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 0xa236d84c47ddb5ddc6a41c31c7adafc0ee6bded246963b7188eb4ccf53331027. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c669176-3234-43d1-a10e-4c81e60d6a31.json and https://artists.proofprofile.net/proofs/artist/8c669176-3234-43d1-a10e-4c81e60d6a31.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 0x6e319f58824ccb585a52a5d32da085dc27e6a2b2415cc31a2b9c1ea34af874c2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ62100591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b2ce73a891172205c17526b61d967274c1816358aef0b1f4fa51d9c5b90e65. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHZ62100592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180cc5e34eb0a43a0f6fd4c778ea7b4422b2aa8ed630cce538cd8c63a7086c44. 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/QZHZ62100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e363a0af332ae94d72c16f78ecf9d52ef2fa7df462124f12b5f29e55aec0544. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:42:20Z), 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/QZHZ62100594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc981e9fe804be2a5550b18f79f9d4a98541696945a170982e2e457e741c919e5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHZ62100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44819cff62f16f049a01cb4226cdd04a239f5589ac41667df30459d3cda223a1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHZ62100596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb366e21b83fd24566bc9cfef9b0082a9440657ae6b9cce92ebe7ac2de97bf44f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHZ62100598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0ff06f5e0cf050110a865023062320c565fe4b5229d1ca5ef184c0255898f8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHZ62100599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f41d554a2c4192fceb6203625a9ec274bf36b8012c0f93b6dd2768ab468ba67. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZWDW2410020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4f1bc250da7c856873956021e13021c26cf6f4d02dee47ead0ac3e78ec3af9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZWDW2410021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082d7e5b02f32b1254aff08b10b764eb5810d51124cc7f0b4b4777c6567a3250. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZWDW2410024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8488937b39bff7770b8250f5967705758a58b6538cb390f8e8115f4c5d4a3458. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:24:06Z), 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/QZWDW2410014.