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 0x2833df004cc16c6cbc55a36e7dc952388b9e7ab17a891a639b2e533a12a04cbd. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7933d2ed-eafb-4cdd-8ef5-14470bb655c9.json and https://artists.proofprofile.net/proofs/artist/7933d2ed-eafb-4cdd-8ef5-14470bb655c9.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 0x5015f0cfe4996b0a8f418b01d11cef6b1e3d07b6a4cf4795540f4e77f278068e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/JPB822200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed4d1fdf6c939bdaf03cd4defc8610aa77ad9b502607a921a93896c699c8c04. 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/JPB822200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e6cd4a0b6d2d29614fbea2246f68ef5d2bfe1a3cb9b2ee642a0779f847bffb. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPB822200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95e3a2d4f2e48da4138af1da51d64411d4888d197c0b91fdbda9eaa0e8ca563. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPB822200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa2d86505b57972c79f729f4088c38dbddf24d4ab7536146d5eecd514bb041c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/JPB822203910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68ea2c0a7eebd5d356c372d457c994a4dd8d0fc3c04735a6bd28a06d30f282. 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/JPB822300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c34b76537d5ae0b817a4a67699872a5567d34e6c8656f2a04c1daed0418c20c. 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/JPB822303100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c34b76537d5ae0b817a4a67699872a5567d34e6c8656f2a04c1daed0418c20c. 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/JPB822303100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76f956aef8096d276a03d1b89139508b436b62567ec62f934ed2aaedf36c85b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JPB822300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a548c9027226a8270e8a524e174e59f2171a7e7136ce88836ac430865bf7d4. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPB822301850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef213d96032dec4ac72d7f518eea4aa8984c6faeb7c4e78237ce6b8106e53790. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/JPB822303110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bb7b0f801a266b417dc9473f693290a875d4b8b6299b5d035d54a417c35116. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPB822301860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb1ee879f6058ef3b8d72992fbad3c038e45cd38f7fd53c0bfbda36759cfc63. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/JPB822303120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa2d86505b57972c79f729f4088c38dbddf24d4ab7536146d5eecd514bb041c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPB822203910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6018a89b7c57c88ea65532241bf9af76f51f341c58dda401b9d7a8590ff3f7. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/JPB822303130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68ea2c0a7eebd5d356c372d457c994a4dd8d0fc3c04735a6bd28a06d30f282. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPB822300180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7693dd4e31baa5c5bec48a688c19910a675a097a36ad2f3da830092b405d80. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/JPB822303140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e13cd004621faad1f5b231176a2de5bda46151f6452a31d13c6ee8e290ffa1. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/JPB822303150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f35b9c1f1934313800f6fce95b11613789990e031770aeab3915ef5a02b0be. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPB822202630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b08c8d551dd6eb06f914871101b4c8880adbed3ac7ff881aa6149911cf76f56. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPB822304870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548cde4ab4a9674ac0c893fd644164fd36f6b09ee0a335e895b420b7afffefd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPB822400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73409c6b7cc88302fa48fce115c47401d7c1c599f685ce92743f2d30f4697bf0. 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/JPB822400820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd5fe321454b75f20dbbacd1246c801ba9bf9508e089189399147c0b0ebe91b. 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/JPB822400810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0ed94a682b19607fcef97504b041adf36d7c15b4d9970b96b70930254d2ccc. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPB822501590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8183960c7704b11c42c26a8a6c764d624245540bb0bca1b15f8a664a1b05d33f. 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/JPB822502390.