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 0xf4ea47696c4cdf0b56aaf9049bc6d68e0e1ce508e6a5c8bf325a30fbb019a162. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/BKTC52400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edd654827ac8c5f2ddbe87635f9caa1ba704b2468c3519dd98ce336b5683c4d. 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/BKTC52400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b19809a10f0c49e52542c5b5b8372831de3f9616e7f2d29e1073a029db7b9e. 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/BKTC52400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f8113cd26057ebcbbb9e61e796ba5d4e8e0778bc1e1cb54fdc91dc08852e14. 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/BKTC52400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd95d42d4dcc49349cd9c81ecf320c81f16aa96c2f50ed75567212686045787e. 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/BKTC52400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb245a770311dda88d5e05f82bb533b5734e1a0347be7cfba785d7295ece0d65. 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/BKTC52400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef07081c379147e90fceb955ad793ee700ead38c4dfdd2f83130a9ec2fe751. 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/BKTC52400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6a1c2933fbc71be86167e1eaac1c6d5cf51d1a89b1f225e552b4427264494f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BKTC52500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f714ae82c76e4d10c0175422bf456243ac31898c08d69cd3c0fd37b9850ebe. 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/BKTC52400010.