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 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 0x42ea639904216b89c3fec611381c1c2bcf5dc6fc29c75c69effd7ff37c6d335c. 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/dc3fc236-38bc-431e-8b99-881284d3850b.json and https://artists.proofprofile.net/proofs/artist/dc3fc236-38bc-431e-8b99-881284d3850b.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 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 0x512362cd625dc7d4fb0d126423197917930c288caaed7bb392f795f74e92e32b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QM24S1925422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a01133a81a024ec95dd62fbe0e32c62ca2327f02ca2a00608afc3ddd8653e1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM24S1925425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74743c27af1ea3368b1f6b47a48293ff7e6c9f609aed34ff3cba2d0bf5a0054. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM24S1925423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32a4a111ecd65797c144a39c7658ccd936d3c3ece64bf3a03070125cb1f0387. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QM24S2000529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ad4d5f2a1f7930239da4c3379d060d780003d42d8cca3d0f5a693e8f89d157. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM24S2002955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0f441514a50d884cfc0ece275b23b378e3ca07ae52ddbba58c656c12238162. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QM24S2003028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62069efe788b4885d7dae3cd5ba4c43a93741d1a1c58de00d49e8f51f98480a7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QM24S2010986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eb14d020f557e9a20e70cf6910d804d856ad564bfdbe1e9443def754da462e. 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/QM24S2102301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592306cb72c713349bf70c7ce706de79ce46aa72849d7f6dd5b2293ba88015b3. 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/QM24S2102748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6df1757342888993b5a60eb97c3b4ea94d7a52930908d2798b60c7546f7f46. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM24S2103162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae0db94794ae5d2d6af28b6a944437503b639b69c8bc004c1a1da572b821c7f. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM24S2103164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b1c23f44530b76e19e6ba65de423b4b0be4a8e46842269d6ba3dbd3e6ce988. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM24S2200405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0d91d9ff8fc6a88c7acd214035fa1b869562ccfdb3faa1dd6d33aae73a6764. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZHNB2288572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7022a05935fd3e990f402ea8de84aac7523df22b3cfb1b57ecd8dc1365e9420. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZMEM2235633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7022a05935fd3e990f402ea8de84aac7523df22b3cfb1b57ecd8dc1365e9420. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZMEM2235633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7022a05935fd3e990f402ea8de84aac7523df22b3cfb1b57ecd8dc1365e9420. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZMEM2235633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71699bf508cb1c82b302ba8cc66f57ed7f159b4f8efabc5c298105260a6d2dfd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM24S2307172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee736ebc6196c4085e153c90f900b5c33aeb626e1336ff83fc70c6a7dbf63cd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTGW2401740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe513aff27ab61996618180472a927138376555f9637a443f0650d0ba57f8d25. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZTGW2401741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9074a3a7f968cc7fca5cd5f7798c6a351f4ade813713cd782e5af4a7a41276. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZTGW2401742.