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 0xa1be108825f01631aece8af42eeb514b47459b4e2436ed2cfcc7e6f1430cfc8a. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31dd70a4-d366-4ce8-a6fd-b042b8341d82.json and https://artists.proofprofile.net/proofs/artist/31dd70a4-d366-4ce8-a6fd-b042b8341d82.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 0xec247c38898f46990b4bb4decfabb53ffb55322d49dfbe2504ea29c0c4fa5be0. 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/QZTPX2391511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c150449545dcf26ab5e0fe3de052ca738a74317b1887d7aa908c51a01cc82d0. 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/QZTPX2391515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7553a3f2428e16cc85654023d4531249fe6972b4a3ed2a2d957a96d6c5ebdb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTPX2391509.
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 0xbec1a67463a4b2fa0ba387dee01007a2e2d2b9f1a9662973f5a066227a7b9d1b. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZTPX2391510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212b74e6a09f8d54b395f3d81442c74980cd19e9305b717de024af09ae527d2b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZTPX2391512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bd23aabe9f261c05977ff2390ac6c31b8c82fec33e1704da2f95f3928d2e18. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTPX2391513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432238c4375920775c6829dda35514b15d558479a67999743bb8af206d447372. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTPX2391514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1f235bcc207e336595c55726853dbf6cccfcb9efd8e52dd01c89aaf2b9dc31. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTPX2391516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a91dce8161d44d56a645e34df695f3aa4255b2500382ce21e6f349b05ef29b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTPX2391517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e23b956efaef85a3b53180a33e5abe3e3a2c63922d74fb1c63079b01e15875. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZTPX2391518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71db0dd1df77a6e252bd46496cb0daa372e3f8fc0a96ceb6ef23bb0a1f6c2592. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZTPX2391519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f8c26b2e59f67b505554befc6c11ab886e58ff77b0d2b08748965afbb5b985. 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/QZHZ62243800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3710eb61d300573d470fde285008867db772927ffd9b6a5cd0e441e7e7641d2. 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/QZNJX2108595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43317833b6b7ba79827f64bd547ce7ae305bddd9f84c6c776fddb091845e06ff. 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/QZHZ52109027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b45469ad90b36157c0c3eccf9939f61040aa451504007219b4acd7a4c73b33. 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/QZHZ42002760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783d59f24f1d9aae0932c7da625c22b4844ff2c96b46d778ab3a1e40d10c05b4. 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/QZHZ42002761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbbe1e826df30c07ced43800d18d4fdd599005b993bbaedc91437de70f97c61. 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/QZHZ51962295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b7488761c2b7d13ee8302ce431bbf35a7d4ff2c026da74985fa03a5ed26006. 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/QZHZ51962296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04954444cf24eb89762e0fd5c97db727d123a47361b93339edc7cf44f7660c42. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHZ51962294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17147c217685580cf895156de9b56be9791534b0d3ffce4e627ab0ca4afffae0. 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/US7VG1836583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5894dd45eec897f59ebd8412f4cd53247a557719d4d455e0acb84cec078de09. 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/US7VG1836584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240111bbd11017cc622a9bbcb737c1d64b5a972fa24104402020b99e0dea31fe. 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/US7VG1846755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef72b0ac57042657c8a9f0073ccbd42de1c3f2eb1bb34e83c75f94fb03e6ca9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US7VG1846754.