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 0x05e952816b7f9c4e34e420a01be028c750ae01d123201dbf92f15750350eeb52. 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/29084dec-5523-40fe-a797-92be68198b08.json and https://artists.proofprofile.net/proofs/artist/29084dec-5523-40fe-a797-92be68198b08.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 0xfce2416bbc445d7b396144156a3bcbb933513791aca074ac3661af37036ba10f. 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/USGC62001078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fbdd0bb4abc557c23c50630dd70dab8818c1ef37c68f37f8d6e018e455ada9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USGC62001098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2312b80ccf2379a759a552dad0225912813b5e7a90edbb1c74c5631ed4ba9a20. 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/QZTV32417072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4c4f63636de17a40fe162a87c32fcec306af6002b1670656425bbe11e31024. 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/QZZEB2499100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963904a2fb80911092266d9e091d4737e4e96255320cb314d04a156697edae15. 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/QZ5FN2542099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ff7dcaad07a9d56e5b25fe62e44bf2cbde6a039d7b8babe8409e07968ecba1. 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/GBRKQ2510349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc7dccab0619bb182d0f7228caebfb4a43829d9b0c5b69c325ec38d47c802fa. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBRKQ2594993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ff7dcaad07a9d56e5b25fe62e44bf2cbde6a039d7b8babe8409e07968ecba1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBRKQ2510349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c9f54071bf8b9c3939d191e72b7606f85a50cfb579e7d0652689aeffa54e38. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:41:45Z), 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/GBRKQ2594981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4c4f63636de17a40fe162a87c32fcec306af6002b1670656425bbe11e31024. 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/QZZEB2499100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc7dccab0619bb182d0f7228caebfb4a43829d9b0c5b69c325ec38d47c802fa. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:41Z), 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/GBRKQ2594993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac3233ed21d73389590233ec21bf17abacef5f777ddcd8f22c5d657e8c5804. 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/GBRKQ2594994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963904a2fb80911092266d9e091d4737e4e96255320cb314d04a156697edae15. 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/QZ5FN2542099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cd913b4976dcd3aed2e76f77e877aee722c97ae76b3150ec2766251b4098ee. 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/GBRKQ2594995.