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 0xbdf99f92f32ac26d4f5754304d40616a91d6dea01af5484228de96aee9bae230. 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/d8854d4c-1ad1-4d25-a5c2-c0147c65ae73.json and https://artists.proofprofile.net/proofs/artist/d8854d4c-1ad1-4d25-a5c2-c0147c65ae73.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 0x1fc0e9ab301eea9f44261164b9116fbbaf5c555aeed27ec408be089f0399f5aa. 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/PLJ921900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc60f0db37c2a890f90111d8b874b69eef5856391251cc11e9d0312aa54bcae3. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/PLJ921900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fec7bb19703120e5095294b5408c0d5f3271476ec4588a3bfa23ba2b9fc32d. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:37:39Z), 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/PLJ921900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72d3e22dcec1ad3fdfa1806965fdbe113bb5221f184e7c906e507c849182b91. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PLJ921900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0541c2e7462dd32e3fd3fbe04d92c717eae0e48c9c2d3a7b66986852084b1a1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLJ922000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffcca58973fb89cb5caf50725e0bd4ee9fce0a8201ab679b46b587385880cb2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLJ922000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd135b791d5dfd84f719a8b881bf8992b726f16614b6988aabe1919ffffeec082. 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/PLJ922000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a90a96a44000cb81109afe0b7424d7c436a539a5d2bf9283638c894b7a3c0a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:53:32Z), 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/PLR862100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4d771a3a13f90b7f85a12a90b45f423bcd8c63020263d382670daa82e1903f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLR862100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e7249ac6084431ffc1e5d9da491713dce62304839d8c1e3e0df13ec2f8540c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:39:10Z), 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/PLR862100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35658b3971538603eba53dac5e1d3187ecb2b1568d4d02ae2001e9d8601b7b3c. 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/PLR862100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27650f3cfc7580796b46ce11940b87dc4fa707988065f70a64df7deaf5242df. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLR862100299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253f69c693015d2e259bc0055458158c69d05e78a8b0280b205987331d0d599d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/PLR862100436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc105663b32f5e6ab0c422272f0688f4b6ab400086ac5e788d2c36d39cedc935f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLR862200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51cf7529c12aea112afe9aae80b49df174f4c7480395732cc4aece1e8371234. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/PLR862200134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b22e9941446df4d4cd17bbfe00e88ebcb487a8dbcd9e0b78bb7667186bfd38. 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/PLR862200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bbd1ee064acc1d04700965b88b18f6c33c5e9f58ded189227c908418cce5bd. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/PLC062230823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c757235204dbd065e137013942c2bddbade2db56d023691d8e9f9d92ebdf07. 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/PLC062235668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082337b7ccb5d8835944166c790a06cf344c475315114c0493df977819305b68. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/PLC062394752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf983f1e49fc49bc0369771516baedc3f1087166f06f13c503a81c9632248be3. 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/PLC062400613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5520fedc589602e1f3681a9aee023ec159a1d288595eb3c6aa441f8e02f93e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:54:30Z), 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/PLC062425869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3861f6eb260954b73caa4c27bf1be4f33a2f9ed77ff4078887c5ae98cfa4ed2c. 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/PL4K02512880.