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 0xf7f314ee4576ad4f85671524a611f16278a0d23af8db98cf140443d709b7c7fe. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb34c39f-02a1-4d1f-b8db-f85743f90630.json and https://artists.proofprofile.net/proofs/artist/bb34c39f-02a1-4d1f-b8db-f85743f90630.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 0xd8185954edbade4629be6c108346149b971deef36329568f3b4ba840c1a845ed. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFMG1392962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087f90393203063d64448a0a1d7a8fd33270ad103bd766ead8fdef3f9e78ed42. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMFMG1392968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cea398a110a48ae680c294336ffd7fee233c948120ee2df263a3dce60eef71. 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/QMFMG1392975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb8ee7d8d575c76e6052729e200b922da94693d6b533dd76e1bfd4e7eaeb81c. 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/QMFMG1392977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b257f3cfa798bbc178700876209c4abfdebde889a123e93e49b80f51ca06d52. 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/QMFMG1392978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3fd926704c5239686125c4791c4480da15d855043c391c5c877e7d3f11d68b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMFMG1392963.
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 0x84291f5dd4d4d67ef583610f33cc76f476c954508e0dc4335ef11a95b3e3b044. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QMFMG1392967.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253f429716a0e11ab23c0b33f3492f0a4ddc3d7d938d40ec2802f4ce123b98ae. 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/QM4TW2023613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898e684dcc43a3f150e51fb1df93f979959d15f148fec955d2494da066b0ba48. 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/QM4TW2023620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ed893b4da57e32927d9b954bf9553512686e82489ab77acc1053f24cd95b07. 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/QM4TW2023630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50662cf721daf32903846f599dc08cba8d0358f8534ea66ed4f37dcdc044f063. 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/QM4TW2023641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07029d370f74f3033368dac84260059e7a23a4201b0a46272eef2aace024e29f. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QM4TW2023626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0598be51004cfdcab684b552c990d597ac16d58578b2ccabb1ff313c521f7f. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QM4TW2023640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501b82a27bdd795a7fc897e7bb2da16e633b60604bd2fab9bfbd0471094248b8. 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/LVA109900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf5dbc8cc1219ccc67b6f80d99da3f9ac68a335bf5a8bc9e5b8ce8fabf21e49. 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/LVA100800332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aacbd3ca772b029ab7eb4df786979cee2f64c485ddce4f90ec8b6ffa893893. 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/LVA100600167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d017c21e9d5a5027307eca5f0116f4cd3fc59a07a927a918e9f383e60c3de63. 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/LVA100200293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c59b748fedb80ae3b6870605fb82498bf4ad5e37622bb1a90f04478dc8aff9. 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/LVA100600350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53fd8544b58d647d2e315868c23dd58eab8d77b0c5f318b7155ee1b8cd9acbf. 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/QMBZ91329478.