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 0x377419c49ea40e7ecbb95183e8008ec52048f03a6e99f9427ba33a2d5c1e09ce. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0acdea06-0174-4462-89ae-bc71e8148087.json and https://artists.proofprofile.net/proofs/artist/0acdea06-0174-4462-89ae-bc71e8148087.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 0x49ef5219b296181636631cc63a820c71b04f9de897f88b068cded9bae83b54c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPVI01704140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578b83b99efb1b72e2eb02f5ddfbe7a8e97a8a925273c7578ce03fa0b4563a05. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPVI01704150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c82d61c279e1f09aa8c0fac8b155e1adb5ef2277ae933fea3ce0aeb3b02e5d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPVI01704160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd84adf53a116aad62322696c9e902e594a773287e25f944af605369f95ae454. 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/JPVI01704170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579bcab38d567a7094f8115ac1c68c7cd9f0bbeb8e4f5e684f7a4d3df3488a8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPVI01704180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c3e0d29b39aad7223fdf5d7d692e8777caed823ee69377bb642ec3927a4e34. 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/JPVI01532780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c5ba59dfa16abdb8ad6273401463c99b38c04f2a05ec94b5e4daafbe40bbb9. 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/JPVI01704190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422dc404733c022be853b3b631cdf69cc504a872f7ec87564c68ffef0e1d5225. 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/JPVI01607800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4bccb7148c667a145085e2b101a7f0e8cb2965bb14b52fde34852f2221c892. 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/JPVI01441790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee1f6c1ac328833fe3d0de3da578896e7fa4c742d1a8b7d7ea896bac696bf45. 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/JPVI01633720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc924cd3fd98e832bdad02b45291c893359e63a4025c5ebacfbd9893aef21bc. 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/JPVI01704200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65e7da8d1947a2a7b9ac068a77e71b5053a23c0f50139f36885c3c7241d82c4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPVI01849820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ad25df6e98aa54fd31f746ece8ab09a65d6d3a2434b9f394f7c459b94e3d8b. 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/JPVI01849830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd31ea40ef5a7915c11700927f730b3523d04a20d589b8b78d3b37e9146f706. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPVI01849840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608f486d737f50ad8532ff83bd8759ccbc53619319959bfa2e776bd081d773ed. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPVI01762920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc44343bdec86affb1b34dedebed876b3f80c088b75c16a2b81af072538601d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPVI01770300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee1f6c1ac328833fe3d0de3da578896e7fa4c742d1a8b7d7ea896bac696bf45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPVI01633720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7cf436f93c8d6b1d2ecf64cc0325f9413d38f2b7cdf5fe07da3947f913b7bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPVI01633730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422dc404733c022be853b3b631cdf69cc504a872f7ec87564c68ffef0e1d5225. 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/JPVI01607800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaac9a09084537ec6ba79518a74dcfb7af8e851b83df114bdedbea5110e6445. 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/JPVI01607810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c3e0d29b39aad7223fdf5d7d692e8777caed823ee69377bb642ec3927a4e34. 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/JPVI01532780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cc665583964fb560f6ee1af6cdf9489582d3fe06c0d1ba4103998e49559dea. 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/JPVI01532800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64fa6041167f981f4752877d02c3c4b5ca36794872f891e07e393abba749c1b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPVI01441800.