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 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 0x571e1ea668ee215e56908b73b5810fd8a26fa4628ac56e0d0007975b37982075. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9196b65-0dc6-4cb3-8eb6-25d41fd5b732.json and https://artists.proofprofile.net/proofs/artist/d9196b65-0dc6-4cb3-8eb6-25d41fd5b732.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 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 0x401f40151269ab28740f708ed13fe20a1b22455860fe7cc683294867b5a86577. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P2370049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac02f79c53f126daa87a9c61e77ec5c4dead859f5f89f5df6e27c37501b77279. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USX9P2370062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159bc14ede2cac65c7ea5642d19f0c130fef9b3a3a28cf2fc986e4ceecea4ce7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/IL6192001181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102f65c5bf86efdbf0ace6aac63efb4cef990c2f24ca34ebb8666b88831f16b0. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/IL6192000555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5f660ab9628827013aaee053bb3e9c5903a1307e6bf90bf46bae028aa518ef. 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/IL7532421551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd439900c9a29e409e42d9797c823980a1779883cea98c04dfcd6081d0b4e65a0. 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/IL7532421552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad5996d82192d680ccac0f749f3d4f37c0dd18ce689dd75328af988a5098564. 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/IL7532421553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5518e25e48ab80ef8185e4f18c910739f0c14ee6be131ecb495fbf91f1090c. 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/IL7532421554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd644ebc90ce14226397c964901cef73af82dbfb83d2ea36e03f9d92ead41ccd7. 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/IL7532421555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1a36e1a405de0298554a45115774f40e8f366283d1d62c75a79a34e9e6ab40. 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/IL7532421556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e76ef5fb674da753a173b2adfa93a91a6d5dee8ce3e7abce6ce1d5f1b2cacc5. 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/IL7532421557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2214598961379909cf805560047a7127a39ec9e6930fefa25e522c80ab515d. 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/IL7532421558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702abe5d44489f7d02628bb7a1b3b3b0024810bb0c90914d6f1bf932d9a72e0c. 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/IL7532421559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163317f88e16bb1f33afefb40f9629a899447cd4e518bd4066e8bd8d0ce929a3. 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/IL7532421560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dc6fa9c7d9016adacc0775c5fa258e70c2327947391078d681d5f1781f2d51. 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/IL7532421561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1fc0c695c7b85642c1c8e375d60346b1f9593a95861954f9b6996e9ce52e8c. 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/IL7532421562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c26a8633f7ddcbcb88858dfffc5fe0973bcf53d2e7fc56b13a249d0baba0408. 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/IL7532421563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e0000d377e7ee6b78ed837082e06b893255123fd10b09a54a9bc84d3b28dcd. 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/IL7532421564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac3a84b3c5e6cbf779bd4151ee6bf5093c1eea416d7686d36f6ac546f3de111. 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/IL7532421565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357edeaecf0a2f19c21732e6fdb84351e76810694153cea06c649a89041c13c3. 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/IL7532421566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fca2a86dd73256f8a5880216b493be2bf132bbf7687bf8b2b21f2bbe8a9ad7f. 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/IL6192101302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b034be08744cb53f840ace8f71265861ee557a02adce01869b24fd4a93c8909. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IL6192101304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa03bdee5fce805e4d9e2a4625ac2dc4a1573741e98a65c7bc00ddf9e47f64b8. 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/IL6192101305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465683d12def509add6f5704a45f54d54c0b5421cd913a26c9a442715b22213d. 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/IL6192101306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b738abd7a5de36e4862a7335060a96b7b783e0042e7ed93e1b9afac32f08667. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/IL6192101307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cd313e1e70e5c1305db7bd0576d424d1bdf6ac5735d415d2f76bca0226e989. 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/IL6191500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6928ac94b91c0d38087425b6f632f6c10b055e95809da09c4369171e81ef2951. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/IL6191500515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3e7ea9f7a5bd78de6dd84454c862fc51f586ec216d0a3b35d668738e4d8b18. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMFMF2437634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510249605480bc748837d2b92ae0ccd24c705db213f5503db27276024013c1ab. 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/QMFMF2437637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffcc1f642c8c88ace28dd915511c94d3e2467dc520ed47f5c9b5e190a4a51c7. 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/IL6192500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd3e6944ef163436f086f72d0ec65ca648b9ca289e139efc89d1ad18d9a6722. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/IL6192401137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47131ecb0b83ec1b9b5c6f5c323800c480ce0b1e4d72d9dbb4610b3f3c1efc02. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IL6192305500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9208a0de1b86c76a2379eecc40815913945b36dd98d4d075360cd4043482e8e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IL6191901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8ca2dfbf7c2fca5c7237a4375a516a8a01abfc67dcb0aa6bf780f57be79814. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZHN72543571.