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 0x6191a2f89a139ff2de3ba619c7922918c7ecdcc2961befddd9e923b899af20cf. 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/8bc806fe-c1e7-4c4b-94c3-73c4ba37fdf0.json and https://artists.proofprofile.net/proofs/artist/8bc806fe-c1e7-4c4b-94c3-73c4ba37fdf0.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 0xd00bbc6ef51c77115a56755d2e0d968d8bcd709aa59c615cc3a1af927970a9b8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCACM1699312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae64c95ec4093071a263aa51997c46393a9a3e863384c9aca880d92df62fc7e. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCACM1699314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bae584b2487587a15e4f7a8e310fbd5d360eaa606bf92457eff1bab131f3e8. 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/TCACM1699315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba7ab75cdd65246ce7420f31dce308d69b409bc04b9a1119a73cf190f00a524. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCACM1699318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa8de78e33d89d9990939d0db79051ee76b33b103e37c61d697e29675f0d0da. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCADA1731349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87daaacd840f5f29ecddaff800b21fbe902c3f3752c3221e43d906be55497a47. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/TCADA1731352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368071a22ae307d0695c55bf9480be44487a5e7aa2cd811b2b438d845d6cff9e. 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/TCADA1731356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2709aee1dc29e0f6305b6efee30df4b19d52e98f8ff3eee722a3e37997ca0f8. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCADN1885389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740178f996d9c08f6d91f07bd8e81ec39d93c09a99a10de05dffed9f3fd414bc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:03:36Z), 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/TCADN1885393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95115379f04ca8d593b278a4a6ca6d24f363bd0987f1dcf65fa735d059d966b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:18:43Z), 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/TCADN1885410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d984330d409472792e73d9ce9076064f0f0bb9ccba0978080894a44321dc0f. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE6I31954440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757830642907fee2a9db9a89a123ad8ce058bd0f7891f84c362c15151dfb8fee. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6I32153666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8b49ef4432259421b4d649a4c8c37647bb741ce9d003782d31915c3aff5f40. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:31Z), 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/SE6SA2135914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6426a72d362e1e7a01143be549784adecd52d626f9f6be0e61e6514057d645e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:21:52Z), 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/SE6TI2156702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972f8bba3734e2a2019ee2c2e4cb9f91fbb14fceb2e95b97c4894aa2c5cbc3ec. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/SE6TI2156703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1daac553f69ef44f80e250aa1933af3f8ecd2d52030d8744e097dce2b323ca7. 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/SE6TI2156704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a346469a259a05848593b467962b03298648de2d3c4b6a8e7ea63deb0f30a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/SE6I32391767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d49603217dfa21c97a2c02938b5fb751f7eb790d22942f797ed3403b8ad65. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/SE6XY2332009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb58d45092414cb3cd2645bc813a1774f4063ca84c2300d6df37e003fdd08ff. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:41:15Z), 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/SE6TI2383071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd090d0ebc1dffdf108023df8eda833f56dac470c94e9e00d1c1cd4792d34047e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:29:32Z), 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/SE66N2356704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276bff48710eb6fed92bcdf129b1ffed187f4532a16dd0f73612676b68e1dd3. 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/SE66N2348661.