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 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 0x6b384748e9d6d41c497ffa30c9219d062a15f968416a01c4ae3f5670dcd27b41. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48a3cc91-bf39-4cad-a501-261f8cd4c996.json and https://artists.proofprofile.net/proofs/artist/48a3cc91-bf39-4cad-a501-261f8cd4c996.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 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 0x93e5c027cd1512266b4df51ec6a500f33a2ac942bba8e3d115671291ee3e13e7. 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/ARC081800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34da4b663f3bc7c123bc84ae21f64e93727ae6ab9e3048c78283cd59fd610b3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ARC081800138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72383c87d543f971a98c95762631382126db672d2c71a25bdccd9f357c909e8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ARC081800139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0aba2c90849b832053265c64ee435f7527e257edda655c05f369be72f51f68. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ARC081800140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123ea4912fc363d51de6d5ed7d762f6a9682751a99564976fce208c76fba7543. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ARC081800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24530661e7bac31af0f4d0d86b8869226267283832a3069512c49d6769a35ba6. 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/ARC081800142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ff9b66115d9e390d688b311bd0c48690cc3fec06732ae0a3293cd7828a360d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/UYB282006017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88db8d985f473e996f607ab5daed5dee7e75be3debeeaabf8ce7a0c09535cdcf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARHXW2300469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ee134631d6300b4e014acdc4288654d401a4c1160fb99aeed97085b88a5ba4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ARHXW2302423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ef67e4a62f61c3be4409293a74844aa673a3c6abd348162d53023916160408. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARHXW2302426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54e6c7591a4457ed19765de83b0c7b44f057990059fd7e6e01d7001d15a7df. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARHXW2301515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce1fe086cac3bcb291ff3b50adaf9a091e84050c8f16ea00a61b706ad161c7d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARHXW2401206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923ae313a0affe1abc19b3113ed3908ed88929e664478145223cc1b91ee253ef. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ARHXW2402139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923ae313a0affe1abc19b3113ed3908ed88929e664478145223cc1b91ee253ef. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ARHXW2402139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e11042df08cbe3a2a1b7f2ed1e0523cd7e0200e9fbe23640ce85cca7d22c323. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARHXW2500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4d8154ada425a6173cee955c371cf626fc9956f191a5b9319597a61e9c66fe. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ARHXW2500125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54e6c7591a4457ed19765de83b0c7b44f057990059fd7e6e01d7001d15a7df. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARHXW2301515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923ae313a0affe1abc19b3113ed3908ed88929e664478145223cc1b91ee253ef. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ARHXW2402139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927e5786a1523fa54275437868f78a3a96bfc8192355ce664c01c2907b31510f. 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/CA5KR2386869.