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 0x442c171e39543a7a3e2ece901a8a69c69ee29c14cfe9e1495bc688e3a2369aeb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b33d443b-0b3c-4598-9f32-b335d2b71fff.json and https://artists.proofprofile.net/proofs/artist/b33d443b-0b3c-4598-9f32-b335d2b71fff.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 0x623a50ecfa8197a73637f63adc64016c7f4d04be9f6b97fe55e301137b9254c7. 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/QMDA62445768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d37e68c110becbad86d2817ccbbdac3722010e06357755474c8c4d95e1d203. 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/QM6N22497321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3e87fae752747b081915c32665cb1d5f37c518b74366be668710f74af11d39. 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/QM6N22497030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dd34f681e63b1fba485ed1087e37e155d7085c7f0e55a39331b59718b231bd. 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/QM6N22414615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa618b8f88ac45dc9307e162176a99a87112418eed97f1f0c54d199c9afbd36ee. 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/QM6MZ2405251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb66f44ed2dcc604b70c3e100b52ed22c481fe1c7ae857a7d921fb7a69765e2b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TW2430227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9911b59952673811ed5ea951b37ac2e2624a27d1d625d57367638c885af1cb. 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/QMFMG2348751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58d619f73f37ef870e56c05cb13bf6441efacecda944658a8be5509918b6c85. 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/SE6XX2312115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230dedfa55bed84aee46d7b56675136e853f4a95fa3fb0a3fa87e2a3a1f76c5c. 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/QMFME2378975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81d3d5980f14c88e940d0e4ad7128e55a8a44236f5ded560baa4f18807cfabc. 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/QMBZ92357903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8966b4988287e6b94fa37d89884cbf5089a1324cdda1026701a3942f6f84b2. 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/QM6N22344527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf797bd13cb80848e71d3460573e19c015bf5d5d3123648fb69b8bce0263aedb2. 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/QM4TX2306019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde47636edb3934ecec6fd7dbac42a96795e50b46444638d98e9548a7e320c4f0. 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/QM4TX2306025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444f4bcb474ab3df7fc7b88f817651ed921d8f131be273498a1c3673ad2f372e. 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/QZHN32097038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283b6afc82e45f7eed794304800369ff45b489e7bbc28f47c66940fbfb9e73e6. 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/QZHN32074608.