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 0xa54b7119bbef8cc0addbf7f4e3346a9f86a703ab087e4f4892474771f1509539. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/229422e8-b1d9-4ed8-80ab-086090f9ddcc.json and https://artists.proofprofile.net/proofs/artist/229422e8-b1d9-4ed8-80ab-086090f9ddcc.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 0x6b94ac2647f81a0f86203002915b8d70de5087741c7d67ab150e5a0b6fcc7967. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGJ2213132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5775ff013cb139c4b53406e2d51bacd3daf4048bae87eb7f09795d8d42d3a063. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAHE2308176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01115c4d3a6f7df002abc0e437f2198a9da485978660092beb06bd18675da4d. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAHF2311403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b7f8322efa6865372c55ffd7488b1f83773b9c347bb3a1d4c4743b70c8e2cb. 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/TCAJK2529283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3da6fde68dae86a5990e14a1a1b614070a051c7f8a90c8063955809b4e74fd. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAJK2529320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fa0b42be4b7287efe1d22971db7c623bbdec18ddbad4c1f1e862d25454c34d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAJK2529357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91f7df77ba8b8716d11b9045b4167b57a6f94d7538ddb628b9592928a33ed4. 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/TCAJK2529382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c7005173e36fa7e8cf7d915087d0f690bfd95012cf6916b81d2a127dd53425. 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/TCAJK2529455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3161ecbcfb6f2adce5653f89492de38bedd418083d8b143424beafbdee0fe63. 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/TCAJK2529579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666a0e9de52e3524be8eabab1afe84d206a04bbb135ad6e782b91641733e60ea. 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/TCAJK2529606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f71844d9267d02c5de4874a2b7e0bceb671106775973e2b82439fb588e368e4. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJL2529665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa71214b80f57fd3b9c7703e8e394250357d5dd401c91e4e6746eb6868ad300. 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/TCAJK2529680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa91305bb2e85d419bd6b86a238593517c3553aac438455b1a52a097c5f69b8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAJK2529699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f47438883b4cf65d210055011a4bb2537e7ccd1cb42ecc595a921394a910b50. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJK2529717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed52c5c4cf945807dec5cc0d5be49317e846f18567b631f436d0eea64974b1a. 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/TCAJK2529730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d5754dd7579e1e4cbf3e3af3a15d32c8e3898cf8f541daf610911b7fb2854d. 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/TCAJL2529737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc37248fbb8917beeb7e9135056553d6a56b988e794fcffafaa1a32644fc186e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJK2529758.