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 0xa0b6ffa2a8b5b16731d2eaee46a53b6b23a72bd911c1be4f62ea02eb7d8c0beb. 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/2d8b3cca-272a-4dec-9e26-8ceaddf948fe.json and https://artists.proofprofile.net/proofs/artist/2d8b3cca-272a-4dec-9e26-8ceaddf948fe.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 0x6f1cf9063104a27588e35c323fbe564b8a195ad254e1a7cd660f232216b35e76. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:53:30Z), 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/QZES92392558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad18f82a3a0c0ff6eaf2c0a8e79a1d4d1f4a57f5b0b710f742329d0b776a80e7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES92392559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d963492de4931ad85895748cb70e3f418595ad43732a12197323bc8b11090. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES92392560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6323f200e6f473f0f7b80c2550c0587faf2d1715f5cc24f0cdc8f980ef6dca5e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZES92392561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9710335aad9ba6bd4bc7d747dbae927110c12be359897c6c437d452c85093d4. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZES92392562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecee532adb127e61b575ecf11ea94160e4c9494fd9b25cdb522c0ecb7148eecd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES92392542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbead3f58b2bdcd33d738169071760364761574a6d5953a44ba986650d3d831c8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES92392543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d92c2cd93ded364bea0b439354f66c0bbc0fb384324e22e5f573307d2dd126. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES92392544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53047f86a44b628bde62354b1e6864d0d74a42ec8e537cb3eb1a227f082e71b9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZES92392545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a616e950cc8861bc31dd2e3da24fe62716f443775f6886cc19e0b6abe53c6d6. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES92392546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f583a77ba2a09269f34f8504ffe402a4079bcfc0c629dd1d16c027022b76990. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES92392547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbedbd055e8ff4b450201019c5279481103419192edc9015abf9683147fcd6e3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZES92392548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f56e4f57eae1214ba22d0acf5812157117480cc8c132325bb69c8425fee8d74. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES92392549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1163dad73a05bcd013b76a3e81307bf5f57f5a0ad237df46e59bc295e8bb5355. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES92392550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a2d97cb25fe8dc08ac5b9d9df2397b7b8c9d1a32b241084acbc9b24ac579c8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN92380045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa431b168990feaea5bc2f8b9d19cadde6df1e419b05bb2cf3baddbc87615bb50. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAU2396021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259dae690b242a3da34d7180198abcf8b134e7d30ff2829535edf9e18217183e. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWDD2434633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d8a40bf2b70f4e4f8c8c09d9788d67e25e80d1c0eb54201d8ac7cbbe6ad45e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWDD2434634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a661000d50e1b57641c35adaa64d4d5e0269b53f4291307d0ee054259aca72. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZAKB2521585.