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 0xadd438384612db55a61f43692509f9d3d5c42ee36fa0ae5bcd93ef047fa3ffcf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7de895f-d5a1-4aeb-9f37-509888e18202.json and https://artists.proofprofile.net/proofs/artist/a7de895f-d5a1-4aeb-9f37-509888e18202.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 0x942a052fa5adeaed1d8fe2c3c2d4ecddca543fab99ac07119053fa6894c209bd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:57:43Z), 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/TCAJE2572123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0d23214aaea5ba107b80e13c4dd7274ee2a880e7a090fd3b68951906ddcde6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJE2572131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c47aa0b6b0b534e377f198271d820bad8d66a615887d32b0089a66ff4a3c86. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJE2572139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b128a8713681f2c6860c37d184ed2ec2a89cc50757e7f33bab412991a83522. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJE2572141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5798439db7ab8fb5c4b671a8c38f9de51b4bd354538a18efa1c9546ebc6ef2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJE2572143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd95b3842d7fa4db78335d259d6c590539b006264115553bbfa6a870091ae220. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAJE2572145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86852c5ba0a4382e5858334704aab9c4a4fe7704c70fc51a4ede174c7165b8f5. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJE2572148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9100c2a402f8e3123577636ccc327231b7cf55d754550dfcf2ed79ab2de5659d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAJE2572153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5217859dc4d0858d67109e2c2096b00ab7641bbbb29ecb8b69df930a2d62cde0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:17Z), 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/TCAJE2572154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1efd567251fb638f5be75896fca76cc8a1a9992d42c5f58fe304782724dab2. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:15:20Z), 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/TCAJE2572160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2a1b6d0d0dcaf778caf4ad4c6d398644d49a8341c07da3945ad146586e9c55. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJE2572173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3231342e32540cb066ce103ae8c375a30f3146d38df93cd9b59d99893f1d28. 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/TCAJE2572180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a39185052cd169382edc126d1e548ca8da35dfe74df8353004d9969a1c614ad. 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/TCAJE2572192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1715535cca46290bb9a6ab57d6a110cfd04d0dd56122905ca0b850cb869a81. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJH2528603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43eb5119b1bd9f9b179d68d75b9c535d3bbbc27258142b6eac63e560e52c994. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAJH2528624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a4279d7ee75ebf701b0364809823343292de9afbe7935e07611db4643cbc6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJI2528633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf237b824ac33726d802b48560226be94d362400e27ee82f04fb0a8aa8eec027f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJI2528642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b19fdd662a4d30682e52d6ce5e34564f8d1f08a33e7a53d0a4515be9f028f1d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJH2528681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abb7c8f7087ef9935426391d2dae0285560e4d37bfd1ee91a5dcf662801a2bb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJH2528687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf641b565831802cc09d9b326f791fb3e051380983aee86f72aebf072beb1de66. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAJH2528690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ef8e17c1446bbd8c1f014785396c67cebc54e7db5ea5725fca69406c2c5e5b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:25:22Z), 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/TCAJH2528733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b2b7893f85c6b205bd008565be5cfc867c58b9855c7e5a542fa992ea34ebcf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:34:40Z), 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/TCAJH2528739.