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 0x0d0a4956c1ac27d49931bda4fbc33099b1022e4bbbec7d3d147a347251f2dea8. 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/1d305299-63d8-4706-a047-e3b56e31bd2f.json and https://artists.proofprofile.net/proofs/artist/1d305299-63d8-4706-a047-e3b56e31bd2f.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 0x8c10dc97f8d25dccd3f2cc0cd4fcd852780994705987e1f7aa8245c2cd1906e4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR7OZ1900370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8297a5d5dbcd361b1a5f14d1f2aad2a8071e6514c4818aafa53f709fa55c32dc. 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/FR2R02000370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d4ffed431bca2bdcc8e4fc56bd66e0b895fdf6100331390750ab3214872ff2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR2R02000430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd4d21bd896abb0cb1c5d684d73d81725320dac3a1a7626587b9e8f665acee. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR2R02000440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d4ffed431bca2bdcc8e4fc56bd66e0b895fdf6100331390750ab3214872ff2. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:40Z), 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/FR2R02000430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdd4d21bd896abb0cb1c5d684d73d81725320dac3a1a7626587b9e8f665acee. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FR2R02000440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a76cb717de769829ea5f4d8a9d326bb3b73976a93e324d8f07ee0c192f3ed2c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR2R02201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c5265e2cf7ff3cd40b1da97d3597ccfa08d0d0f020fc83e5ba5df7ffb43c5c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:30:01Z), 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/FR2R02200950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a76cb717de769829ea5f4d8a9d326bb3b73976a93e324d8f07ee0c192f3ed2c. 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/FR2R02201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5056de4498b01fff80210567c3f9504d23def2ab2ec836b410081341606bb4c5. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR2R02200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c5265e2cf7ff3cd40b1da97d3597ccfa08d0d0f020fc83e5ba5df7ffb43c5c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR2R02200950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a76cb717de769829ea5f4d8a9d326bb3b73976a93e324d8f07ee0c192f3ed2c. 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/FR2R02201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9934a6b35636289f1dfc718a651da487c18ddbcefd8f63b76f803153bad6614. 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/FR2R02201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4910f7d4daf6336d8e7beb85b88bd690e7124b5408ce83aa978a9f8b1786831d. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:14:36Z), 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/FR2R02201120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6839d4fd5684c02389d65e8aca754ec48bed8d60cce53f541a144a3482ec9f68. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FXQ022502310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0a5b210a0dd7a477d25b551bc02d10610a623937a8aa9f201d61881978b515. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FXQ022502793.