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 0x47d9ea528fdd7a1aa53871949598d08ba43d15b51594ee9759b5dbb9f34fbf54. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28d45459-5334-4596-bfa0-a50e17222ca2.json and https://artists.proofprofile.net/proofs/artist/28d45459-5334-4596-bfa0-a50e17222ca2.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 0x7ebf617bcecd6f7fdca9ab19a458fe07bd5889510a37f1a357d2d36a07928ca7. 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/NLL151602548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70f17c53420d76fe007f9969c24487699b2f8d3b7795f9eada896a3dea12025. 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/NLL151602550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4684286f31aa32139a3ed4e18dd9a558775a8a01a1cfc7bec734195692a40015. 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/NLL151602554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09cc2dbb321b86db91a35c0017e081b7dac36a4fe1de56d10a648f79d74eeea. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLL151602556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c0657388907d299ac0be9bc3102d0df4a648433fd3f6ace95c7d6a00bf827e. 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/NLL151602558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e161cafcf07b1f077fc3a21b8fcae62a4824358ee43ff58ae62dca44c852d1f. 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/NLL151602559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498ef22ac5ebade7f9e7225cc06315cf381e07e398b81987ff3e288f7e62da90. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLL151602549.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f4e32b90ef73de157ce61f6a0b7e1b7b2b913c17fab753d9cd2a617dbd98fe. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLL151602551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c6a0c723bd7cb5ee559d1c6ee2ac8edf3fbb9125685d8ffbacfab93da46643. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLL151602552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd041cc8a81221ee223db82fa1423116db1047fc5ca8df4d8cbb1bdd611fd7ca5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLL151602553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614c54dc972dec9a330c313e4e4331ca800d057ba25860012f4593dff1ef7ff9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLL151602555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a7411516105669e43f2d45d0ca090c63bf3176a711b39fd19bfdc6cb025f57. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/NLL151602557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04140832f6a2519ce6a8f1cf3460264c9f8637cc851c2437fab9e0b3c781e574. 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/NLL151301763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32dfd1e4f78f80b05703719a5dc284cf0ed87cb06fe6d5cff32edfec6511df0. 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/NLL151301764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a5596c8b7191134e48d533d31c4aea98d5554ebc50f46b39d0d2b28a517671. 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/NLL151301765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd92bb6442fa303af456be48c57abae1cea146cb7897ab1401428b5368bf950. 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/NLL151301766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ebbe063020f448ec80ea48c5a178807641290c890bfb4a8ae931f00a145924. 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/NLL151301770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaaf6871fd345739cfc96f2a950fb81ff7b0ade2085426a2f4208c4321a81be. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NLL151301767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccf5fdf626eb5fe82fa1349efdbe30c2df40953bf276aab473c2745134cd13c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLL151301768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527b3fc7e2a8e03149aae99d7e2f010c2087de861fcdb375a07be0f19fd1ae82. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLL151301769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c644faf5de066cffff477d6d4eadeb8e028f3ad5b87f508e393e520568a0ac. 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/NLL151402128.