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 0x76b38c985b0ca6f2660e64abb824ff46cad99115574502931f7f3fb0453b4796. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8971c4be-8a46-4fee-a59a-3f9a2460699f.json and https://artists.proofprofile.net/proofs/artist/8971c4be-8a46-4fee-a59a-3f9a2460699f.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 0x43a0eb32a0d744a0ccc38bec8435843cd6bd8d1d5958d17dd391d20a8a7e9433. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/MX2832319019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686a85306a718d4cc0eb73609fb5ddcb5c2caf616d5cdaa3f85f1dd4c1a69cbc. 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/MX2832319022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa498f740967b072717b2fd463d0b3572221a43acea48a49951a2a0c1dfb1646a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/MX2832319023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ea97dc9154786b73dfa26bac5fccb4bf30e46fef6aa949ad1dd31e51120674. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/MX2832319021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544d6c0f8d52014d377632bed6ef2e83a0bc68219586f06269d127134e0d9383. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/MX2832319020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3991f6399b9bd4598a5f24c99e6ac0fce55cbfd41eb6f3bd09412f74f72d1b. 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/MX2832319017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f72e4bf5246b396fb2eb38eb4dd23fde68c71ecd8dfa6e99121e95346bb6a3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MX2832319428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9a0ea30d589c11dd8af40c9fc071a785c7f934b36fb71972fe3c6efb9f2955. 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/MX2832563391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc405557091800582d822f90a62a9dde66afaf2b73b2dc81029c28fade24a09aa. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/MX2832563392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbefb7f2695a108f6e4f9e013e9e5e4e4a2630436c613af4cb65d7d8109628b6. 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/MX2832563396.