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 0x73fb686afe207bf13e2287a7f5fa59abab3bb0518eb23fe38cd564c1d333001b. 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/ef280c3f-38cf-4744-85ff-a79b4ecc0f42.json and https://artists.proofprofile.net/proofs/artist/ef280c3f-38cf-4744-85ff-a79b4ecc0f42.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 0xebe64b044343432140d44caca59290cec3498e0352b575cb57ef9e3a786353f6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USHM21136833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7fba4338cda2030020faaa49bc575502ba06b235a975d53df6af96bc8b1558. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USHM21136843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce541af65956ea71bc714048490866313cc76ff392f6ea10072e0f4b60b5f3bf. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USHM21136845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce06ce762d86208ab3b32f5fe2840efeca1e6ab673de6a0ae59b7519aca5c52. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR10S1470841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731e8ef9ee506ff37a88cf62afbc1e1605cf4f9cb6d72008886bf1cd98352af1. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/FR10S1470845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c9c4361412da56a58ecdc3cc732163f6e851113e0a33bfa88f338b29c92fc. 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/FR10S1470848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef274d74bc2154f6f0682daa37b160783fc1c9bd971d9eaf82295bee98e4b02b. 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/FR10S1470849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacede1ee22d9607fbced40aaf74b970b5f948b0996b26afbf58ba2dde6d826c2. 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/FR10S1470851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca16426be1456ce2d694929e515b66ff71430d80e26fad295a841ea4c73bde3e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR10S1470852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0a73f0d550538c91fc23f932e93c5f23114f47f6a50ab37c0d0e8c610fd17d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:07:24Z), 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/FR10S1470853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ad0808e801cf0f35b18087a66d160bcc2e0f4b7ef688d077e0113dd8e0a18. 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/CH6541731123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a6f78b47f3056b367844841063eb68ce0873e2b9569b484a0fcc1794cd0b52. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:36:37Z), 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/FR2X41713804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c5969832d07db5d748bbc2d2088572ab6db48a08daadb24aea17dc7b4564e0. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR9W11810589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2bad7b902cad8e98300e43a6408599bcad38a4e14ea06ec2a9139e8ac32124. 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/FR9W11810590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0559a694e3e8b4981e924c6caa7164ae19a8eceb2b3def34666410be489cc791. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR9W11810592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3450148e124553794d7d81646118ebfe04131bff4b28540363dc8bc65193fb4. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:52Z), 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/FRX201658701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8f47b3a766cfb42c8c375e25112d014ddf5f5d691bf609def1072bb01eb958. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FR9W11810593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1707bb8920f8a4e14353bbd7d73f8e9d1327b54e9a0eb8450b87eb5d8b36c7. 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/FR9W11810595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59df65f2836b32c10b7d3f8ffc401ff99b4782c30a2559279ba92b594bbaea50. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FR9W11810596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20a19ec6f1a350a1e8ddbe3d575e3c4029f2e147b157faf682a75a0207ec7ba. 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/FR9W11810599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2023e6558c67633037b71d84a75cbb2f157c752b54a4113e15b5e3c52721126b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:22:28Z), 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/FR9W11810600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e432ba6d79b101a312d75c79644b3bc9d6c4489ea8ab64dd77d8bd801248ed. 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/FR96X1902148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8aa90c43b94161c984985553e2c107fad572d10e9d5563f5d0203f227c38b0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH6542312652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae2e32c00b54571fc7bf491079686576d920c76b98ee2ba50d1ed89f646ebba. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/CH6542325280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf15dd57b7812ba3c69ead4e55a9f0f27d99b3b0b119b73b66c2fd0e79d1cc1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH6542437184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61334d0e521ceab8bdcc1f8b1d7e4a79ddf7d546791870ade08c05d9d0a59b6e. 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/CH6542441504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1450ce153808f6c52f317dc33b58577c3cf36164d4b973d420497414d68928. 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/USUYG1369230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b39e326fbc3fce0b8b81e476eaf66ff75d24eae11041c74c9ae1b1052840db7. 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/FR6F31641480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd13e037c75608ecb6c3b549a7e0166813bb07a179ffba418f75512263b5107. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/FR6F31641460.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84aaa22142653d1c17231ecd1e900bd9805782f24e81ea3839cbfb7a2ab530f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR6F31641650.