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 0x6b24661c4679527e54f865e9437697fca30434be3ca82e78b1d1fd1253c0f36b. 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/f467ce31-e98b-4ffa-be7f-530fe45239ba.json and https://artists.proofprofile.net/proofs/artist/f467ce31-e98b-4ffa-be7f-530fe45239ba.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 0x124c159d0a2dfda12a3b1c917eaca29d67e73610fe8ec432fc6dc572c7f4cb7b. 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/BREHV1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa617c8ed8cb8d252ff68b15e750807118e509062c750b98c2a02fc596c35d199. 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/BREHV1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8552b8128f5c7f5576f0ba83cd08289f5c63a2e8f1731432010023ec6e5a4a9d. 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/BREHV1400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3802491c3ec05f38f25c0253b6f825d9edeb1b8544f0194ba2d344a8e281e07. 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/BREHV1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3418673effa4b71a143a565c2465e45b98ebfb6b6d8cd6b502f77286c4a708. 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/BREHV1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e31f3d80cf19d06cc84dd574b1ebc2ff120074ebe7ebfb965d54f41a53841d1. 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/BREHV1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0e8d1b3c641d2bba5b0e203e0105c36e790434140e6263814d113a6b58e9f6. 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/BREHV1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a15663c4ae549f8edd3373a1af276c2f296a3b8993e8170e7d052c4ae3d83f0. 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/BREHV1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212fd4398ef9fa0cee3a177f64962f2a1550b44e6586e7d24643dc124aec6093. 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/BREHV1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0279ed2bafbe60a79912b4853e555df59ba9f4040c65e05ea3598d392b75d20. 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/BREHV1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a5dcaa827b2ef4d382c1ef444b14a2a5c78585824547b6396c1a78621748d6. 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/BREHV1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a98555bc18b75bffe5d0d2b16d77a96ba02a86c7293b01762770d647a8ee8a. 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/BREHV1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c471c12ce436f7659f99e6c1ecd14f3eafea507017f496c276eca1d9f7da887. 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/BREHV1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5df56a1076144bf2dcc85425b678c13b5abd45f7f13168b00f35e3cd3cea5b. 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/BREHV1800001.