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 0x2a9f1b908094c16b0542523f9e91acbbb2bb55b3885bee638aa885bcec4a1e3e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87476806-02c0-4fcc-9a51-c8e6582723d4.json and https://artists.proofprofile.net/proofs/artist/87476806-02c0-4fcc-9a51-c8e6582723d4.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 0x8ae31f9d7d660b0d09b90b3888c4050d55a075539bedbb35483de63cfb1a1a5c. 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/SE62M2175362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c30345b64f06cb49ef72fe813e9484b7e6b7f09c6f4fd5cb52a3d06daeb6b6a. 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/SE5752261849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13182532736b452f0a2ed3df224e236afe159d5eb7a52ab1c486001fac6eee0b. 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/SE6XX2267685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c7c671b20a7a2cebb2515840a510c91ec018050cec12d4271d8cde2949a700. 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/SE6HN2279962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bed936d23c0355cdab0246cefe520c07f0aa7c2d7c56b1da2dbab1a9b4a5ccc. 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/QZHNB2039369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a88a04c7b842e29b85b49c9adcd223f7a8617f8c9c316c40530da65c0d7dadc. 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/QZES92021295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018bfd452a037bf8cc79502c2703dde716ef54a0c10cc2e67027e259a218facd. 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/QZES72096101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0ff4d4f3400b83dd6cacf510135eb0866b31c1d2b1c995526d64865f4660a0. 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/QZHNB2039370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b653d12faa25be6f1376798ce039be327779c608ee941b603fb369911a7e1. 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/QZHNB2039371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d9498ae23239c13205c0bb7a6c6cdac9fef91a77f0362263dd689ed3183892. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZHN82013810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd73de6b71b0c1edb12f5b522c251843fcc70422dd6ffb1bec4a5beecc674d7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHNA2059310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80b46db7392af50f1d883acf71037d105485bdc4aad397948a10fdc612d5d3. 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/SE6XW2279566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c7c671b20a7a2cebb2515840a510c91ec018050cec12d4271d8cde2949a700. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6HN2279962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c30345b64f06cb49ef72fe813e9484b7e6b7f09c6f4fd5cb52a3d06daeb6b6a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE5752261849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b0f570b641230a6622a5c915924715fd1d83f050f2b5cc1f8754f2566d60c8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWU2081321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f66857d1e19ec27abf52c38276c5dc0a4007de019645180035b57ce33b7b50. 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/QZES61979071.