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 0xe0551987cdd02339851bf0e535f6a189653c3dc985c8e6897fc255340c4a679a. 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/0913fb81-51c1-4a62-a059-856d6cca1bd7.json and https://artists.proofprofile.net/proofs/artist/0913fb81-51c1-4a62-a059-856d6cca1bd7.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 0xbda70d71a20892ef7ee7c36932230642016acec5b1a62f9cb08b6f28e8540ef9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W11822814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7573d29aae953ec8aaec805717a3ac2e55432cce7b2bb1a70c0ccf38e2ce8a7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR9W11822815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2460c598c7b7d7a98c484b7f1efbc1769b17ceb5f58dd97ca72e54bf920983d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/FRX852203050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d180a102c4b6525735c9fe390e622b9557725a10b3c0d82fa6b050df2cc3408. 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/MGQ002001812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878afc2773a39295d6cf1262e9fd852a45be4e4107b55840ad510688fdaa3471. 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/FR6S82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb191c9242b1b54976430e840624e1e88103e676efad790277e07a88456e22c. 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/FR6S82300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2970ad45f8bf1c050627567070732c09b7936e05c247e35edd685ad70cca09a6. 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/FR6S82300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690b48fb506b44743c7e40190f9769bdcb94bbd1d43ca1b0b2f85a7186e4e628. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/FR6S82300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1078a25ac898491ddf3709d704134d758d36b9104cdc9c2204c974c876b87a. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/FR6S82300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6dac6ef08f29ec230ae60ebb40a6e94d02e1d5c418bcce407f66d3189baa89. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:10:57Z), 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/FR6S82300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0cf6f10545221abad46fbb027d859d4d3503fa0c1f90c39652355a010cd608. 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/FR6S82300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7083613cf4b6a920a4401e9d09282e582533651d9b69ab75c99e6af516b184fe. 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/FR6S82300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb5fdc48a7ed91be909f48bf9d3fee8fd955f8c902eb7b1ed28dd9fe0dc403e. 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/FR6S82300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc87adac000da39e92c322ed70a358bf88e6fafcbf78e50fb10f3c5a48b06d6. 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/QZK6L2303675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d410e95ad3331fb02754ff518c19639e06fc1c475149b94cad20eca3eb64228. 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/FXR872400034.