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 0xc275f5f3c6db76738bbd7e9e8e245e976048f814fba3d8b2576abf7fbccb15ee. 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/736aeff1-280e-4422-b1b6-5d667f7ba2ed.json and https://artists.proofprofile.net/proofs/artist/736aeff1-280e-4422-b1b6-5d667f7ba2ed.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 0x6a4058ed25152c76c86ed932845fb8bc30f9d5a3e1d273ea82d8e88e483c3798. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:57Z), 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/MYEM18300125.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a56c4e14b1f7afa45766dc520bb44e24948ceadfd81ce35973e321d390f04c. 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/MYEM18500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f1fdf92a06095c607f188d5b1480e8702fdf6911436847625871d36cb4b658. 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/MYUM72400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a56c4e14b1f7afa45766dc520bb44e24948ceadfd81ce35973e321d390f04c. 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/MYEM18500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a56c4e14b1f7afa45766dc520bb44e24948ceadfd81ce35973e321d390f04c. 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/MYEM18500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a56c4e14b1f7afa45766dc520bb44e24948ceadfd81ce35973e321d390f04c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MYEM18500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a56c4e14b1f7afa45766dc520bb44e24948ceadfd81ce35973e321d390f04c. 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/MYEM18500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a56c4e14b1f7afa45766dc520bb44e24948ceadfd81ce35973e321d390f04c. 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/MYEM18500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a56c4e14b1f7afa45766dc520bb44e24948ceadfd81ce35973e321d390f04c. 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/MYEM18500023.