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 0x8628b016d5a47f876e12c44c60ab6a2977127fe4729c1088cc9b5df9b8d616fa. 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/37e1392a-eb55-46b6-9a92-24cea23b5192.json and https://artists.proofprofile.net/proofs/artist/37e1392a-eb55-46b6-9a92-24cea23b5192.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 0x1d9802250d98880c195bfc5c69bd0e5fd024e2cff3af12cfccfc0b3621be491c. 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/NL77T2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9802250d98880c195bfc5c69bd0e5fd024e2cff3af12cfccfc0b3621be491c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NL77T2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f83638c2f5cb27449f61d46c9a0df6a52146a0abc83ad3b6b8ad29deeebc80. 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/NL77T2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f83638c2f5cb27449f61d46c9a0df6a52146a0abc83ad3b6b8ad29deeebc80. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL77T2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9802250d98880c195bfc5c69bd0e5fd024e2cff3af12cfccfc0b3621be491c. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NL77T2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adb13006d818c580f4aa70c5c33f0f2965c18c947f7844b4d761f9cb9cb6d3f. 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/NL77T2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdca09c7308a2b0a7f52eaacc5915314d4f6cf08f0bb587e72fda1edb795919. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL77T2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a57a8fa6b9b7b7d79fce78ab211e3da56c27831409627fa73ac5f91793ba15. 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/NL5WB2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38825b970e8e8b9c1645eb59b8f15f8c73ab61c85f12bbd5fe07efc4c98bf622. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL5WB2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59273cfe86d1399bbae583a409c5aceb6b09590f770d17c2a329caaedb5cd62c. 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/NL5WB2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a57a8fa6b9b7b7d79fce78ab211e3da56c27831409627fa73ac5f91793ba15. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL5WB2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59273cfe86d1399bbae583a409c5aceb6b09590f770d17c2a329caaedb5cd62c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL5WB2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71aeaaebe6345446d6702ac20571e7a0fd774cd1b43f51d63716dfaed7df73a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL5WB2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e21c99008697e9ac5db844a4d6829684fec12863d3bf982e394d3967cc10271. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL5WB2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190342e77ba906b5cea4d4942ad0f53c97e6b4113b0db4d0c2cf6840ca35e58f. 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/FR96X2430062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66cc9a6302c6bba9f3ddeb327effabb5fe2a44373715c0a06734756a7aba940. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:43Z), 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/FR96X2517918.