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 0x1d3a5d98d81453e6df136f9d59a9e4330f0495ab9acaedd369e0281a546a7417. 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/e1b091e9-a5cb-4282-95cf-7a853c3597e5.json and https://artists.proofprofile.net/proofs/artist/e1b091e9-a5cb-4282-95cf-7a853c3597e5.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 0x090c0a46db755414605aa41ffe12b0d83627fd02e83f9f3e9bdb1f434dad5b28. 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/QMBZ91901684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0510ae0b011a4d094c8489a6c1e9a054cacc499406df1be2207ab338b69917. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ91901685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b68b36c512d9456042bd0a94d89bf57bdd8e8877196e7644155c924b184b7f. 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/MX4811300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efafff95914bc2788d2fa75ccde6939aeee15815567a20111f25fb0ea2e5801. 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/US7VG1523228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efafff95914bc2788d2fa75ccde6939aeee15815567a20111f25fb0ea2e5801. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US7VG1523228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc72f9baa4a5e4a11211150a8e3de9e8be83f591dbb6957b00a1c60599a11a40. 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/QZ5AB1718119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc72f9baa4a5e4a11211150a8e3de9e8be83f591dbb6957b00a1c60599a11a40. 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/QZ5AB1718119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e80c814e56ad734dccbed30cccc493844f0f8b247cc90f2842eda3746cf820b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM4TW1916206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3659c2e149227d94ec5ec0da2f09f113caadf03e8857a56569d5aa8e33df3f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES35G1200567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e80c814e56ad734dccbed30cccc493844f0f8b247cc90f2842eda3746cf820b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:50:02Z), 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/QM4TW1916206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8a7aaf87bcc5141561c4ff3ef9a08757a89bff8fe7bd2e5b63bc7ca674a5a0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM6P41849329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a58b97598f3922917d8e7d50121d6eac868d513d996c7bd4ba92f312be14045. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZES71987129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0458237251923d24446e006d362b04bed54add1cda9d229dfec9148062d28a83. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM7281943755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b42c78dfea98db93de05f9f0398791d3dd65fb58600e66210b5e82573f9e7b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:49:27Z), 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/QM4TX2087000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8083003e0f32408ab60712165c7e1f8cee4aeaf5a8715f2e4bae905baf54d676. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM7282048669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e382eac07a652f05d03b0fe421cd29e85590ea93bc69b914098d14d4b24b80. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBWUL2141770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92987e6086ca7e833851eb1c0ec779a5bd07537e09d30633f7aee0b6b8ce3989. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBWUL2144897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e382eac07a652f05d03b0fe421cd29e85590ea93bc69b914098d14d4b24b80. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBWUL2141770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41efcdd5e3bb1818be02af7a199106ffbed610f4b5159ff78cd6f8c36333e54. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:10:05Z), 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/QZWV32460361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2db6d5aa6e38f79a5a18f04ef2bef5c52b19988b52b11f5d86d5043f154c5a8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:09:34Z), 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/QZZ8B2491586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce94094e60e17737dc6b7cac782f9f8ec6c64e08b7f480c3144856f417c5a4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNJZ2514358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f472e4a2bbc6fc917e4a5d0cffcaf97a01edf31db69ca53959d419a80a5a43b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX762283220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c8abea5ac8d94011259e0db8d64edb45b5cd9a328c1f08461ddf4e0d3e77e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MX1722101371.