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 0x7ea113a5eb9abff96fe8d007124c4585a9cc769238cb40f3d380341cc3857400. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4129c73-151b-4ded-81f7-19bce562df65.json and https://artists.proofprofile.net/proofs/artist/e4129c73-151b-4ded-81f7-19bce562df65.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 0x6d5c881652bdd5aab7509d72c728c92164f5b7cc811660f2b5d83e28f787232c. 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/BXKG22400829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99b26637ac5c317d968c50c5f6f520f0d2248d3d0a70f290d0c2765434289f8. 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/BXP0K2300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e55abd2476d724c95b72b4ee7091138de5bf7721c27ea9a088ff2a421e16133. 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/BC3PG2331430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ea79e09b20e6fbac63c13d9352862b6285d1ba3f7a31e1c3df665100800369. 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/BC3PG2300648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa73d0f7e744007ec334436434a0b8e6e86320e51c0bc4706122fc39be21165d. 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/BK2242401572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ce42e6c3fca80c82b6d10888fe9bfad91f9da29af8b050ba7784a789d86c1c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BK2242400929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3674556fff9b059ce8a1e21f8195e02013b04aa54c3879fb17c3463605d563cf. 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/BC3PG2401840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0054606d9709294f4e5ce7b174327683e1d1206ed5ea6a854d6690b518a308d5. 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/BC3PG2400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666fae2e7ccdab26cb2740592b0240123bb7557cf809e862922804b91eeeab49. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BC3PG2307003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ff1c27dd51cff192dd5d451438fe73027b7ffce5f5a2f4aca5d3977b7d0156. 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/BC3PG2306870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0ad86fe3dda85a4f755015fb6cffb869c456e0314284a98c9b0c87362efa67. 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/BC3PG2305550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5a831a49c8201e5e03408e0392c0abaee2663437813c7657fe25f0807c4cd3. 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/QZNJW2362232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac46a47a8107432c14a5919fc495046cf5a2ff4b38c5524563ead2c33722bd6e. 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/BC3PG2300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a9fa57e7e740fb79c56e5e0d3b6f7d0a2468a8f093d5571bfd81f518541861. 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/BC3PG2300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e9540f33cb68b6d40f86b46e16b8edd564ee843de7b6eadc810e89e554af0a. 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/BC3PG2331043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a490c11da919a89604907c95c4ef419d986911a02c97a0fc57476febc60cd4. 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/BC3PG2401070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea47e9317304b7fee56990accae7ffd0e1c1566d646b746692637f82e48f6c7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXG6R2300452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671940ce32c878c712917c66bf0d3aa6a9ba792be5c31c4da3d54a8090550a8b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BXG6R2300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ffef967647d87ea8d59689a55507c09415fcbbcbb786f05fbc5b1769d21cb0. 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/BXG6R2300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732285d4e5ac59e59f0eb8ad8776c2b4d139a7c7aa6953997cac7cfa823e2d89. 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/BXG6R2300459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb8c85cada1eee15769d574bc518e994879ca0c83b1079b41a2ffc14b996582. 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/BXG6R2300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4746f9760faa8c261570ae668c902996f44d8b8a8dee189a37b2266bc131a16. 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/BXG6R2300461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df6fa0f213293e355fda4c4643c2ffd5d6f10498569c1a22752ada921c3f67. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BXG6R2300454.
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 0x7908c2683cd767799e635915cf93f3fa2b7107351237ec45178d38250ab0a8fb. 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/BC3PG2300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64b156e71c8e9c433a3af927231914d9a3752fe85966d1dd663de042ddd820e. 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/BC3PG2200548.