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 0x2aaedda2d7ae8664b93aa1c0c62c066469928ba376171b68a55bc9b42acf1b65. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cdba8d23-86e1-425f-a2cb-e48b282023a0.json and https://artists.proofprofile.net/proofs/artist/cdba8d23-86e1-425f-a2cb-e48b282023a0.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 0xfb9f7970e5fe526cba1456ff85666bd4109b144684a62f502febfbd79aa7634e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:28Z), 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/TCAJL2543895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a02586148cdb7f6fa397d7f3d12e1d1a5d748d9501b0093036ea99661a7e387. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJL2543432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466355b489134a38433d737820f7b91780fc7594fc9b2ee36ca554c2221c3721. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJL2543905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a7890663280f38c447384ab70f18d2c3ec92cc5a73595492253102d43ea69e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJL2543917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f31951838743e80bfc74fac4e2bef0b1e90b953a5491b1a471a1468e864166. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAJL2543942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7881fd444f4fc8ffc48826905cee763b4b46739b011c2b147ddc59bf622210b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJL2543967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8960ed71a23f75f7412fb2eff74d77c6752867cb79c3a2fb28b0ad849afcb503. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJL2543989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d02fc7306656489949a8334c801dca746743c2e9128829935d612e6ee744a0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:54:14Z), 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/TCAJL2544000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6adaa74cad6f839b26160fd2f77eb6a380cb414ea92fffc795ca41c70699235. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAJL2585172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d721cfc099239b5bd800253f4ac05b7e83e2303d82cceeabcd5cea27d03d898. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAJL2585024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4dfa4eebb57486e6b690c0eb209b6f338195a057b7c16773bae66099962a43. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TCAJL2585089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a93b06b6fd4174aaa53be6bee92d3fead3ecdefbca03daee44bdbd62515fa8d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:16Z), 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/TCAJM2584632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4a43bfb6f0f675654ed2315513d8fe3d98c57f82ae2378f5cca7323952b7b0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TCAJL2585056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cf09c317a59d0a8f9d068100c67ca2cdd7fbd1f7be99ef6da5de0db27ca303. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJO2523764.