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 0x8ca7a35e37df3ee020fd71d00001c439e2de48e170af7f3d948ec6d7b0c51005. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/716f21d0-d241-4bad-a941-02500329b64a.json and https://artists.proofprofile.net/proofs/artist/716f21d0-d241-4bad-a941-02500329b64a.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 0x1e2beba307a3cc09a52b02f95e511cf1dcd5c7982d5fb58d2ccadc396ee2a3f4. 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/QZTAT2257471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8d5ef2697183fcc7aa8f58925d535ed0dd0ad9c8aa977f3ed90653e9bb94af. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZTAT2259473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5b4273a419d1750f8e3ef8bcae630a5227bc851ad211367b5e6cdc5f06bfea. 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/QZTBB2233093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297fcaea5e88fab818cfae5c7a52b822da7bdd891637880fc008addb47f25450. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T13:19:45Z), 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/QZDA82332949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b60588b2b389866a8f595e589faaa1985ee1e31b1dd6b4eddb4e67399eebd2c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6F2377335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe778b2edfe01278d68bdeb9132f8d8947f292d6aa6df78c2d1b2a05e379db85. 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/QZNWW2329310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0efffc7f03c178120dfa93f84dd106c3e4ec5739b4310c701e9e4867ab91e5. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:36Z), 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/QZNWW2329312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dc6296aa3f5731bfb227955e9bd5d9a8157082ea92f725a202219a284b4521. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTB52344132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa7565a247e442fe3cf2b0d37f2645e632da00baaaef44eb5b2cf53cd15160d. 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/QZES82467159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d5f3297a0c3f151442d6978791eda402b82e6b450eab307052aa6b5026951b. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZES92411184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ef8fc83911b994153ca0a3eac0837fcbd97134efd55d999a866c057a62575b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNA2412374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6784620bdde64840885c86bde0ecddd0b0385b56daeb5d6cda40965ae90d23. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZTAU2430147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fb7e6bab42899909f26f727022b17d335e2f7ef9a36b78dcb8669e85d47a32. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:33:35Z), 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/QZTBF2477758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f3e5eb36012d2fa00ff70a863bf36b7fa723738dbe3650ae44c5cc069d137b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ7M2418169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39549fd4676a286a9f34eb3e27e433b28e3bf2dc518ae96bb88c238d4ae7277. 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/QZZ7M2418171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0227c4bbbf604aa6ea64b1d6aabe27bf3f5c17fd5c845ce966561e04ab1f34aa. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM3DF2410709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeb72111826046dc6b33cd332a7cb1ccdeae09c0ed0284beeea1010702ce6d1. 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/CA5KR2509589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed6d39df05508e8123d5544df70d09987920fe676d935dd07b3440de21d383a. 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/CA5KR2509590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fa7e3a433118406c83fc985cd579afc43f894976854524c191b0acb893ef76. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2509591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1818f2826d0acae4190dcec877bf144fe4098caea6e84911c2a7adf32daadebd. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFQ2500708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14535e332daed318259c7d235d1737f7179662c15f4c69ff3c175109bc0a0bb9. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFQ2500709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30eaf3ea193a073b13e95990421d2688fa90a7c6dc7aae0154a672e18b9310f. 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/QZWFQ2500710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9fb9e49ec8ead076a106c5c1763639f38f23565b5352223b89948139f6ff98. 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/QZWFQ2500711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ead53104aa4075eba1b93d8957bb1a98cd4495e6a49df78931daed47b4ba90. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFQ2500712.