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 0xfaeefda9978c2ecff6927e67d1f7ee7cd00abd9b9b44ba486deb56911fdd774a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43d94040-81df-4f97-9835-66a4e7ef77dc.json and https://artists.proofprofile.net/proofs/artist/43d94040-81df-4f97-9835-66a4e7ef77dc.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 0x785769325079f32616916b2500dce68269c3cade30548e2ddb6af3ce9f9e8855. 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/CNZ352100530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110d486c7feed3e01e296fb7d2227b8bc423544d21975f733945d4b82ea31b51. 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/FR59R2276776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e60ccf9c914969d0077dbf90c79754a03d9b643aece35cca0b174ea179a8980. 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/CNZ352100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ea6ed0bc0b3b4c3423bc8e377fc8f02f947a6457a5a752c77586a2074befc6. 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/CNZ352100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d313e569b78082c32537449bbd25ed26e1e92b1fc66776d88aa9bef96369f6. 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/CNZ352100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1956ba37cb061b73713b00929f1c84b390cca66cf08a47dbf75593069aa8664b. 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/CNZ352100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da4d0a9bc986288a74ad880071d67f6751e82577586bc5192d596e822e7a2a4. 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/CNZ352100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8b185b5e20d50c323de683b4e8f65252393ed1f70a971e617105b3e16b49d5. 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/CNZ352100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd57175cbf6d419e728e8c48ef5484d3d409211cacd58872532d98dd0aaaefe1. 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/CNZ352100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefda91ac48df6158e8012debbe76868a0fa5540a9b24f16d6ea5d42bda6eb7a9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:13:58Z), 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/CNZ352100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19cdc04e7e5be33c8cbb0ccea937bb01e1b766e3f9fe440891eb1efcd9a66bd. 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/CNZ352100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970404bf5044c49e8798ceb56c052a02fc42547d974e024e3a47651a54c86fad. 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/CNZ131500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689d1ac2c806247ccf0032945312ceeb577f6d78e4f60fe1f6a82eee983341e2. 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/CNZ131500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd92bafb828cd642addfa2335ebe08331ed66256b58c084cbec46a3e5bb2ba85. 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/CNZ131500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b9c0a2d9c0be16eb7ad1e734e7ce47f06115eed8eb680a45714479355f47cd. 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/CNZ131500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b30b86e1e76ef0104712aa9ca815f31c69f3c5ea6e842868269e7ebb55da88a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNZ131500091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83d2d7bffee1b2397b3915c158d274a8fc7e1ce8c7afc4264880b20f98e3253. 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/CNZ131500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afacb06a3de8408147bde1fa5a8823fadcdfad51d83313236c7e1895ff4407e. 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/CNZ131500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503e9fdc3658c1e7ca5cb22053b81de507b853a3c45b0a9ae2a56e63f2041e39. 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/CNZ131500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb941e74363fc837883f97a4458db29889c8d94ec7f763d0e1c2e05574ffe2b9e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CNZ131500087.
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 0xfaf21c4ac78068eae011e922ffa7809f52c2c6cd93ce1fa1be7493a618817173. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CNZ131500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89573a23cf93b6da252bb6819400a0dc55aea0603893aeb46ec83bfbb3476348. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CNZ131500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bba552e46db4c10b6f1bc7956f888a5f5ea4d23280b4c3793cf0c8f8899814. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/CNZ131500074.