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 0xf8481ba801d8c15ef8067d87e8a598970f99c3eec25ec1912acb3d8bbb14a361. 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/02683583-6551-4545-bc5f-4e50ac6b6aa1.json and https://artists.proofprofile.net/proofs/artist/02683583-6551-4545-bc5f-4e50ac6b6aa1.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 0x5ff96b38712eb5be636fb1fdff235ae7057d5b2abc062e4f46ce17d6a1b5cf12. 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/BREQP2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6ba0595d1d4c670a926328745ee9b86ee9cf29f4bd01cf7798c2da816198cf. 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/BXD3Q2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2ab06a53e5a6bb11e5f614438c1387a60fa6776840b39de883b27ec4fc8a56. 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/BXD3Q2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4731ccf4f6361d719c430151f75dc67c6516427dfb9106c85ccff2e4f1093bd3. 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/BXD3Q2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf53011b239cfaf0213fdb2f0396910ad32dab681cb7d367b63953bb7b8b196. 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/BREQP1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff971f6bd6b5feecd86bbe97f51957b012ee693bb7a2e0e305ebe126e618962a. 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/BREQP2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc926719fc51324cbc428cd3a2c1398b75e5817c44fc1fedbf41eed83c56c0c55. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BREQP2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835785d597d59cd7520360cc3c9327fd061b8df4ce4c335617c0c7b5ca7f50c0. 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/BRRGE1805076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c0f8b3cca1c861768a60bf6c990865523714cd6f874bc39b6fc7038faaa20f. 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/BRRGE1902566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39685050e3e586fd4c9aca0c2ee9b59d4c4826f19a7f34c6eace4da7697c280. 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/BRRGE1911305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b93f7e79873edb76e3049095ad4f4b9c4744fb015b6214a7e6c182f522c567. 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/BRRGE1909876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227a231d75f30a1a95676b8e46b13317595f31a889b3e68e20c2dcc77ef8f315. 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/BRRGE1902568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c5a02a9699b5c877a40a63139b8e637043ec28fcd87c44c8935f8967aa8edb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRRGE1911308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1316362bf9d10a4803b20291e4f6f587754511d92851eada0f9940aea262cebf. 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/BRLQ92500003.