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 0xa04bd4c3901efa8aa82f11fcb14d23802d4095901807470c73395181d9d1b5fc. 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/d5b98a1b-c5c4-4409-9777-ef7cebfc293d.json and https://artists.proofprofile.net/proofs/artist/d5b98a1b-c5c4-4409-9777-ef7cebfc293d.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 0x14976779c4d5d22e966822193054bd1054d89b47339d1883aa4b9fe216bd59f6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARF060900712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1fe10e4bea84b403dc52be47a74b0dc601774527b300f7582985f82ba76d53. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF060900715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338c6087e6f7966db98d118f3322a9bb165df31404c6f0d597c729234d3f80c. 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/ARF060900717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dec4f3c54632d35f9c49e79dc56ced814014665b8dd9e2667c78aa217a9958. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ARF060900718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ac4a08d8336d70b172026341be180b28a0366527548b34b8a5293587ba0ca6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF060900721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d1378a806000572e6536a95248288d36397941c56dd652b5da939e8318440e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ARF061201641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01c0346964b99fbe29182baeca9ae9ec9eca42b6eb1a165ae11b387cf923157. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:00:18Z), 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/ARF061201645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049b66ed8c6c529d5c8a53a68cb1459285429eda87331c90b0f0e9846c68bc8a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ARF061201647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce03711ce700ff145bcc1fbc311e7c5d29ed5ccbb7afe17b6dabb124693fd90. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES71G1762312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09734f157cfcbfbb109ee46cf243a4f45aad7dd6759f78f61b4c86bfd3172565. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES71G1762315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe623304cf68e57f620b5e1c5f5b876b3620694fb875930a80f543af1b01d708f. 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/ES71G1762319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14352db1ad7bc67ec1b35fe8f114e1195bb128715895fe106c73d3d8bd727e79. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES71G1762320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cac67ce794ad8eb5a56c1cd4030af81c35d6b76e9d03ddfbbc9bfb09034a82. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:57:52Z), 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/ARHXW2401276.