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 0x29cb0d4e28accfba67abbb66d9dc132e57664deae2bf08aaaac1dc4c514163ba. 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/7dce0b84-afd8-4163-9954-5a0ab884f688.json and https://artists.proofprofile.net/proofs/artist/7dce0b84-afd8-4163-9954-5a0ab884f688.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 0xe1129800cc8d8384d4accf1355e75ce51c4bf616049432445dd040cf57a6196b. 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/ARG991004005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90331ed98d29ac6a5fc4cc894c0b797b21cba919b8c1afca0c8d4ee91d627b3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/ARF100300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa259198db8d728ab0a80cf6fcbb1d1e5faeeb90242857422f56f9e61b112052c. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/ARF109901744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81dfedf01e587b751e1a381e6a43e36155ae154be53f8e4ca6c5fe2cd8f3849. 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/ARF109901748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12f30ca565087bfe67b3b68b05c93e97dd7dbc9bb8c67a0eb4ec4d26b2c5246. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:50:24Z), 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/ARF100300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda5e13e5adeb04a57384ba267ffb479d20185b8625266b477c27e4b07e34bf6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ARF100300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c21f5a66c3340c67beb886be3c55cd5d0fdd9682d3966124bdd18ad981e988e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARF109903051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad777a19a982646f42dc66e528a4ffd3d910d66fdda6ac0d02a27ba1d495620b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ARF109903053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa259198db8d728ab0a80cf6fcbb1d1e5faeeb90242857422f56f9e61b112052c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:39Z), 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/ARF109901744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81dfedf01e587b751e1a381e6a43e36155ae154be53f8e4ca6c5fe2cd8f3849. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARF109901748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12f30ca565087bfe67b3b68b05c93e97dd7dbc9bb8c67a0eb4ec4d26b2c5246. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:43Z), 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/ARF100300387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf260a2c05d563c53da2dc4f5f125c94410ea8d01f18cab546953ea2a863d7c93. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF100300388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda5e13e5adeb04a57384ba267ffb479d20185b8625266b477c27e4b07e34bf6. 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/ARF100300393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c315e57ae106d182f0bbac6d6251fbe4c95d22af193adeebc09baeb61e9a1b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF100300399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258b0267f9e99c6c9f95a0d0d8e8a45dceac84d5b5231e9bb7f2dfeaae27c337. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARF100300400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347e5ae3bd52f1213256ae44ad6e5a4cfc1154754b187962bc4646c2a4f0baa0. 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/ART440900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1614dd7a48223859f06a94ba555d5f77f3b14c348d814d7e6c5b2ab587afd175. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARG991021534.
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 0xd50a869e7f7cfca5064b57313864005ede378f2e667beac1f824a01c547f35f5. 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/ARG990901754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8684dd58abf896e23374bff9f1b282b6e7c35f16fece231b774b42003f965e75. 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/USCHR1312842.