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 0x0da7b6441fb702faa9702e0a21a8a71ac173bfbf3f0f345cfaeb82072e74e0a1. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a141a9e-67ec-4b72-97ae-309fe40279ad.json and https://artists.proofprofile.net/proofs/artist/8a141a9e-67ec-4b72-97ae-309fe40279ad.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 0xab48702628e754dbf536e48d221ee8d3f2548a5acff9438a134107481f50714b. 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/QM4TX1806968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d78befd902067d4807b97ad66c13730f0068049de64fd0f35eec8f2b741bd3. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QM4TX1806971.
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 0x8db85ed1fc84521471bce10803805dddc2ab49904fe3a35e9b051680f2c8e4ef. 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/VNA2F2302097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d686a9218dced49dece4ebc6beddc0352842224fcb5ecce7ee8a73925cda83. 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/FR59R2261633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e16dafe83edb03da6e7fb3f045dc3a37f9529ae92fa01ef2e9d8d470d2d40aa. 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/VNA0M1804317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef20c260d267bfdc85c1b0e3f2f986a7ea745f7c67d6a178e9a88d6b8e99f8b. 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/VNA0M1804319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdee5298d8d61b845d7518c60671a9759072361a388bcf2e9640e38e39e27478. 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/VNA0M1804322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ac877331430773fadf0b8553f21f0cac67e967545d0e019f40d834b958fd1. 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/VNA0M1804327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6427587f0313e892f73c2a517f9e58ddb9b39e94f2f447d40b8ba4b498c5aba9. 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/VNA0M1842236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112061d9b8a2c9ccc6b05cb24052c1ccc8c106bbbc4a0fcbbd27e125c4c17b09. 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/VNA0M1842249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06889fee3c05abfe8461bad2092a479da4aea1f1eed228f91656c4924855b8af. 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/VNA0M1842251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f5e51673359b490d537605bbb9255c9f2f1fa2aec4d876014cc0a027717545. 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/VNA0M1903816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1495a0ef970a2107b7d3a07c5dcd1617d70aef0fe5a2c4c41ca8ef084d8b9483. 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/FR96X2266162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba93b2795c7cb1e4ff8e7e72c3aaeebd73fa9d08b4bb7eedfb1b7c0cd9cac2df. 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/FR96X2266175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acc6e75acfe82c14e61a07a7219891288a4de8f35cfc9d57de3e6bd3a40d999. 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/QMDA72193732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227e90dcd85029cb4640746bbcb0e005fd532c13d0e2cf25223729344ea44fd7. 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/QMDA72193730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1bca4e9420417e6e21c8d602a932a8ac9bf6cd278e3196e54b56977e83506c. 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/VNA0M1833099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcf612ebfcbd9ef216368353131d661f63590fb5c096838748371e74ef5361c. 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/VNA0M1833103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5def5b9f98b0ea319c5ac7cf9262f54c261a35dc50b5da6abced10d9c9b0c6. 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/VNA0M1833107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58cbec7b776cf9a3dff3b808f4643adbbfa07df9011b669b5e3f82e26291219. 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/VNA0M1802868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4127d1ac55af711495938564800ae5a23f3e3911edd53f366e357487a9da194. 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/DGA0R2322059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f7ab7d4640324847521bdc21c221b4bbf923068048cef4934575315d047cec. 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/DGA0R2322068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba75dfdb4489b91a64b66cd3b5846aabf64e40495edb079c9f3fde2bc484661. 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/VNA0F2316281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76825fba7af41f4911827714c3a80d36967128c3c76397a143b57d9732a9cde4. 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/VNA0F2316287.