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 0xc8d4cae5798af9f2a69a931ac4bbb4460fa52ac4ffa6cf13632209a26a36bfe6. 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/1abb57b8-0170-4544-8049-4bca2ae42eac.json and https://artists.proofprofile.net/proofs/artist/1abb57b8-0170-4544-8049-4bca2ae42eac.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 0xa7f448044f12ab4d086885cd99f4a26dbd0b2baa375e177900ee2efd39de6e03. 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/TCACU1635285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc77de4d96614d51f644788ce5a25caa15d995b7ec3fa4b580a22ca6496e3a8. 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/TCACU1635299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e75c045b461a686ef77a1c71c4dde827e9e28926219324a100eb4bd7473033. 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/TCACU1635300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e75c045b461a686ef77a1c71c4dde827e9e28926219324a100eb4bd7473033. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCACU1635300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7ff69aca36fe7d6f484f4e343015cfab020d7c6418c06e783a01028cd1b5d9. 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/TCACU1635303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992f773bf9b29f9cf736cf34009c22057626cd5d0b4a20f9278cf62746825855. 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/TCACU1635304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992f773bf9b29f9cf736cf34009c22057626cd5d0b4a20f9278cf62746825855. 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/TCACU1635304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb412ce503f703c46045f0b09aaddff616d0c53ea86da849abf4deba841a72336. 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/TCACU1635308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb412ce503f703c46045f0b09aaddff616d0c53ea86da849abf4deba841a72336. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCACU1635308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ff6471cdfe832a5779612d44518299c5b654f70a622ec0ff42c8f8f05a5196. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/TCACU1635310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94fce916e8e58d35dc8d531f812118a477d049a996439ab9261538dde59ef6e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCACU1635311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db30dab2908ca5f358e9fd1e53fcedda613bab0959dda3816ce5f26f586be69. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USWFE1890526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db30dab2908ca5f358e9fd1e53fcedda613bab0959dda3816ce5f26f586be69. 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/USWFE1890526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69aef69ceb5604edf06d6f8bf0630e80abc21de07f5d1763f568097bd3ccfc4b. 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/TCABS1490081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5db0a9efbbf7a23b4681ae12b4b7048a3b7f542ff6bb59324fd26861211b09. 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/TCABS1490046.