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 0x55e5847cd608728a4b095c7edb63cbd6b3923d700687a9ddc6dab1cfb4ba0d52. 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/591df312-cd10-40e1-8ee8-9a5b105ad846.json and https://artists.proofprofile.net/proofs/artist/591df312-cd10-40e1-8ee8-9a5b105ad846.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 0xb96532c31aae0311d79fb5cde68011843c39f17b44705a141bdc43a6d07c97df. 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/QMBZ91979129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1699ab9869709c39b05aab20c66ba65c7f18ad8057f5b5e96e024b6ad34698f. 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/QMBZ91956038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cc2568743f1c2dbea6d7de82c4ce285b0c16778c948b7815f926fc1ace32fb. 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/QMBZ91956040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0388b3b7a06f6994721dde116963fb9e4a1a9c38e469a2aa507af0185834f7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMBZ91956034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e50eedfb0e7b838ab79dcf98950ba426419afb785bba7659eae168cdcb90fb2. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:16:59Z), 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/RUA1D2022366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70bf5ef2014cbcc73fb581f2b312727f4f97f25580a6efe3a32e79c85883522. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:00:26Z), 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/RUA1D2022368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6488e7cbf4c53f7027e6326af3ea050b9c7f66ee3942948ad0396c2fcd75246. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/RUA1D2022370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d7dad7df6ea2ccdb22f9fb0e3e877348812b3ac196cc905751133c7c3eea72. 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/RUA1D2022375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2108e0448190e384ae299c4b2d5a9b45df42fb59f296ea55cfd7b8cfe744932c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/RUA1D2154780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ad1332cccfefdadde8961f5e64133ae581e2735438fe5daf470a9ea489e0da. 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/RUA1D2154781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9767e1d1518762f77ba926a64d4d1e6790f539025c2e8d04abbf88280f35e6d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:27Z), 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/RUA1D2154782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eb73043d40655aef34c68dbf01ddf9d4db19f9768ccfcf3bf02e02d4eaa8b7. 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/RUA1D2154783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0435995a0ed056f47435b26f49af917c6b008a1fcaeff2f3dcfc92fdd8622d7e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/RUA1D2154785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949db0c9e9fd7c0349404a752085d8a4d34a4e1001e6419b2101fb13eb30fcfd. 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/RUA1D2249917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce76efc81bcfc90cf672dfef3e7ca2ce4eea2f2e06c52a44b92b648d61c5e2c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X42486475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2aeb116c6423081a39a120dac0581e67a1660c62f1e9245035a6c69135a0d1. 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/FRX202455543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d635024c4842b1fa29ad7e68e3701272e2f7c2fb4f86b6574013cf4f999a7b5. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FRX452449997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d635024c4842b1fa29ad7e68e3701272e2f7c2fb4f86b6574013cf4f999a7b5. 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/FRX452449997.