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 0x04788917d28391e4ef4931677409950bb449a655642ac1dbcd874e27e0b5ab4e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e6303f9-e507-4b0c-a0ba-c4edfbaa13e9.json and https://artists.proofprofile.net/proofs/artist/9e6303f9-e507-4b0c-a0ba-c4edfbaa13e9.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 0xd6dc046396cc3192d467c8f82e5f00184c2d7c8cb8572ecea5288a5183ae035b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42318813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e02f243e537384aacb9bf76cd5811a86155413983953f986364cee3b010abe8. 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/USDY42318814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c075790b1d1ef30b7c2692b2bf118977188469dcbb98f3a37e41358bdbe24. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42318815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3781f68fb678a596b98bbf0c7e55d37f8e5486204294e348fd28f7093e4fd6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42318816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617aad8e84f39196ee5ceee56e01fca7fbf33a556dc282fbf4b62b58bef4fe4f. 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/QZW9K2442302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f32866b64ab2908ce7ecd40fb4aecbbc369bae10dbae7ebe0f604f55a9bb9d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2464218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9762984d39b442d13f0a40799ae3bc7f8ba21673e212603854abb9ec3463a31f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2464219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8108810c2c42481bf89fa879aaf65ecb6644a1b88d1c488a4ca7d1d1a7e0d2d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2464220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474aec5da948932fabed2363a5a2f9666ac4276ede7e63f99e1a4919ccbb5a2c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BK4DA2464223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28299a634b65ad4b7f92123a51d7592bc4ae31ec6e530b228bf23606638d4eb3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2464226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024b4b6a424e57e1b64609f873201c6c860f01737f60e7c598b19efea3e2eea0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2464229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5eec332213b7b6ed1030de214e2cd4ffad3b2ea156b3d885b74377badcb509. 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/USCGJ1793986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406ed93b87a1203f1c11a84e7516d541ab7684756cf6a3da1e357c6dc15f7f68. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGJ1793991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5826e523111de229d01e8242026466eefe3fa9fe398f25c47db2997a5927ac. 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/ES11D2100475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56265bf2757c595f37945c612807aae8f332c7ac2460dd750f2ae57afac199da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USLZJ2164950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea651c3a51d0bf9293aa606256afef50d34c633d2886c8f9a6c4c6b050e9d10f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCACK1547756.