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 0x6f7756dedaae37f1da564a9ba11d021a60ce072cf7cd623677f7b212cde01ef9. 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/e4df2f9d-3076-42bc-98fc-63a3bf3da513.json and https://artists.proofprofile.net/proofs/artist/e4df2f9d-3076-42bc-98fc-63a3bf3da513.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 0xe222a2b765c8a71ab513ea246f9978cce26d795757f4f81ef1cce3a50a52211d. 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/SGB502294878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87db38ab46cc51419bcc3822c392ae9959e9b21bffcff4e9e7a5a5458700f3b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0L2340979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87db38ab46cc51419bcc3822c392ae9959e9b21bffcff4e9e7a5a5458700f3b2. 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/DGA0L2340979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb205da22c16dacbc295e2020dba7f55dee797622744f8465d16f679d96a651aa. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR96X2484966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd4ee2535ab1f0309b45731b184c7fc013d657bf3706f4ab18afa94f6ad5abb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BK4DA2463639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087d066de02345b6aba6b3088017f51e3d4223b57d5417c76747a0d129bf3934. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:59Z), 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/BK4DA2463638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd476deb24c655b079dc63fa0d692b8a60d66095756deba6d9fa967ff21ef2442. 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/BK4DA2463635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3646e9fd93c6f1268963ded499230722a0ccc90dcdd7dbf750d72975db0e5e7. 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/BK4DA2463637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f00f26b5cddb3d0e6b42595087d205c2dec70942507a89beeaf440f5eb6a570. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BK4DA2463634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c9c0e5674c5a85596f1a20f87c137b8c3479c33329d3c6666d7d690e2fbf44. 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/BK4DA2463636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518182408c37c514ec49d2617e005d4e84eae58cca0a07e006d5171ed3975537. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BC3PG2200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518182408c37c514ec49d2617e005d4e84eae58cca0a07e006d5171ed3975537. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BC3PG2200226.