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 0xa2ad9b33c8020210583132600af28a0cef590a47adc6742b33e5f87249626d76. 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/e60a1a7e-0f44-4452-b67c-f510e30f8e1c.json and https://artists.proofprofile.net/proofs/artist/e60a1a7e-0f44-4452-b67c-f510e30f8e1c.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 0x3e1763becf651314d8c19d7438439c91477f86214f129b0dc1bec735d6981c52. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/TCACH1567118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed098ea5e3fd3cbd2cd8211b59f15b5fd0cb13de3f61c8c17f7a9e665d44c61. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:42:13Z), 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/TCACH1567126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7588faf40abbde5d9b845a51609eb5b1c6a6b642a3e9a50efad416d9998b3f9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAN111800256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ab79f62e6d375a18b2e25a500f9b8523cd7239626d53bb85e0090c93896d3c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CAN111800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679adecbdb1992c2a22433db1df3fe6d8de266a45f1f5bcb8b971f44ab7011a1. 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/QZGLM2265398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e7256b85a53e7e91acfbab25ee5083fb75612e9646d5f8537fe136b0562dd9. 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/QZW9K2203162.
Time and Time Again (Sullivan's Crossing Theme Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0c787c50be88f84850e3224a9b1e051c47d65b9d64d745aee5c58f6b5e5b10. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZW9L2370019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed4848f43cf71f73e6c625c0c5956defbbb5951acde10d8cac9a20a0e658f75. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM24S2403395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e7f5cb95d27fb103688ff89f1f30a893ff044d102c65ce89787e5f82df1523. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:38:14Z), 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/QM24S2404258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8705d2cc9aea9a53227ce6751086389ec61a3b4623e7dc75dbdde69291512b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM24S2405971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8705d2cc9aea9a53227ce6751086389ec61a3b4623e7dc75dbdde69291512b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2405971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6d2232e5acf9925213a098b406051fe97cd19c7cc2ca5380f282e84c5a5b8e. 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/CAN112000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d805b3c99c713d3733a3daf8f1ff1ca07fe4b186bca32a6cc8dbfecf730b3b. 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/QZNJV2561153.