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 0x8154ba2d169b90b18e5cadef586a4945d73f1172deecf72f6bd549817d79bad7. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2ecb821-53f0-4d76-b971-eb1e1ac0bfbd.json and https://artists.proofprofile.net/proofs/artist/b2ecb821-53f0-4d76-b971-eb1e1ac0bfbd.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 0x3769bf8eb584f15c29f2623b816fe727b3bc43f6f836cedc237edad6b87184c8. 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/TCAGU2397765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab40e7271e5d04ce51b281a1fb296406f426e47626fd6b55818248c1c7542742. 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/TCAGU2397773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dd2eab4642e92044410d134689baba868e041d51f8052786c540435c0f1a00. 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/TCAGU2397756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf0b4c8b6c9dffb2b4eac2dd93bcaafa6982d9bc9c3829e3566a72731224816. 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/TCAGU2397762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8180d959d7ec74e34bfaca134ec0012e77ff7529de1706328e753b35c5bcb6c3. 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/TCAGU2397753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b11dff3d9b3c104580ae7a57e4af54d6973d313081cf8088444a40f88b5ec. 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/QZNWX2362192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f8ebfff2b7a5dd411e2e702a68202e3ff59224e63f5697fe4949e0ac43e9c4. 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/USWFE2491263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a870860c8d2256706bd856a52a6f97341f472d461d5ebf4a18b35bfd757796. 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/USWFE1990600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3769bf8eb584f15c29f2623b816fe727b3bc43f6f836cedc237edad6b87184c8. 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/TCAGU2397765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab40e7271e5d04ce51b281a1fb296406f426e47626fd6b55818248c1c7542742. 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/TCAGU2397773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dd2eab4642e92044410d134689baba868e041d51f8052786c540435c0f1a00. 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/TCAGU2397756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf0b4c8b6c9dffb2b4eac2dd93bcaafa6982d9bc9c3829e3566a72731224816. 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/TCAGU2397762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8180d959d7ec74e34bfaca134ec0012e77ff7529de1706328e753b35c5bcb6c3. 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/TCAGU2397753.