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 0x9004a39f8d52e227fcab6761bb257472d4051ca784990c681eeb43984edb289f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e918b7e7-6886-41bd-953c-c8265cf1a446.json and https://artists.proofprofile.net/proofs/artist/e918b7e7-6886-41bd-953c-c8265cf1a446.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 0xba8bf12494e3f1782b47744c08448d7e7cbcdcdd18be292ce7460559eb45a5c3. 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/NOFFM2225010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9797e1d55513151db437978c1ee073df0b1e9095dd71d711f7f5241fd196845f. 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/NOFFM2225020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403a6e3148c767528eba478b4329c47b7ee48b50fde33acd78f8c8d732e4bc3e. 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/NOFFM2172010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa961e3a46df33ab533e8edd7467684f098ef988244d38770ecd230028476aeb7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOFFM2225040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af816a724a8aa86209fcbbcf13299a3e8b824211e6844fa75dbcc86fa7f72ce. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOFFM2225050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc732189fbb3980145620347a5ac893fe4bab14626619a2d471b44711ea6c9c. 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/NOFFM2225070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9416a1ac03230f54d4d257fedae1ea88dbf97610041a85e958fc32cdc124cca3. 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/NOFFM1536010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f72646a81f7a5572201c0f4341f9bdcb623dd3f0a33d44ec48c4a596a4f750d. 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/NOFFM1536020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f97463d759708746d03421473f01d019d0d914e3fd678d030d86dc6152b5b61. 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/NOFFM1536050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84079c4ec967d23480bed0ab4e6a74db15811797e1a9b808762c85cb3b061c59. 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/NOCNY1201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6de45924051735b719c95ccfc7cb55de1c75d44e83b075a3d20ac0fd3ac081f. 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/NOCNY1201050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3771254cc0ff555cc01fde249ea56d17aac930217c1e2bf29b7eb162caa58f36. 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/NOCNY1201060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2470b7260e847daf9500f9d5e7ab648aad90f44a102c964dbac62f10a0919ea4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:25:53Z), 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/NOCNY1201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305960389827796d5d62df4740b15626cb3ce3a960530fd166dba81751bff298. 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/NOCNY1201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71df7c06885c42116a6fb73c71d2c2db581646da4f0e8f8018cc758014533e06. 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/NOFFM2464010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb947211e2bbde1b0688625cb137474e2394d036c8560cb38fad06e19f740d076. 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/NOFFM2014010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403a6e3148c767528eba478b4329c47b7ee48b50fde33acd78f8c8d732e4bc3e. 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/NOFFM2172010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b7cec9b9a6232984a75d62c8f599787ace3338ddd76b27b6ea1421c3929a4. 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/NOFFM1536071.