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 0x0a8d0d4031e52f946a51d9ed0aec85a0f586af94e6c317ce2e9bba0e4e6038b6. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52e6cebf-d6de-4856-a01f-1f2a8ea052c4.json and https://artists.proofprofile.net/proofs/artist/52e6cebf-d6de-4856-a01f-1f2a8ea052c4.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 0xec1257c2c02cd851e5a26988253a0df17ee19491189c3259bfcf8f97393818ae. 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/QZWFN2523028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228df5b9d40dc5b3101b00a045d91668c251f792e4a591bd3fccf5a850fa91e4. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFN2523029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b093d60cff98c0aea0fa75621db6c85d25efaafe912cfc2570102f93e879a5f. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZWFN2523030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74934509c755d805446fd155b1afa11cbc0127add028c5e7ce19b26efe9f80e8. 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/QZWFN2523031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce3ad0b78218ab41c6c99c353139be1f934bd196f404a7750c16151fbb5a93. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZWFN2523032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f22e6d944f1de340fd87c227132241e4d24c446dafd4dd4b61241f81fc794. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFN2523033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d367b6679ab595fd0db50c593894c56291d2790afe310b47df3c13d40bc7ed5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFN2523034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0615db4e10175915812267a0bfc4364b79d2b60c90b4a07cfb6d9a4ca6f131. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFN2523035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228df5b9d40dc5b3101b00a045d91668c251f792e4a591bd3fccf5a850fa91e4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFN2523029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b093d60cff98c0aea0fa75621db6c85d25efaafe912cfc2570102f93e879a5f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFN2523030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74934509c755d805446fd155b1afa11cbc0127add028c5e7ce19b26efe9f80e8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFN2523031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce3ad0b78218ab41c6c99c353139be1f934bd196f404a7750c16151fbb5a93. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFN2523032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f22e6d944f1de340fd87c227132241e4d24c446dafd4dd4b61241f81fc794. 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/QZWFN2523033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d367b6679ab595fd0db50c593894c56291d2790afe310b47df3c13d40bc7ed5. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZWFN2523034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0615db4e10175915812267a0bfc4364b79d2b60c90b4a07cfb6d9a4ca6f131. 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/QZWFN2523035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6988073a5c4b23c653b313e3a94ef1d5346e629785b7cd45d61227bc894a05. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFU2585326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd06c291a7aff82e28c54d928998fc977a16fff9e0ec4f8ea1a67f46938e169. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFU2585327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c04f2949253868953958e677e03cd1f341bf147505e9480c9465779c9b39a3. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFU2585328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78278251b990049f3b156355d0aa2ef5692cb56fb021b9fb872221507c104abd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZWFU2585329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5c2d410a1dbfbe743724bc22278b3f105e23566b6381bd532d8facbea821df. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZZ7T2584344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60d09754aad62430404a34a0c4f619999b80c08da920a845ea6a175508044c0. 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/QZZ7X2526936.