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 0x4977311516c84fe66319b6cf0f3b0635e6d9d3baef4d16bafa35847ba3e2d713. 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/1fcc93bf-f25f-483e-9538-5e920805391d.json and https://artists.proofprofile.net/proofs/artist/1fcc93bf-f25f-483e-9538-5e920805391d.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 0x340c13bf2ecbbef4718a54bc21d5cfd414228d2cb83e6b68fb079ed700833047. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ITZ0X2090170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa252b2e9b0b8ab3e93cd823a1e94629f44c000cdb55812d671261e77e0b94598. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ITZ0X2190099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4b606271be73e1e6197a5c0d8b804322671274161d10ed4e88fc80b4c7c6f7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITZ0X2190292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0791ddcd8219e66dfb07451c9bfb956b38bf154fbdccda95077c6bcd19a650b0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ITZ0X2290151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefec63848a6ca36395c659bfa27119f20a40d53cca0aff59d2708e549c09e781. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ITZ0X2290154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844ae87980fc76ad37159b60a542b23c0a0ea3af38341b7adee08f8ab9f82cd5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITZ0X2290142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb611d988badce057407090bcfad30d03981575259cae7ddd26c2f0c4d718fc1e. 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/ITZ0X2190232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f0aecc7a8dd6487acba8a2ef6ac2e5541a452781934627930fc58ca419a6c6. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ITZ0X2390175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd984e55318ed4adc02577bc8f186b73113c923db8689a8111c2f07dcbc039470. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITZ0X2390438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17df75bb2519b59377c008740833297377c2702a91cb447380821ba36f7c147. 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/ITZ0X2490037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66eb02380a69cd34744248f688e2525cec4ae943c1ad70c7f091bff2314fe7ef. 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/ITZ0X2490114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645587f485e3977bb101f91241adac3028e2c602d4ab4bb73b6a4b68111b6a33. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:57Z), 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/ITZ0X2490265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d50fbb7d8761c80f3479e41df03d9df12ac2808bc24157cf8b157c63b17887. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITZ0X2490602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3210a70bbdf1d143a90119f7d2cd91084cddeddd42671c625be28bae975f111f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITZ0X2590072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203e2d3b737ad65d2770ac6f54e94e79da8a2e4f98e83e94a4fdc58828d80891. 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/ITZ0X2590252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91643fdf5d4c2e5466254bec084073d694d86b0ce6569b0bd507bf3ebf247e9c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:47:19Z), 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/ITZ0X2590488.