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 0x6a0620690c050230fed52ae51a3b33725c1699dad21a03a61f661ef7a9af9a08. 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/44c1101d-edf4-4f9a-81a6-fc35a8d79265.json and https://artists.proofprofile.net/proofs/artist/44c1101d-edf4-4f9a-81a6-fc35a8d79265.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 0xee1f5922905f4a675c25b05e9893d81a41cf6bc06222b24d2d6ecfe844244387. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKC371705008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e2a579a06d40b8eab8f56a5222cc7df22d2416094c447843f5ac9bdf7bdf27. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKC371705009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca905ad974a3dfab66604e38fb2a42d5935f45ae2ad44b4f12aee500f5288c2e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKC371705010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dbaabf317fdbae09b0c1aeffeefb54292ffe56eea95a8b08e37284be3ef0dc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKC371705011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9dd90ff85da1256ad990e8048cd9eef6102172b0fa00bd3e180c7abd0adaa6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKC371705012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e956bbd6d8bb8c484bdf97d08510c8cd6f2a815f9be6466916750193ae0ea2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:17:17Z), 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/HKC371705013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe37ef17ef0ffa73d6dc9b330269dc801a5a52bcf978c0ec38630855917f469. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKC371705014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b78979c191ea093fe6d8eebdb62d582fedf6f328943f0ffcf7aa9ca19eda725. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKC371705015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55809e24c3fda0eebceedf9ae97fc7493d4a91ddff05991158d2128e9be0028. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKC371705016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4502d2fe611f7bb5f539703dd2e656304e6f06b4a380f62a502fdcd70a244e67. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKC371705017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfaf270056b773316f533a0a2b080fe2d5c0592c93451de68baa735600d4b782. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKC371705018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4f8d76d20b9f1e7953a65b6bca797179bff347f44ea8d6a7a4c4b8eff9de26. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKC371705019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9063b0cf949fff169669a8e212882e22363e8dc79418903a7622680de829c9f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKC371705020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95d7a0b0aecdfe738645fa7e89d4f35d5ba07f20554b7a97d5c276d2fbf81a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKC371705021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659fb791d08bbb33cd50126e2ae5081fb98da528a3d4f62b4184ab9681c2f1d7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKC371705022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9b67253b75d117492c196ac434c9bcdf7d17f2e793f539c4846002ac2c3c0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKC371705023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629df10f46c2959a2bcb3b88a58be1013e302724ab5b6c02021b90a75040bb5e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKC371705029.