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 0x75abe54c23e2dbf293a0aa0e532e64afbafebe49453af801345fe54bee943493. 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/209e4c4c-1b36-44fa-bc35-240754a9412b.json and https://artists.proofprofile.net/proofs/artist/209e4c4c-1b36-44fa-bc35-240754a9412b.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 0xc45cf020de0dfcb403236e4461e48907c82533338581681c14c738aca63fc4ac. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTB72376183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd97f08f92b20d5f332a467b8732186c68c492d2ad44cb55e2d1ae76cd447d5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEYW82409210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477428070320dce353c1c697034d40d54723a9cf6f4c43c6c39ff739f2908c7e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEYW82411739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69f23d56befdd3fb241ee0d9b0d1946d3dc8550cfe3a273c7c3d51c3c5dfdb6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEYW82418573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f891f2f13a83cafa22bc42584e36477e8b480917b533f7eae39742684cf34b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEYW82419744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68685754e9587c34ba7b6b7cb57890e0778fa21419e816b33209d21f60c66ca2. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/DEYW82500365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8337e4a88e0767d9eb688fa5873fd1feaebaae39af97147fb4fb5473e83d850f. 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/DEYW82501042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1ea93a3dc7df5130054844a64ef455a3d88e986404218fe5f8e7c3c5b9dc27. 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/DEYW82501049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23ef44cba312936854ec021ceb2b33483e8fdda8b8806f75955f0ead80586b1. 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/DEYW82502066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe8016f13501b58eee33c67e16c0a160faa0704454b888b598f02f72679f9ba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEYW82502593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a644e5e7a64ad441581987d278996844ccbd4d1b3cf95bcee8eab71d60c8e13. 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/DEYW82503807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab1bd39bb31b01dbcf88c63d5246603fc9ccba45df962edc9af0acf7a1a126d. 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/DEYW82502859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fdcf72e1039df1de60959dd1cff83127ba80ec85ae9fa7b1ad3f9eb0703886. 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/DEYW82503547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c8affde7eee46befe2a393945a5aef910fd09089fd12c23c29157aa713d840. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEYW82504962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77749832ccb8640469c6fc684f4bc4d83781e8f14035b73072fd871401b58263. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEYW82505769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21c10c52f9f827eb12ee843173c9d74b6f330d91f15f49dd23de8f2dfc270b2. 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/DEYW82505291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7058c9bd1709eb08c98057dab2fb277f96859fbe6a60590b112c819cb3a82. 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/DEYW82506524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1682ec6ed7180775fcde590bcb5608f627f039db5b99aa2596e83b1e4d9f57e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEYW82505284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e097509a858308d22355d3d77641c7f334cfaedae28773d943215e9a0098fb. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T07:59:39Z), 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/DEYW82505461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b08ce6b07e8b03c30c2b4bdc94dcdbe9526935a95786aa897fc71100fdbb805. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:50:43Z), 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/DEYW82505458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc689b7ed92e8dc635336eef386a084197286d38c4a2d1ca07da8baf9292efb4d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEYW82506511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9e5546c11319243ba8934a81ed4c8a5b4f4fc84dddf2632ef147a5db6b99b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:56:37Z), 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/DEYW82508095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d020d07ca823fe8808f21a9f1cc45eec359f76f2be6473b29986ae0d12fe4f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEYW82512074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d273fb4e78fb31c5e325d2748591e00fda33e8e5b151f89889c185b2fd47673. 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/DEYW82512475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed4887bbada2e315aa0e95e4e8e26a9f6b1ac8c5a5ab188c42db5204208ddbb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:37:23Z), 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/DEYW82515472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bbad61c639513bec055cd2498dab53e427fc2b806beae263ace67e590d311b. 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/ATR981236754.