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 0x79253749bd94021f714fadaba83ca98534e83c9e6b0fa5ae6cfb9c39962e27ef. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/722dd8f6-8781-404e-bd71-6841c502dec8.json and https://artists.proofprofile.net/proofs/artist/722dd8f6-8781-404e-bd71-6841c502dec8.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 0x59f606a8e51401458c174fa370e247436f4581deb1543002db80fd13d8c5bd10. 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/QMDA72204548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f67a0489de472571b18f4e282f7586552f9121209d5433e4608163f353aecd4. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QMDA72204549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6f228be1609f36ab6f549c2fb8097b823892430843e7717bd7b74089df65be. 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/QMDA72204551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44c6b0935bb44e071219b1c34fa2c1d9d7d7973b20aae4220bde24bb1c44517. 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/QMDA72204555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09deb5d10e0957757d85f8bdf3f6deef49ac7ff6f5e09aec806f5d009557c7f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:40Z), 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/QMDA72204550.
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 0x105dbbd6145ff4fc676a5d7ae3bfedb8c1b0ebf5ddb96aeb924e216e609c4bd7. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QMDA72204552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3d099fc8282f6a54c3d77449666d7d27bd5cb71489a6de9a55490c1b1fad46. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QMDA72204553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f57c1c2b73712a4d98f73a5b84e2c8f4a531f1a0cb4b2c8d426268ed0f487. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA72204554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879110808c2a7b21b0774523ffdb9ff0c8fc80c5c233bb8936039ccd5868495c. 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/QMFME2167746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767a6954a99a75d87924911eb3e25007c94cb5b3d1865a8ffd29c5ed3d355e49. 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/QMFME2167748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54ea4b27fd33e1e410f1d51ea1e7e7dfc369dcd2c49fdf9f327f45330093174. 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/QMFME2167749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f08c8a1de34f052e629d6b545704cbb4a536c0e7402f632e19e62ba751ae3a5. 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/QMFME2167750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c08fde4c08ecdccb671b699594979aa8d2aa3bc93909a43f8b3cd0dc363922. 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/QMFME2167752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb6f534c18a8405fda102d70baa6131c67f3fcdf2ea2a932ca28951ab026d0d. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QMFME2167753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2798a1bb7e7a769fb949b6c209bdecd3e2fce7bdb53b76ea0f3327a4bb278608. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMFME2167747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a705815dd50fee8b472a78dbf679b88584fa7d0336f60fbc2812b6b05aa525. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMFME2167751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6108674641ff306bbd3a5674bfff23b04e58f1986b81f7ed35b18aa376c51. 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/QM7281906595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf596dfc32ca14b322b3319e39a48d0641beb13d85a8a409c372d2f85eb5655c9. 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/QM7281906598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b5fb7ae554f2df74bf94ed1eda26074b8c98f9ea2dd97c6c04742e999d71a5. 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/QM7281906602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601622656fedf893e860e82f91ab75ca10ab754c9fbed8f56f44e70a3ded3c2a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM7281906596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdbdd242497a1c04a9b98a9b2ee22535f3164888fea05539fd14e671560eb30. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM7281906597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c743f42db60e6c46ed25d4cbb0d1c95e6acf10952f897f2eed875fe9154f49c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QM7281906599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1421c5a08f210227107efaf714fe0bae6bfe7ced485a751c3232570c03f84186. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/QM7281906600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31c3e4b754e199fa1c95ce513c6e1102fdce7bbc8bfd40995db0fdf40e4d516. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM7281906601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d347accb3317c4a63413aafa8160718813ca322737719d17bbd05c3b28f1d28. 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/QM4TX1825709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f5a64b6bc56e0be67b320ad2d1f003c3356961798bb58f84dda9f60f25f1e6. 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/QM4TX1825710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e3c0c89c0056a4102c699bfa994b8663a23825254db459800d5eeeb387fd7. 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/QM4TX1825715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8bf4833604b0e695147ec050eb347c1290ceeb3da3bd6fcd88627f1686751f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TX1825708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17eb8356bfcf48ff72b7cf6a60afbaf153a6db2106df8691f35c473b0ef07c73. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QM4TX1825711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64af66c75eafdb8aadac075dded5b6dbfec1bb9a698b604e65c183324911670c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM4TX1825712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefba7b0f467eac8eeb40c4c86c1817a6dd012754c5847f8d03d22da29866c5c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM4TX1825713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce81f3fa770fecbbbcd53663eaf689405671d6dd7980b1f0c0d9d0bd50da0a3. 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/QM4TX1825714.