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 0x47557f3fd353eae69e09bee6841dc11b5383f658bb431d20803987233741d269. 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/c94c0a93-b5b6-4fbc-a374-ad75d82bcee7.json and https://artists.proofprofile.net/proofs/artist/c94c0a93-b5b6-4fbc-a374-ad75d82bcee7.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 0xde6e42f6a5e3b37011e6c3862ae85b10f93fc2a67949bd435abe9635b2ce4aee. 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/DEPI82324456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae686755c0d12794840ac5f31b9eacbd6b95b300986eace6b2eb1e2ee9f32e68. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEPI82324524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4075adf90d9753d1b3c01126e481cded34a45308a52e947e05e65192d57eca24. 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/DEPI82324520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf90f214ff1f562c9883623b81a9257ac1f1a4d2c7a522a196cf0a92a57dd2ea. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DEPI82324099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e1b06453025c377fbe9e266bfdfe30fb3d7dc9043dcac2d0b32f5c28105a0f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEPI82410457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8713b29f60b62e7a9e56ef248229397a39195556c2677ee37281960800f63e76. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/DEPI82416089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1d72b1389896c3736ef3683d48dd680999699a613ec207b192793947a87911. 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/DEPI82433149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a985487da2662fc21750a446eaf577ec6338bcd82d1a1a40b8c1c746ab137ef. 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/DEPI82437551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4345707954a0ac7d6db01000cb389a008abea9c9b106d4ce1a704939e1c138. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:42:48Z), 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/DEPI82541847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e87d3ca7aa71ba1dbd9b1bd3ba89e4cb0c9d7e59fe662e33a7534b9e8591d3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DE1QW2505987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0669adde63cb9dc429e1d23a11b7b31ea94e47a04fda0b20fe8463193c4886eb. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DE1QW2505988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daabc391f73a4e443f1c97170d27b936f7932cb6ccb2f8d2d211abc6b60c61c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/DE1QW2505990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaca825fae1600afe6960ad3a7b41d68b08c645f0a74645df954093c69709761. 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/DE1QW2505991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5009149da2abf5b11adcb3c82f521c0d2b514a857a4e9f43e3f907113d175f81. 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/DE1QW2505992.