c708a1.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 0xf8b27e201d8aed514cec9ee3e16c97d5ed9332d5ce3cd98f85b3e17a29033a91. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USLUU2200633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ecd769fca3f52c2fabde2d430e232545cb4007113d5bb9936cd37da7f228f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:06Z), 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/USLUU2200845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4db3e0c03a0d3b1810baa66858fe4464c4b164c15467d745bc832e673f9c91. 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/USLUU2300580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e58ad937891e5562f11fff34c5e0eff02b63a9b557dbe038de7fa5a87caaeb6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USLUU2301417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b1f852ee80c5512df023008df189558985ffc238a7149c85f7c494b7e67337. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USLUU2301419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0b35f5d723c3a051add4dbf85708a10eb53b969d39f5c99b263467e74fcaf3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USLUU2301421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce7fec93995927e225b2be5f180b0b930e72906b879ddbc810fa2b265d2b2a. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USLUU2301519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2aece56a6aa04c5a7791add466d5ab410704b1dc48419700d87563cb4ab3cf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USLUU2301520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6a3bfd1bc96bf5ea8794e09f93924c65ba5eb29a36914df3ca48dd14dfb631. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USLUU2301521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0875207f8c320d9b0cd0eff2febb30d8e32950ecfde6987561fbbd3462d7021. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USLUU2301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b23b01d726d1f8dd7277155cb6e705f272eede522cf95c3184b2e1bc74acebc. 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/USLUU2301748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d91aaa28fc30b31b5ca2ef9806484b4c7435269670473c4ba2c7e80e5725962. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USLUU2301985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0f4a1a05615ccabf4d6df0103c99926436b762e6afe9c2fcac06c37ca76bec. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USLUU2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf2733b20603c9ce309688178c407193cbeaebee852eb4887f066f76e61aca5. 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/USLUU2400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c316029a86d90dbcd4c0d646df52ef7ba478af009c89106305bff2f727789d. 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/USLUU2500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34fa046b4f12184f5b87bffd92cca9ec9367811cd0b10eda61b445bb7a3d1fc. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:51:16Z), 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/USLUU2500302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42a41cecc0a673b50637ecb19f8d7785cf158ded05cd8ae7d885e482e8ea732. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USLUU2500305.