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 0x8e4268095bcea1946ec1a1aa7a606a081e807c98c76349aeb0be49747f9dd7a9. 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/fcb0359b-ee5e-4a21-9610-0e795c71b1a3.json and https://artists.proofprofile.net/proofs/artist/fcb0359b-ee5e-4a21-9610-0e795c71b1a3.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 0x42e6929ecb33d860152459418c098fde57830dd16632a223c927e7e1190368f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLRD52253237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9f8e8de199f8eab9cdd40573c4bc54785109a3b23b742b67b217b93df845c4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXG6R2301087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e4d6db2a752fbdd2e1309294a47439191442b7cd974da9ee7ba2133a226361. 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/BXG6R2301088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d89b63775a0659b8c6ae163a0a90321f03c4397232df3028ca304c33b3eb3c2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BKBSS2300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda9500b144779874d39aaac43ae839e0cf4e8ba2b66576f7d491fc62d7dafcb. 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/BXG6R2200593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e273d539be8c05fc3b12ceb5eb516149896506794a433ea97ac3cbb9e9e76b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXG6R2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfd97bb93cb74b010435fa0363a46a69385afb3cb672c04db174c265e61583a. 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/BKP9L2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df2964893e54a090f36c30a6c93d245531c0e7838764722360c1ea557a944c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCE7P2402941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfd97bb93cb74b010435fa0363a46a69385afb3cb672c04db174c265e61583a. 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/BKP9L2400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afe819985ec861ebb75609cc13be4b4ab4e620bc706ac58966f4832e9c9030b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BC3PG2500558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762cc4ad4c364dedc65f2470002fd88e0c76bcac7bd4546fa600db725c3a326c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRWMB2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ba96501f7829b3276635c8882b0244b42369919fc766fcc0ae827b19727b0b. 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/QZNJZ2395822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d315c9cf88995a4dcfde95c102b94bafbbc7c6a6fc0be52b01d14a8c7f13ca. 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/BRWMB2300899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7806df52a8a8758a4dbda339fce2eba0fc983a22616e30d072feaef99bee3d5. 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/BRWMB2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7806df52a8a8758a4dbda339fce2eba0fc983a22616e30d072feaef99bee3d5. 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/BRWMB2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea676b8318130e03e817ffd35f80ac4ade7001bd68aff5a9c9eade16f2630e41. 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/BXG6R2401228.