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 0x27c3856cbe96d1984ea60c1cca3ec0978d7b27847625a0710af12c98f0207081. 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/0fe2bd68-05a4-4d66-b0e8-74fc5f1b4d8e.json and https://artists.proofprofile.net/proofs/artist/0fe2bd68-05a4-4d66-b0e8-74fc5f1b4d8e.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 0xf1ff0db895048f6febdb0d167a41cd165dda68043f0b07941273ec9165e58b3b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLPM11507707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d81a9fdeac0a57f0152832a5fc4de5d028d955d6315a74136fe0689d448448. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/NLPM11512009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f442c813dc0309afaf55eb19298e9f95083ff945fd40ef5d5dca6fb9d98e4ab. 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/NLL6N1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525c53d9d8cca3a9059ea14c3b7bb563e4fdbf8a7ba1ed5f6f20c335bfb2d98b. 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/NLL6N1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41242df3cb9888917f056f41f066890774083a3e30d4e4649895de82ecb0ae97. 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/NLL6N1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd619f314cc004864fdfbdf99b65cd9665ead0c8a80d91891be603335aa1f6868. 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/NLL6N1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafd25d3e4c67f148371775350f7140353528fd225ae59df198aa43ad510b1ea. 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/NLL6N1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e93c69b5f5a48f24e32a4a18d82723d1a309ce458c61427f7f34f6f407edc16. 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/NLL6N1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16925a5d0183fefe4f7abcc9b6dcdc7000c35ba10882b121e42767afafb53927. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/NLL6N1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb613c7584c24304b0eb58cf9ecfcda3a19d3b46224cf6593c3423a0a962deea. 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/NLPM11722987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a48ff35ef745749946bc879e210c823a8dceb3e67462f68e6e272c5257d62b9. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:49Z), 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/NLPM11722988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98f6ac3fc80df7efdc13daea6d3477b36056004ccb37ab7a1ad3d61e3eb45d2. 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/QZPLR2069919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d83d8ac34e1b2806c1c4a97a12828651f0b2bd2075ce2c6b394618449874217. 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/QZPLR2343015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f27536ee3dfcf9e184fe5689f4310a049ca79b430c0c978c3a866f46064bd54. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTBB2327324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b63bbd1415ee4c2be9256325907d4b903505e048175b2f576a4485269c32a26. 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/NLR1T1900173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d9fe3f917c0b9bdee2b5068fba4fb4ef252c0961b873ddada45b652f031d66. 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/NLR1T1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d9fe3f917c0b9bdee2b5068fba4fb4ef252c0961b873ddada45b652f031d66. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLR1T1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d9fe3f917c0b9bdee2b5068fba4fb4ef252c0961b873ddada45b652f031d66. 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/NLR1T1800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41242df3cb9888917f056f41f066890774083a3e30d4e4649895de82ecb0ae97. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLL6N1600001.