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 0xcafa98a154895fd28932104ab6964a824be3f4a72f826b990032663796ba8302. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e5b1652-f76e-405f-ba8e-59466b1a3657.json and https://artists.proofprofile.net/proofs/artist/2e5b1652-f76e-405f-ba8e-59466b1a3657.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 0x8c4b5a4234c1302ed18d7fe81ad680b66a5d2cbca9dafc789a90046a6dbeb19b. 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/TRA171100766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130daa2c0d9748e513570d4cb446ac809fae272be678926c05ea23e22bfdae56. 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/TRA171100767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fe7b432e44faf52c935795eebf5dfceee28e600ccaeba6ba8ed433ee2b4d47. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TRA171100768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327b33bd707b7e5470b9e6fa1fd5f3262665078b47bed5e80a41c13c5cd5251b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TRA171100769.
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 0x269cd06ba9eb22089f469e97b3ab87b4bb91189735a4533b337ce9097871b2a0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TRA171100771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0181d665c70ce81f1e66ea3ebb64dd2ea82985cc0f0061f0dbad65634b0ea0f2. 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/TRA171100772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698285fe9bbf7a128d04bcfae338d73c9eff63de557fc87b0d1b3e38da5ae438. 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/QM4TW2140466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8df70798f0522f890a3e3d7368839687114f0cf4c4e59cfec5532c163e6f04. 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/QM4TW2140482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7594bc378fe5ddf8e620316fa5ae88fc3182cb741063ffd6a2f5d5b58a3e7d37. 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/QM4TW2140548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb90e273cf678e028bd88e03edda0d5b7cbef89c5297b980a985cababdd1c7e9. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QM4TW2140440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf27912233ba60ff21bd6df30f7b96ee3d50696b87cc5f7a222483ed24c7a29. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TW2476371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2e2ca268c0930128d33eb7b5f4694b8322a93f9efc814a9efb411f5c08d4d2. 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/USA2B2058461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3a54201f88fe30c1958a928941263caad150128117d4e4e8453ae494adfb98. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA2B2058460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45977b7a838951546cdc288f3e7d7c702f7cbc11638aea2c83b8fecc45b4cefd. 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/QM4TX2149438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1634f978a2831eaf0e531c04f86080b8c2afdc149e8166b90f29d83b84d3887. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USA2B2058464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405ff184d5caa80138cb7062ba67c5be47e37cd8ad1452beaba81bad012c0db6. 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/USA2B2058462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0f7e0497741971b5e0031206f0ebcc94d3bb60181fa85287efd595641e0673. 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/TR8471400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb980c40b7ef01b2470e465e62d8f1582b6580f2b06ce332c6c93953aa062858. 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/USA2B2058466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc062ee78d8ce09667b26b3e68e30fe7d65940e22a5d1afb495e3c42531bfbd. 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/TR8471600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cefab7e0bb12ac4965c6c8057b8beeb9833722138ffb93d624f58b6e908c9e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USA2B2058463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af32e69b941b69a9d92fe844ffac9d4b2d674e1cfc818d97a842e166a280141. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USA2B2058465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b17b5a54ba8723097c577879c00992f643a98f5ccd70db3c5c5fce5b867a6c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USA2B2058467.