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 0xacbd0d3a793aa52b6e1795d3d0573562078e424e2e8efb36cd9aa06b7f5230e3. 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/3e1b2445-8d68-4610-b03f-a0fd0a947357.json and https://artists.proofprofile.net/proofs/artist/3e1b2445-8d68-4610-b03f-a0fd0a947357.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 0x847d75975b000f93f7cb25af9e05ca290caefeee0467254fbfdd0abf9fc6f829. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZMEP2184293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf371be01dd1d5394e7e0ffe8a0a351a441a480b73f39cfa0411a4697949b2e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPLS2147852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf371be01dd1d5394e7e0ffe8a0a351a441a480b73f39cfa0411a4697949b2e. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:56:01Z), 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/QZPLS2147852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323f389f9142080fc8f8ca4b8f70da9d289e608dbc244a5a453b25f4560838b8. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZK6P2287287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01875e0eff3da4d35f6b491d657a41ad20e3587944f294790599d23d10604da6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZW9L2229142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01875e0eff3da4d35f6b491d657a41ad20e3587944f294790599d23d10604da6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:49:40Z), 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/QZW9L2229142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090c5af50f2a73c509bf2b55806d44b7a567bb18695f338ee7b5f24dc44683ba. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZGLM2343269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a3baa3941db1546472f85739995cbbc714c85907c70a69d900ef358a98493d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB72321135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f529ac8bad8ab0874a3a9648333d35015908907e257f96fff73c7ec8fc0c7b0. 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/QZ5AB2436208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6073ee10737e287b4b0e2083b362b175be3856ac8905a4019d77464dc441ea4b. 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/QZ5AB2436206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f529ac8bad8ab0874a3a9648333d35015908907e257f96fff73c7ec8fc0c7b0. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZ5AB2436208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f68b1945e03592870a4cb7db2554d4f5cbcb6c65246a8dbafb8236ed2dc1639. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:08:38Z), 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/QZW9L2468928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520efbc7c6dea53a38827ae4308265521dc918180a6db09bcfc8c05a9c48c1d4. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:36:15Z), 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/TCAJX2513407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e992775017c1bd424013f7b2cf62d6bfb4433a9c1caab498ca002fddd78a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAHX2410422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8db1099a9ffed27ae40884bd5aa920fd4c405155f54db8af1c32ec0022444da. 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/QZK6Q2216819.
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